/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 21:50:40,090 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 21:50:40,092 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 21:50:40,119 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 21:50:40,146 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 21:50:40,161 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 21:50:40,161 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 21:50:40,161 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 21:50:40,161 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 21:50:40,162 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 21:50:40,162 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 21:50:40,162 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 21:50:40,162 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 21:50:40,162 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 21:50:40,162 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 21:50:40,163 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 21:50:40,163 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 21:50:40,163 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 21:50:40,163 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 21:50:40,163 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 21:50:40,163 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 21:50:40,163 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 21:50:40,163 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 21:50:40,163 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 21:50:40,164 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 21:50:40,164 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 21:50:40,164 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 21:50:40,164 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 21:50:40,164 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 21:50:40,164 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 21:50:40,164 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 21:50:40,164 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 21:50:40,164 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 21:50:40,165 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 21:50:40,165 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 21:50:40,165 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 21:50:40,165 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 21:50:40,413 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 21:50:40,427 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 21:50:40,429 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 21:50:40,430 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 21:50:40,431 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 21:50:40,432 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-symm.wvr.bpl [2021-06-05 21:50:40,432 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-symm.wvr.bpl' [2021-06-05 21:50:40,456 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 21:50:40,457 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 21:50:40,458 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 21:50:40,459 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 21:50:40,459 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 21:50:40,467 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:50:40" (1/1) ... [2021-06-05 21:50:40,473 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:50:40" (1/1) ... [2021-06-05 21:50:40,478 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 21:50:40,479 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 21:50:40,480 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 21:50:40,481 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 21:50:40,487 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:50:40" (1/1) ... [2021-06-05 21:50:40,487 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:50:40" (1/1) ... [2021-06-05 21:50:40,488 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:50:40" (1/1) ... [2021-06-05 21:50:40,488 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:50:40" (1/1) ... [2021-06-05 21:50:40,492 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:50:40" (1/1) ... [2021-06-05 21:50:40,494 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:50:40" (1/1) ... [2021-06-05 21:50:40,495 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:50:40" (1/1) ... [2021-06-05 21:50:40,499 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 21:50:40,505 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 21:50:40,505 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 21:50:40,505 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 21:50:40,514 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:50:40" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 21:50:40,570 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 21:50:40,570 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 21:50:40,570 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 21:50:40,570 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 21:50:40,571 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 21:50:40,571 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 21:50:40,571 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 21:50:40,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 21:50:40,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 21:50:40,572 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 21:50:40,847 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 21:50:40,847 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-05 21:50:40,848 INFO L202 PluginConnector]: Adding new model chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 09:50:40 BoogieIcfgContainer [2021-06-05 21:50:40,848 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 21:50:40,855 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 21:50:40,855 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 21:50:40,858 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 21:50:40,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:50:40" (1/2) ... [2021-06-05 21:50:40,858 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@776c94ee and model type chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 09:50:40, skipping insertion in model container [2021-06-05 21:50:40,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 09:50:40" (2/2) ... [2021-06-05 21:50:40,860 INFO L111 eAbstractionObserver]: Analyzing ICFG chromosome-symm.wvr.bpl [2021-06-05 21:50:40,864 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 21:50:40,864 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 21:50:40,864 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 21:50:40,865 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 21:50:40,904 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 21:50:40,918 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 21:50:40,934 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 21:50:40,934 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 21:50:40,934 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 21:50:40,934 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 21:50:40,934 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 21:50:40,934 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 21:50:40,934 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 21:50:40,934 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 21:50:40,939 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 23 places, 18 transitions, 52 flow [2021-06-05 21:50:40,950 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 30 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:40,952 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:40,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 21:50:40,956 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:40,956 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:40,956 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:40,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:40,964 INFO L82 PathProgramCache]: Analyzing trace with hash -257954186, now seen corresponding path program 1 times [2021-06-05 21:50:40,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:40,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703270444] [2021-06-05 21:50:40,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:41,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:41,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:41,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:41,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703270444] [2021-06-05 21:50:41,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703270444] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:50:41,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:50:41,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 21:50:41,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299669268] [2021-06-05 21:50:41,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 21:50:41,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:41,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 21:50:41,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:50:41,111 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:41,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:41,140 INFO L93 Difference]: Finished difference Result 50 states and 90 transitions. [2021-06-05 21:50:41,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 21:50:41,141 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 21:50:41,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:41,148 INFO L225 Difference]: With dead ends: 50 [2021-06-05 21:50:41,148 INFO L226 Difference]: Without dead ends: 45 [2021-06-05 21:50:41,151 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:50:41,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-06-05 21:50:41,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2021-06-05 21:50:41,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:41,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 56 transitions. [2021-06-05 21:50:41,181 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 56 transitions. Word has length 12 [2021-06-05 21:50:41,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:41,182 INFO L482 AbstractCegarLoop]: Abstraction has 30 states and 56 transitions. [2021-06-05 21:50:41,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:41,182 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 56 transitions. [2021-06-05 21:50:41,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 21:50:41,183 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:41,183 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:41,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 21:50:41,184 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:41,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:41,186 INFO L82 PathProgramCache]: Analyzing trace with hash 255431018, now seen corresponding path program 2 times [2021-06-05 21:50:41,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:41,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56308706] [2021-06-05 21:50:41,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:41,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:41,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:41,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:41,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56308706] [2021-06-05 21:50:41,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56308706] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:50:41,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:50:41,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 21:50:41,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234845619] [2021-06-05 21:50:41,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 21:50:41,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:41,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 21:50:41,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:50:41,247 INFO L87 Difference]: Start difference. First operand 30 states and 56 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:41,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:41,265 INFO L93 Difference]: Finished difference Result 48 states and 89 transitions. [2021-06-05 21:50:41,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 21:50:41,266 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 21:50:41,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:41,267 INFO L225 Difference]: With dead ends: 48 [2021-06-05 21:50:41,267 INFO L226 Difference]: Without dead ends: 48 [2021-06-05 21:50:41,268 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:50:41,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-06-05 21:50:41,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 33. [2021-06-05 21:50:41,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.9375) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:41,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 62 transitions. [2021-06-05 21:50:41,279 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 62 transitions. Word has length 12 [2021-06-05 21:50:41,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:41,279 INFO L482 AbstractCegarLoop]: Abstraction has 33 states and 62 transitions. [2021-06-05 21:50:41,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:41,280 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 62 transitions. [2021-06-05 21:50:41,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 21:50:41,281 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:41,281 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:41,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 21:50:41,282 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:41,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:41,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1890739742, now seen corresponding path program 3 times [2021-06-05 21:50:41,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:41,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755374730] [2021-06-05 21:50:41,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:41,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:41,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:41,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:41,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755374730] [2021-06-05 21:50:41,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755374730] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:50:41,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:50:41,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 21:50:41,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085410277] [2021-06-05 21:50:41,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 21:50:41,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:41,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 21:50:41,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:50:41,331 INFO L87 Difference]: Start difference. First operand 33 states and 62 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:41,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:41,363 INFO L93 Difference]: Finished difference Result 36 states and 68 transitions. [2021-06-05 21:50:41,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 21:50:41,364 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 21:50:41,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:41,365 INFO L225 Difference]: With dead ends: 36 [2021-06-05 21:50:41,365 INFO L226 Difference]: Without dead ends: 36 [2021-06-05 21:50:41,366 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:50:41,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-06-05 21:50:41,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2021-06-05 21:50:41,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.9375) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:41,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 62 transitions. [2021-06-05 21:50:41,376 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 62 transitions. Word has length 12 [2021-06-05 21:50:41,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:41,377 INFO L482 AbstractCegarLoop]: Abstraction has 33 states and 62 transitions. [2021-06-05 21:50:41,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:41,377 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 62 transitions. [2021-06-05 21:50:41,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 21:50:41,377 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:41,377 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:41,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 21:50:41,378 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:41,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:41,378 INFO L82 PathProgramCache]: Analyzing trace with hash -309182698, now seen corresponding path program 1 times [2021-06-05 21:50:41,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:41,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027696245] [2021-06-05 21:50:41,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:41,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:41,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:50:41,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:41,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027696245] [2021-06-05 21:50:41,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027696245] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:50:41,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:50:41,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 21:50:41,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534707159] [2021-06-05 21:50:41,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 21:50:41,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:41,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 21:50:41,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:50:41,441 INFO L87 Difference]: Start difference. First operand 33 states and 62 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:41,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:41,462 INFO L93 Difference]: Finished difference Result 38 states and 72 transitions. [2021-06-05 21:50:41,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 21:50:41,463 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 21:50:41,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:41,465 INFO L225 Difference]: With dead ends: 38 [2021-06-05 21:50:41,465 INFO L226 Difference]: Without dead ends: 38 [2021-06-05 21:50:41,465 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:50:41,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-06-05 21:50:41,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-06-05 21:50:41,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.945945945945946) internal successors, (72), 37 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:41,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 72 transitions. [2021-06-05 21:50:41,473 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 72 transitions. Word has length 13 [2021-06-05 21:50:41,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:41,473 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 72 transitions. [2021-06-05 21:50:41,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:41,474 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 72 transitions. [2021-06-05 21:50:41,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 21:50:41,474 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:41,474 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:41,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 21:50:41,474 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:41,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:41,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1319300302, now seen corresponding path program 2 times [2021-06-05 21:50:41,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:41,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204513647] [2021-06-05 21:50:41,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:41,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:41,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:50:41,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:41,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204513647] [2021-06-05 21:50:41,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204513647] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:50:41,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:50:41,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 21:50:41,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546654281] [2021-06-05 21:50:41,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 21:50:41,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:41,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 21:50:41,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:50:41,511 INFO L87 Difference]: Start difference. First operand 38 states and 72 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:41,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:41,524 INFO L93 Difference]: Finished difference Result 59 states and 106 transitions. [2021-06-05 21:50:41,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 21:50:41,525 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 21:50:41,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:41,525 INFO L225 Difference]: With dead ends: 59 [2021-06-05 21:50:41,525 INFO L226 Difference]: Without dead ends: 59 [2021-06-05 21:50:41,525 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:50:41,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-06-05 21:50:41,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 39. [2021-06-05 21:50:41,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:41,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 75 transitions. [2021-06-05 21:50:41,528 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 75 transitions. Word has length 13 [2021-06-05 21:50:41,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:41,528 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 75 transitions. [2021-06-05 21:50:41,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:41,529 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 75 transitions. [2021-06-05 21:50:41,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 21:50:41,529 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:41,529 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:41,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 21:50:41,529 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:41,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:41,530 INFO L82 PathProgramCache]: Analyzing trace with hash -626720332, now seen corresponding path program 3 times [2021-06-05 21:50:41,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:41,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402272067] [2021-06-05 21:50:41,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:41,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:41,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:50:41,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:41,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402272067] [2021-06-05 21:50:41,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402272067] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:50:41,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:50:41,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 21:50:41,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220530676] [2021-06-05 21:50:41,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 21:50:41,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:41,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 21:50:41,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:50:41,560 INFO L87 Difference]: Start difference. First operand 39 states and 75 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:41,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:41,572 INFO L93 Difference]: Finished difference Result 41 states and 76 transitions. [2021-06-05 21:50:41,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 21:50:41,572 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 21:50:41,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:41,573 INFO L225 Difference]: With dead ends: 41 [2021-06-05 21:50:41,573 INFO L226 Difference]: Without dead ends: 39 [2021-06-05 21:50:41,574 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:50:41,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-06-05 21:50:41,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-06-05 21:50:41,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:41,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 74 transitions. [2021-06-05 21:50:41,582 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 74 transitions. Word has length 13 [2021-06-05 21:50:41,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:41,582 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 74 transitions. [2021-06-05 21:50:41,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:41,582 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 74 transitions. [2021-06-05 21:50:41,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:50:41,583 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:41,583 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:41,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 21:50:41,583 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:41,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:41,583 INFO L82 PathProgramCache]: Analyzing trace with hash -968107418, now seen corresponding path program 1 times [2021-06-05 21:50:41,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:41,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852060782] [2021-06-05 21:50:41,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:41,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:41,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:41,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:41,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852060782] [2021-06-05 21:50:41,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852060782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:41,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444650315] [2021-06-05 21:50:41,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:41,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:41,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:50:41,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:42,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 21:50:42,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:50:42,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 21:50:42,058 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:50:42,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:50:42,075 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:50:42,076 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:50:42,076 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:79, output treesize:39 [2021-06-05 21:50:42,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:42,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444650315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:42,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:42,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 21:50:42,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110354852] [2021-06-05 21:50:42,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:50:42,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:42,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:50:42,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:50:42,171 INFO L87 Difference]: Start difference. First operand 39 states and 74 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:42,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:42,371 INFO L93 Difference]: Finished difference Result 78 states and 144 transitions. [2021-06-05 21:50:42,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:50:42,372 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:50:42,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:42,372 INFO L225 Difference]: With dead ends: 78 [2021-06-05 21:50:42,373 INFO L226 Difference]: Without dead ends: 71 [2021-06-05 21:50:42,373 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 343.4ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:50:42,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-06-05 21:50:42,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 49. [2021-06-05 21:50:42,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.9375) internal successors, (93), 48 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:42,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 93 transitions. [2021-06-05 21:50:42,375 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 93 transitions. Word has length 14 [2021-06-05 21:50:42,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:42,376 INFO L482 AbstractCegarLoop]: Abstraction has 49 states and 93 transitions. [2021-06-05 21:50:42,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:42,376 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 93 transitions. [2021-06-05 21:50:42,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:50:42,376 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:42,376 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:42,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-06-05 21:50:42,596 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:42,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:42,596 INFO L82 PathProgramCache]: Analyzing trace with hash 2061932018, now seen corresponding path program 2 times [2021-06-05 21:50:42,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:42,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281705900] [2021-06-05 21:50:42,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:42,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:42,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:42,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:42,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281705900] [2021-06-05 21:50:42,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281705900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:42,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18855072] [2021-06-05 21:50:42,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:42,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:50:42,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:50:42,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:50:42,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:43,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:43,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:50:43,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:50:43,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:50:43,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:43,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:50:43,082 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:50:43,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:50:43,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:50:43,091 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2021-06-05 21:50:43,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:43,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18855072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:43,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:43,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 21:50:43,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868727906] [2021-06-05 21:50:43,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:50:43,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:43,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:50:43,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:50:43,133 INFO L87 Difference]: Start difference. First operand 49 states and 93 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:43,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:43,502 INFO L93 Difference]: Finished difference Result 101 states and 189 transitions. [2021-06-05 21:50:43,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:50:43,503 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:50:43,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:43,503 INFO L225 Difference]: With dead ends: 101 [2021-06-05 21:50:43,503 INFO L226 Difference]: Without dead ends: 85 [2021-06-05 21:50:43,503 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 476.4ms TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:50:43,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-06-05 21:50:43,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 51. [2021-06-05 21:50:43,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.98) internal successors, (99), 50 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:43,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 99 transitions. [2021-06-05 21:50:43,506 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 99 transitions. Word has length 14 [2021-06-05 21:50:43,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:43,506 INFO L482 AbstractCegarLoop]: Abstraction has 51 states and 99 transitions. [2021-06-05 21:50:43,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:43,506 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 99 transitions. [2021-06-05 21:50:43,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:50:43,507 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:43,507 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:43,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 21:50:43,708 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:43,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:43,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1138943690, now seen corresponding path program 3 times [2021-06-05 21:50:43,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:43,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586815416] [2021-06-05 21:50:43,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:43,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:43,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:43,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:43,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586815416] [2021-06-05 21:50:43,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586815416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:43,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695582470] [2021-06-05 21:50:43,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 21:50:43,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 21:50:43,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:43,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:50:43,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:44,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:44,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:50:44,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:50:44,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:50:44,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:44,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:50:44,039 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:50:44,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:50:44,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:50:44,047 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2021-06-05 21:50:44,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:44,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695582470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:44,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:44,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 21:50:44,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345805067] [2021-06-05 21:50:44,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:50:44,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:44,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:50:44,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:50:44,083 INFO L87 Difference]: Start difference. First operand 51 states and 99 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:44,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:44,272 INFO L93 Difference]: Finished difference Result 69 states and 134 transitions. [2021-06-05 21:50:44,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:50:44,272 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:50:44,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:44,273 INFO L225 Difference]: With dead ends: 69 [2021-06-05 21:50:44,273 INFO L226 Difference]: Without dead ends: 62 [2021-06-05 21:50:44,273 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 247.6ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:50:44,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-06-05 21:50:44,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2021-06-05 21:50:44,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.0) internal successors, (104), 52 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:44,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 104 transitions. [2021-06-05 21:50:44,275 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 104 transitions. Word has length 14 [2021-06-05 21:50:44,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:44,276 INFO L482 AbstractCegarLoop]: Abstraction has 53 states and 104 transitions. [2021-06-05 21:50:44,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:44,276 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 104 transitions. [2021-06-05 21:50:44,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:50:44,276 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:44,276 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:44,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 21:50:44,489 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:44,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:44,489 INFO L82 PathProgramCache]: Analyzing trace with hash -2758418, now seen corresponding path program 4 times [2021-06-05 21:50:44,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:44,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037569698] [2021-06-05 21:50:44,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:44,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:44,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:44,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:44,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037569698] [2021-06-05 21:50:44,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037569698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:44,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592690871] [2021-06-05 21:50:44,678 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:44,703 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:50:44,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:50:44,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:50:44,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:44,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:44,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:50:44,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:50:44,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:50:44,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:44,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:50:44,829 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:50:44,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:50:44,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:44,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:50:44,859 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:50:44,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:50:44,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:44,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:50:44,892 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:50:44,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:50:44,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:50:44,923 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-06-05 21:50:44,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:44,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592690871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:44,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:44,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 21:50:45,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48557115] [2021-06-05 21:50:45,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:50:45,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:45,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:50:45,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:50:45,000 INFO L87 Difference]: Start difference. First operand 53 states and 104 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:45,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:45,219 INFO L93 Difference]: Finished difference Result 75 states and 146 transitions. [2021-06-05 21:50:45,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:50:45,220 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:50:45,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:45,220 INFO L225 Difference]: With dead ends: 75 [2021-06-05 21:50:45,220 INFO L226 Difference]: Without dead ends: 66 [2021-06-05 21:50:45,220 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 338.8ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:50:45,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-06-05 21:50:45,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 52. [2021-06-05 21:50:45,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.9803921568627452) internal successors, (101), 51 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:45,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 101 transitions. [2021-06-05 21:50:45,223 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 101 transitions. Word has length 14 [2021-06-05 21:50:45,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:45,223 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 101 transitions. [2021-06-05 21:50:45,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:45,223 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 101 transitions. [2021-06-05 21:50:45,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:50:45,223 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:45,223 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:45,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:45,444 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:45,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:45,445 INFO L82 PathProgramCache]: Analyzing trace with hash 2146038118, now seen corresponding path program 5 times [2021-06-05 21:50:45,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:45,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239588129] [2021-06-05 21:50:45,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:45,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:45,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:45,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:45,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239588129] [2021-06-05 21:50:45,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239588129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:45,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513201090] [2021-06-05 21:50:45,623 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 21:50:45,657 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:50:45,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:50:45,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:50:45,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:45,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:45,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:45,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:50:45,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:50:45,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:45,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:50:45,714 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:50:45,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:50:45,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:45,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:45,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:50:45,752 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:50:45,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:45,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:50:45,758 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:50:45,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:50:45,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:50:45,795 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 21:50:45,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:45,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513201090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:45,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:45,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 21:50:45,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070894673] [2021-06-05 21:50:45,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:50:45,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:45,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:50:45,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:50:45,867 INFO L87 Difference]: Start difference. First operand 52 states and 101 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:46,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:46,355 INFO L93 Difference]: Finished difference Result 116 states and 214 transitions. [2021-06-05 21:50:46,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:50:46,356 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:50:46,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:46,356 INFO L225 Difference]: With dead ends: 116 [2021-06-05 21:50:46,356 INFO L226 Difference]: Without dead ends: 93 [2021-06-05 21:50:46,356 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 564.8ms TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:50:46,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-06-05 21:50:46,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 58. [2021-06-05 21:50:46,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.0701754385964914) internal successors, (118), 57 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:46,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 118 transitions. [2021-06-05 21:50:46,359 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 118 transitions. Word has length 14 [2021-06-05 21:50:46,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:46,359 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 118 transitions. [2021-06-05 21:50:46,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:46,359 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 118 transitions. [2021-06-05 21:50:46,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:50:46,359 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:46,360 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:46,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 21:50:46,573 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:46,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:46,573 INFO L82 PathProgramCache]: Analyzing trace with hash -2024741970, now seen corresponding path program 6 times [2021-06-05 21:50:46,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:46,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724576284] [2021-06-05 21:50:46,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:46,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:46,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:46,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:46,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724576284] [2021-06-05 21:50:46,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724576284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:46,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533514167] [2021-06-05 21:50:46,715 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:46,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 21:50:46,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:50:46,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:50:46,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:46,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:46,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:50:46,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:50:46,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:50:46,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:46,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 21:50:46,876 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:50:46,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:50:46,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:50:46,883 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-06-05 21:50:46,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:46,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533514167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:46,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:46,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 21:50:46,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655994119] [2021-06-05 21:50:46,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:50:46,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:46,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:50:46,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:50:46,917 INFO L87 Difference]: Start difference. First operand 58 states and 118 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:47,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:47,091 INFO L93 Difference]: Finished difference Result 78 states and 156 transitions. [2021-06-05 21:50:47,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:50:47,091 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:50:47,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:47,092 INFO L225 Difference]: With dead ends: 78 [2021-06-05 21:50:47,092 INFO L226 Difference]: Without dead ends: 71 [2021-06-05 21:50:47,092 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 257.8ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:50:47,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-06-05 21:50:47,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 59. [2021-06-05 21:50:47,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.086206896551724) internal successors, (121), 58 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:47,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 121 transitions. [2021-06-05 21:50:47,094 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 121 transitions. Word has length 14 [2021-06-05 21:50:47,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:47,094 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 121 transitions. [2021-06-05 21:50:47,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:47,095 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 121 transitions. [2021-06-05 21:50:47,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:50:47,095 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:47,095 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:47,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:47,314 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:47,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:47,314 INFO L82 PathProgramCache]: Analyzing trace with hash -888556698, now seen corresponding path program 7 times [2021-06-05 21:50:47,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:47,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563987012] [2021-06-05 21:50:47,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:47,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:47,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:47,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:47,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563987012] [2021-06-05 21:50:47,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563987012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:47,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674255201] [2021-06-05 21:50:47,402 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:47,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:47,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:50:47,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:47,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:47,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:47,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:50:47,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:50:47,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:47,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:50:47,494 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:50:47,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:50:47,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:47,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:47,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:50:47,529 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:50:47,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:47,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:50:47,534 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:50:47,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:50:47,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:50:47,557 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 21:50:47,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:47,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674255201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:47,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:47,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 21:50:47,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521054088] [2021-06-05 21:50:47,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:50:47,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:47,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:50:47,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:50:47,643 INFO L87 Difference]: Start difference. First operand 59 states and 121 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:47,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:47,889 INFO L93 Difference]: Finished difference Result 84 states and 168 transitions. [2021-06-05 21:50:47,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:50:47,889 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:50:47,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:47,890 INFO L225 Difference]: With dead ends: 84 [2021-06-05 21:50:47,890 INFO L226 Difference]: Without dead ends: 75 [2021-06-05 21:50:47,890 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 282.0ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:50:47,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-06-05 21:50:47,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 58. [2021-06-05 21:50:47,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.0701754385964914) internal successors, (118), 57 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:47,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 118 transitions. [2021-06-05 21:50:47,892 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 118 transitions. Word has length 14 [2021-06-05 21:50:47,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:47,892 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 118 transitions. [2021-06-05 21:50:47,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:47,892 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 118 transitions. [2021-06-05 21:50:47,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:50:47,893 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:47,893 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:48,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 21:50:48,103 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:48,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:48,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1260239838, now seen corresponding path program 8 times [2021-06-05 21:50:48,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:48,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801345901] [2021-06-05 21:50:48,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:48,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:48,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:48,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:48,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801345901] [2021-06-05 21:50:48,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801345901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:48,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478460867] [2021-06-05 21:50:48,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:48,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:50:48,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:50:48,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:50:48,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:48,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:48,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:50:48,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:50:48,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:50:48,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:48,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:50:48,393 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:50:48,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:50:48,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:48,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:50:48,420 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:50:48,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:50:48,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:48,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:50:48,447 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:50:48,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:50:48,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:50:48,484 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-06-05 21:50:48,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:48,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478460867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:48,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:48,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 21:50:48,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501416429] [2021-06-05 21:50:48,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:50:48,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:48,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:50:48,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:50:48,574 INFO L87 Difference]: Start difference. First operand 58 states and 118 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:48,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:48,705 INFO L93 Difference]: Finished difference Result 86 states and 167 transitions. [2021-06-05 21:50:48,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:50:48,706 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:50:48,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:48,707 INFO L225 Difference]: With dead ends: 86 [2021-06-05 21:50:48,707 INFO L226 Difference]: Without dead ends: 72 [2021-06-05 21:50:48,707 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 241.7ms TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:50:48,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-06-05 21:50:48,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 60. [2021-06-05 21:50:48,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.1186440677966103) internal successors, (125), 59 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:48,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 125 transitions. [2021-06-05 21:50:48,709 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 125 transitions. Word has length 14 [2021-06-05 21:50:48,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:48,709 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 125 transitions. [2021-06-05 21:50:48,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:48,710 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 125 transitions. [2021-06-05 21:50:48,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:50:48,710 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:48,710 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:48,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 21:50:48,921 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:48,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:48,921 INFO L82 PathProgramCache]: Analyzing trace with hash 247547306, now seen corresponding path program 9 times [2021-06-05 21:50:48,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:48,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546365934] [2021-06-05 21:50:48,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:48,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:49,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:49,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:49,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546365934] [2021-06-05 21:50:49,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546365934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:49,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287596086] [2021-06-05 21:50:49,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:49,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:50:49,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:50:49,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:50:49,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:49,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:49,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:50:49,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:50:49,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:50:49,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:49,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:50:49,287 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:50:49,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:50:49,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:49,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:50:49,318 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:50:49,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:50:49,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:49,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:50:49,346 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:50:49,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:50:49,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:50:49,370 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-06-05 21:50:49,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:49,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287596086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:49,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:49,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 21:50:49,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657596942] [2021-06-05 21:50:49,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:50:49,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:49,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:50:49,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:50:49,477 INFO L87 Difference]: Start difference. First operand 60 states and 125 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:49,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:49,688 INFO L93 Difference]: Finished difference Result 108 states and 210 transitions. [2021-06-05 21:50:49,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:50:49,689 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:50:49,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:49,689 INFO L225 Difference]: With dead ends: 108 [2021-06-05 21:50:49,689 INFO L226 Difference]: Without dead ends: 94 [2021-06-05 21:50:49,690 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 359.8ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:50:49,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-05 21:50:49,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 63. [2021-06-05 21:50:49,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.1129032258064515) internal successors, (131), 62 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:49,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 131 transitions. [2021-06-05 21:50:49,691 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 131 transitions. Word has length 14 [2021-06-05 21:50:49,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:49,692 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 131 transitions. [2021-06-05 21:50:49,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:49,692 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 131 transitions. [2021-06-05 21:50:49,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:50:49,692 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:49,692 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:49,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 21:50:49,893 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:49,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:49,893 INFO L82 PathProgramCache]: Analyzing trace with hash 80062742, now seen corresponding path program 10 times [2021-06-05 21:50:49,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:49,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834533676] [2021-06-05 21:50:49,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:49,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:49,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:49,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:49,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834533676] [2021-06-05 21:50:49,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834533676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:49,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432950715] [2021-06-05 21:50:49,948 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:49,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:50:49,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:50:49,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:50:49,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:50,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:50,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432950715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:50,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:50,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 21:50:50,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562686035] [2021-06-05 21:50:50,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:50:50,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:50,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:50:50,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:50:50,053 INFO L87 Difference]: Start difference. First operand 63 states and 131 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:50,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:50,285 INFO L93 Difference]: Finished difference Result 89 states and 173 transitions. [2021-06-05 21:50:50,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:50:50,286 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:50:50,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:50,286 INFO L225 Difference]: With dead ends: 89 [2021-06-05 21:50:50,286 INFO L226 Difference]: Without dead ends: 78 [2021-06-05 21:50:50,286 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 257.6ms TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:50:50,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-06-05 21:50:50,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2021-06-05 21:50:50,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 57 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:50,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 121 transitions. [2021-06-05 21:50:50,288 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 121 transitions. Word has length 15 [2021-06-05 21:50:50,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:50,289 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 121 transitions. [2021-06-05 21:50:50,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:50,289 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 121 transitions. [2021-06-05 21:50:50,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:50:50,289 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:50,289 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:50,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:50,490 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:50,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:50,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1340900102, now seen corresponding path program 11 times [2021-06-05 21:50:50,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:50,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201523181] [2021-06-05 21:50:50,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:50,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:50,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:50,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:50,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201523181] [2021-06-05 21:50:50,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201523181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:50,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964491189] [2021-06-05 21:50:50,549 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:50,579 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:50:50,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:50:50,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:50:50,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:50,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:50,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964491189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:50,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:50,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 21:50:50,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196036218] [2021-06-05 21:50:50,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:50:50,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:50,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:50:50,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:50:50,641 INFO L87 Difference]: Start difference. First operand 58 states and 121 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:50,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:50,689 INFO L93 Difference]: Finished difference Result 86 states and 172 transitions. [2021-06-05 21:50:50,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:50:50,689 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:50:50,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:50,689 INFO L225 Difference]: With dead ends: 86 [2021-06-05 21:50:50,689 INFO L226 Difference]: Without dead ends: 86 [2021-06-05 21:50:50,690 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 47.7ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:50:50,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-06-05 21:50:50,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 59. [2021-06-05 21:50:50,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.1379310344827585) internal successors, (124), 58 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:50,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 124 transitions. [2021-06-05 21:50:50,691 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 124 transitions. Word has length 15 [2021-06-05 21:50:50,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:50,691 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 124 transitions. [2021-06-05 21:50:50,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:50,691 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 124 transitions. [2021-06-05 21:50:50,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:50:50,692 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:50,692 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:50,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 21:50:50,908 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:50,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:50,908 INFO L82 PathProgramCache]: Analyzing trace with hash -477995254, now seen corresponding path program 12 times [2021-06-05 21:50:50,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:50,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708860247] [2021-06-05 21:50:50,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:50,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:50,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:50,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:50,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708860247] [2021-06-05 21:50:50,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708860247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:50,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130773364] [2021-06-05 21:50:50,990 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:51,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 21:50:51,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:50:51,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:50:51,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:51,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:51,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130773364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:51,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:51,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:50:51,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251457385] [2021-06-05 21:50:51,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:50:51,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:51,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:50:51,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:50:51,143 INFO L87 Difference]: Start difference. First operand 59 states and 124 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:51,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:51,418 INFO L93 Difference]: Finished difference Result 89 states and 174 transitions. [2021-06-05 21:50:51,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:50:51,418 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:50:51,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:51,419 INFO L225 Difference]: With dead ends: 89 [2021-06-05 21:50:51,419 INFO L226 Difference]: Without dead ends: 83 [2021-06-05 21:50:51,419 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 302.4ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:50:51,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-06-05 21:50:51,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2021-06-05 21:50:51,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.135593220338983) internal successors, (126), 59 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:51,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 126 transitions. [2021-06-05 21:50:51,420 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 126 transitions. Word has length 15 [2021-06-05 21:50:51,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:51,421 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 126 transitions. [2021-06-05 21:50:51,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:51,421 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 126 transitions. [2021-06-05 21:50:51,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:50:51,421 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:51,421 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:51,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 21:50:51,625 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:51,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:51,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1170063830, now seen corresponding path program 13 times [2021-06-05 21:50:51,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:51,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482285778] [2021-06-05 21:50:51,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:51,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:51,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:51,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:51,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482285778] [2021-06-05 21:50:51,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482285778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:51,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001451664] [2021-06-05 21:50:51,671 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:51,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:51,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:50:51,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:51,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:51,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001451664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:51,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:51,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:50:51,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58840999] [2021-06-05 21:50:51,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:50:51,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:51,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:50:51,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:50:51,824 INFO L87 Difference]: Start difference. First operand 60 states and 126 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:51,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:51,931 INFO L93 Difference]: Finished difference Result 99 states and 198 transitions. [2021-06-05 21:50:51,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:50:51,932 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:50:51,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:51,932 INFO L225 Difference]: With dead ends: 99 [2021-06-05 21:50:51,932 INFO L226 Difference]: Without dead ends: 99 [2021-06-05 21:50:51,932 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 119.3ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:50:51,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-06-05 21:50:51,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 60. [2021-06-05 21:50:51,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.135593220338983) internal successors, (126), 59 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:51,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 126 transitions. [2021-06-05 21:50:51,936 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 126 transitions. Word has length 15 [2021-06-05 21:50:51,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:51,936 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 126 transitions. [2021-06-05 21:50:51,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:51,936 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 126 transitions. [2021-06-05 21:50:51,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:50:51,937 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:51,937 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:52,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 21:50:52,157 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:52,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:52,157 INFO L82 PathProgramCache]: Analyzing trace with hash 384009810, now seen corresponding path program 14 times [2021-06-05 21:50:52,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:52,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666862725] [2021-06-05 21:50:52,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:52,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:52,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:52,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:52,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666862725] [2021-06-05 21:50:52,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666862725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:52,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024889064] [2021-06-05 21:50:52,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:52,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:50:52,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:50:52,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:50:52,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:52,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:52,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:52,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:50:52,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:50:52,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:52,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:50:52,383 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:50:52,425 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-06-05 21:50:52,425 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:50:52,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 21:50:52,428 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:50:52,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:50:52,443 INFO L518 ElimStorePlain]: Eliminatee v_prenex_15 vanished before elimination [2021-06-05 21:50:52,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:50:52,445 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 21:50:52,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:52,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024889064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:52,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:52,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:50:52,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812366312] [2021-06-05 21:50:52,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:50:52,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:52,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:50:52,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:50:52,475 INFO L87 Difference]: Start difference. First operand 60 states and 126 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:52,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:52,980 INFO L93 Difference]: Finished difference Result 102 states and 195 transitions. [2021-06-05 21:50:52,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:50:52,981 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:50:52,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:52,981 INFO L225 Difference]: With dead ends: 102 [2021-06-05 21:50:52,981 INFO L226 Difference]: Without dead ends: 99 [2021-06-05 21:50:52,982 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 513.1ms TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:50:52,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-06-05 21:50:52,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 65. [2021-06-05 21:50:52,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.140625) internal successors, (137), 64 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:52,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 137 transitions. [2021-06-05 21:50:52,983 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 137 transitions. Word has length 15 [2021-06-05 21:50:52,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:52,983 INFO L482 AbstractCegarLoop]: Abstraction has 65 states and 137 transitions. [2021-06-05 21:50:52,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:52,983 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 137 transitions. [2021-06-05 21:50:52,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:50:52,984 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:52,984 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:53,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:53,193 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:53,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:53,193 INFO L82 PathProgramCache]: Analyzing trace with hash 160078342, now seen corresponding path program 15 times [2021-06-05 21:50:53,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:53,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294588551] [2021-06-05 21:50:53,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:53,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:53,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:53,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:53,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294588551] [2021-06-05 21:50:53,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294588551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:53,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500276359] [2021-06-05 21:50:53,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 21:50:53,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 21:50:53,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:50:53,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:53,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:53,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:53,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:53,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:50:53,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:50:53,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:53,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:50:53,380 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:50:53,429 INFO L628 ElimStorePlain]: treesize reduction 80, result has 35.0 percent of original size [2021-06-05 21:50:53,429 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:50:53,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 21:50:53,433 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:50:53,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:50:53,450 INFO L518 ElimStorePlain]: Eliminatee v_prenex_17 vanished before elimination [2021-06-05 21:50:53,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:50:53,452 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-06-05 21:50:53,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:53,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500276359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:53,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:53,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 21:50:53,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061810990] [2021-06-05 21:50:53,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:50:53,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:53,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:50:53,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:50:53,498 INFO L87 Difference]: Start difference. First operand 65 states and 137 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:53,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:53,647 INFO L93 Difference]: Finished difference Result 100 states and 201 transitions. [2021-06-05 21:50:53,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:50:53,647 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:50:53,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:53,648 INFO L225 Difference]: With dead ends: 100 [2021-06-05 21:50:53,648 INFO L226 Difference]: Without dead ends: 100 [2021-06-05 21:50:53,649 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 170.6ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:50:53,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-05 21:50:53,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 65. [2021-06-05 21:50:53,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.140625) internal successors, (137), 64 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:53,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 137 transitions. [2021-06-05 21:50:53,650 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 137 transitions. Word has length 15 [2021-06-05 21:50:53,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:53,650 INFO L482 AbstractCegarLoop]: Abstraction has 65 states and 137 transitions. [2021-06-05 21:50:53,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:53,650 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 137 transitions. [2021-06-05 21:50:53,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:50:53,651 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:53,651 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:53,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 21:50:53,865 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:53,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:53,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1520195082, now seen corresponding path program 16 times [2021-06-05 21:50:53,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:53,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488208551] [2021-06-05 21:50:53,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:53,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:53,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:53,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:53,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488208551] [2021-06-05 21:50:53,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488208551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:53,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76816618] [2021-06-05 21:50:53,936 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:53,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:50:53,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:50:53,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:50:53,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:54,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:54,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:54,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:50:54,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:50:54,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:54,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:50:54,070 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:50:54,107 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-06-05 21:50:54,107 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:50:54,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 21:50:54,110 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:50:54,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:50:54,123 INFO L518 ElimStorePlain]: Eliminatee v_prenex_20 vanished before elimination [2021-06-05 21:50:54,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:50:54,125 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 21:50:54,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:54,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76816618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:54,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:54,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:50:54,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214842779] [2021-06-05 21:50:54,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:50:54,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:54,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:50:54,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:50:54,149 INFO L87 Difference]: Start difference. First operand 65 states and 137 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:54,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:54,385 INFO L93 Difference]: Finished difference Result 87 states and 174 transitions. [2021-06-05 21:50:54,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:50:54,386 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:50:54,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:54,386 INFO L225 Difference]: With dead ends: 87 [2021-06-05 21:50:54,386 INFO L226 Difference]: Without dead ends: 87 [2021-06-05 21:50:54,386 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 279.8ms TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:50:54,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-06-05 21:50:54,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 61. [2021-06-05 21:50:54,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.1333333333333333) internal successors, (128), 60 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:54,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 128 transitions. [2021-06-05 21:50:54,388 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 128 transitions. Word has length 15 [2021-06-05 21:50:54,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:54,388 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 128 transitions. [2021-06-05 21:50:54,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:54,388 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 128 transitions. [2021-06-05 21:50:54,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:50:54,388 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:54,388 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:54,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:54,604 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:54,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:54,605 INFO L82 PathProgramCache]: Analyzing trace with hash -920894394, now seen corresponding path program 17 times [2021-06-05 21:50:54,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:54,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725072156] [2021-06-05 21:50:54,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:54,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:54,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:54,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:54,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725072156] [2021-06-05 21:50:54,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725072156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:54,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96573774] [2021-06-05 21:50:54,659 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:54,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:50:54,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:50:54,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:50:54,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:54,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:54,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96573774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:54,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:54,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:50:54,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58019755] [2021-06-05 21:50:54,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:50:54,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:54,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:50:54,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:50:54,781 INFO L87 Difference]: Start difference. First operand 61 states and 128 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:54,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:54,931 INFO L93 Difference]: Finished difference Result 71 states and 144 transitions. [2021-06-05 21:50:54,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:50:54,931 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:50:54,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:54,932 INFO L225 Difference]: With dead ends: 71 [2021-06-05 21:50:54,932 INFO L226 Difference]: Without dead ends: 65 [2021-06-05 21:50:54,932 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 183.5ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:50:54,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-06-05 21:50:54,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2021-06-05 21:50:54,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.1311475409836067) internal successors, (130), 61 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:54,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 130 transitions. [2021-06-05 21:50:54,934 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 130 transitions. Word has length 15 [2021-06-05 21:50:54,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:54,934 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 130 transitions. [2021-06-05 21:50:54,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:54,934 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 130 transitions. [2021-06-05 21:50:54,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:50:54,935 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:54,935 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:55,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-05 21:50:55,145 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:55,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:55,145 INFO L82 PathProgramCache]: Analyzing trace with hash 727164690, now seen corresponding path program 18 times [2021-06-05 21:50:55,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:55,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692682147] [2021-06-05 21:50:55,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:55,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:55,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:55,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:55,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692682147] [2021-06-05 21:50:55,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692682147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:55,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954942157] [2021-06-05 21:50:55,195 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:55,219 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 21:50:55,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:50:55,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:50:55,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:55,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:55,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:55,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:50:55,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:50:55,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:55,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:50:55,304 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:50:55,328 INFO L628 ElimStorePlain]: treesize reduction 36, result has 29.4 percent of original size [2021-06-05 21:50:55,329 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:50:55,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:50:55,330 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 21:50:55,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:55,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954942157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:55,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:55,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 21:50:55,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313087910] [2021-06-05 21:50:55,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:50:55,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:55,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:50:55,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:50:55,343 INFO L87 Difference]: Start difference. First operand 62 states and 130 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:55,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:55,378 INFO L93 Difference]: Finished difference Result 73 states and 152 transitions. [2021-06-05 21:50:55,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:50:55,378 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:50:55,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:55,379 INFO L225 Difference]: With dead ends: 73 [2021-06-05 21:50:55,379 INFO L226 Difference]: Without dead ends: 73 [2021-06-05 21:50:55,379 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 76.5ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:50:55,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-06-05 21:50:55,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2021-06-05 21:50:55,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.1311475409836067) internal successors, (130), 61 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:55,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 130 transitions. [2021-06-05 21:50:55,380 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 130 transitions. Word has length 15 [2021-06-05 21:50:55,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:55,381 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 130 transitions. [2021-06-05 21:50:55,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:55,381 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 130 transitions. [2021-06-05 21:50:55,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:50:55,381 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:55,381 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:55,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-06-05 21:50:55,589 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:55,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:55,589 INFO L82 PathProgramCache]: Analyzing trace with hash -58889330, now seen corresponding path program 19 times [2021-06-05 21:50:55,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:55,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144596655] [2021-06-05 21:50:55,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:55,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:55,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:55,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:55,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144596655] [2021-06-05 21:50:55,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144596655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:55,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704619339] [2021-06-05 21:50:55,640 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:55,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:55,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:50:55,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:55,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:55,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:55,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:50:55,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:50:55,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:55,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:50:55,758 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:50:55,794 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-06-05 21:50:55,794 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:50:55,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 21:50:55,797 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:50:55,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:50:55,810 INFO L518 ElimStorePlain]: Eliminatee v_prenex_22 vanished before elimination [2021-06-05 21:50:55,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:50:55,811 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 21:50:55,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:55,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704619339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:55,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:55,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:50:55,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245441861] [2021-06-05 21:50:55,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:50:55,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:55,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:50:55,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:50:55,841 INFO L87 Difference]: Start difference. First operand 62 states and 130 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:56,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:56,017 INFO L93 Difference]: Finished difference Result 84 states and 165 transitions. [2021-06-05 21:50:56,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:50:56,017 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:50:56,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:56,018 INFO L225 Difference]: With dead ends: 84 [2021-06-05 21:50:56,018 INFO L226 Difference]: Without dead ends: 81 [2021-06-05 21:50:56,018 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 192.9ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:50:56,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-05 21:50:56,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 67. [2021-06-05 21:50:56,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.1363636363636362) internal successors, (141), 66 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:56,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 141 transitions. [2021-06-05 21:50:56,020 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 141 transitions. Word has length 15 [2021-06-05 21:50:56,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:56,020 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 141 transitions. [2021-06-05 21:50:56,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:56,020 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 141 transitions. [2021-06-05 21:50:56,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:50:56,020 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:56,020 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:56,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:56,229 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:56,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:56,229 INFO L82 PathProgramCache]: Analyzing trace with hash -282820798, now seen corresponding path program 20 times [2021-06-05 21:50:56,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:56,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685199425] [2021-06-05 21:50:56,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:56,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:56,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:56,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:56,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685199425] [2021-06-05 21:50:56,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685199425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:56,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152747377] [2021-06-05 21:50:56,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:56,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:50:56,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:50:56,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:50:56,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:56,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:56,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:56,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:50:56,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:50:56,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:56,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:50:56,401 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:50:56,446 INFO L628 ElimStorePlain]: treesize reduction 78, result has 35.5 percent of original size [2021-06-05 21:50:56,446 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:50:56,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 21:50:56,452 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:50:56,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:50:56,468 INFO L518 ElimStorePlain]: Eliminatee v_prenex_26 vanished before elimination [2021-06-05 21:50:56,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:50:56,470 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-06-05 21:50:56,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:56,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152747377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:56,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:56,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 21:50:56,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397927196] [2021-06-05 21:50:56,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:50:56,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:56,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:50:56,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:50:56,514 INFO L87 Difference]: Start difference. First operand 67 states and 141 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:56,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:56,563 INFO L93 Difference]: Finished difference Result 86 states and 179 transitions. [2021-06-05 21:50:56,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:50:56,563 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:50:56,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:56,564 INFO L225 Difference]: With dead ends: 86 [2021-06-05 21:50:56,564 INFO L226 Difference]: Without dead ends: 86 [2021-06-05 21:50:56,564 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 89.1ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:50:56,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-06-05 21:50:56,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 67. [2021-06-05 21:50:56,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.1363636363636362) internal successors, (141), 66 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:56,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 141 transitions. [2021-06-05 21:50:56,565 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 141 transitions. Word has length 15 [2021-06-05 21:50:56,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:56,565 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 141 transitions. [2021-06-05 21:50:56,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:56,566 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 141 transitions. [2021-06-05 21:50:56,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:50:56,566 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:56,566 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:56,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-06-05 21:50:56,777 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:56,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:56,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1077295942, now seen corresponding path program 21 times [2021-06-05 21:50:56,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:56,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550294891] [2021-06-05 21:50:56,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:56,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:56,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:56,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:56,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550294891] [2021-06-05 21:50:56,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550294891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:56,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036435509] [2021-06-05 21:50:56,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:56,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:50:56,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:50:56,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:50:56,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:56,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:56,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:56,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:50:56,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:50:56,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:56,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:50:56,950 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:50:56,988 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-06-05 21:50:56,989 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:50:56,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 21:50:56,992 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:50:57,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:50:57,009 INFO L518 ElimStorePlain]: Eliminatee v_prenex_28 vanished before elimination [2021-06-05 21:50:57,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:50:57,010 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 21:50:57,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:57,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036435509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:57,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:57,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:50:57,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667783421] [2021-06-05 21:50:57,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:50:57,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:57,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:50:57,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:50:57,038 INFO L87 Difference]: Start difference. First operand 67 states and 141 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:57,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:57,141 INFO L93 Difference]: Finished difference Result 69 states and 144 transitions. [2021-06-05 21:50:57,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:50:57,141 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:50:57,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:57,142 INFO L225 Difference]: With dead ends: 69 [2021-06-05 21:50:57,142 INFO L226 Difference]: Without dead ends: 69 [2021-06-05 21:50:57,142 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 134.2ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:50:57,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-06-05 21:50:57,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 61. [2021-06-05 21:50:57,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.1333333333333333) internal successors, (128), 60 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:57,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 128 transitions. [2021-06-05 21:50:57,143 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 128 transitions. Word has length 15 [2021-06-05 21:50:57,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:57,144 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 128 transitions. [2021-06-05 21:50:57,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:57,144 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 128 transitions. [2021-06-05 21:50:57,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:50:57,144 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:57,144 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:57,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-06-05 21:50:57,358 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:57,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:57,358 INFO L82 PathProgramCache]: Analyzing trace with hash 2129293846, now seen corresponding path program 22 times [2021-06-05 21:50:57,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:57,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856389861] [2021-06-05 21:50:57,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:57,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:57,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:57,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:57,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856389861] [2021-06-05 21:50:57,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856389861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:57,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906143214] [2021-06-05 21:50:57,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:57,429 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:50:57,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:50:57,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:50:57,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:57,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:57,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:57,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:50:57,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:50:57,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:57,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:57,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:50:57,517 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:50:57,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:57,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:57,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:50:57,520 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:50:57,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:57,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:50:57,524 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:50:57,556 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 21:50:57,556 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:50:57,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:50:57,557 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 21:50:57,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:57,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906143214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:57,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:57,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:50:57,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552447156] [2021-06-05 21:50:57,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:50:57,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:57,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:50:57,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:50:57,591 INFO L87 Difference]: Start difference. First operand 61 states and 128 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:57,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:57,706 INFO L93 Difference]: Finished difference Result 89 states and 172 transitions. [2021-06-05 21:50:57,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:50:57,707 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:50:57,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:57,707 INFO L225 Difference]: With dead ends: 89 [2021-06-05 21:50:57,707 INFO L226 Difference]: Without dead ends: 86 [2021-06-05 21:50:57,707 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 125.9ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:50:57,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-06-05 21:50:57,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 66. [2021-06-05 21:50:57,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.1384615384615384) internal successors, (139), 65 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:57,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 139 transitions. [2021-06-05 21:50:57,709 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 139 transitions. Word has length 15 [2021-06-05 21:50:57,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:57,709 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 139 transitions. [2021-06-05 21:50:57,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:57,709 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 139 transitions. [2021-06-05 21:50:57,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:50:57,709 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:57,709 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:57,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:57,916 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:57,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:57,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1739535948, now seen corresponding path program 23 times [2021-06-05 21:50:57,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:57,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343966174] [2021-06-05 21:50:57,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:57,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:57,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:57,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:57,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343966174] [2021-06-05 21:50:57,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343966174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:57,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378344441] [2021-06-05 21:50:57,964 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:57,989 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:50:57,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:50:57,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:50:57,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:58,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:58,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378344441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:58,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:58,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:50:58,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094481826] [2021-06-05 21:50:58,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:50:58,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:58,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:50:58,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:50:58,064 INFO L87 Difference]: Start difference. First operand 66 states and 139 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:58,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:58,137 INFO L93 Difference]: Finished difference Result 91 states and 177 transitions. [2021-06-05 21:50:58,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:50:58,138 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:50:58,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:58,138 INFO L225 Difference]: With dead ends: 91 [2021-06-05 21:50:58,138 INFO L226 Difference]: Without dead ends: 91 [2021-06-05 21:50:58,138 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 104.1ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:50:58,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-05 21:50:58,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 64. [2021-06-05 21:50:58,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 63 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:58,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 131 transitions. [2021-06-05 21:50:58,140 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 131 transitions. Word has length 15 [2021-06-05 21:50:58,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:58,140 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 131 transitions. [2021-06-05 21:50:58,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:58,140 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 131 transitions. [2021-06-05 21:50:58,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:50:58,140 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:58,140 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:58,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-06-05 21:50:58,357 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:58,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:58,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1029488178, now seen corresponding path program 24 times [2021-06-05 21:50:58,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:58,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355496235] [2021-06-05 21:50:58,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:58,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:58,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:58,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:58,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355496235] [2021-06-05 21:50:58,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355496235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:58,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612342936] [2021-06-05 21:50:58,430 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:58,471 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:50:58,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:50:58,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:50:58,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:58,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:58,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:58,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:50:58,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:50:58,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:58,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:58,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:50:58,613 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:50:58,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:58,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:58,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:50:58,617 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:50:58,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:58,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:50:58,620 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:50:58,660 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 21:50:58,660 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:50:58,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:50:58,661 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 21:50:58,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:58,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612342936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:58,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:58,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 21:50:58,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375597420] [2021-06-05 21:50:58,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:50:58,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:58,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:50:58,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:50:58,691 INFO L87 Difference]: Start difference. First operand 64 states and 131 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:58,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:58,823 INFO L93 Difference]: Finished difference Result 87 states and 167 transitions. [2021-06-05 21:50:58,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:50:58,823 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:50:58,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:58,824 INFO L225 Difference]: With dead ends: 87 [2021-06-05 21:50:58,824 INFO L226 Difference]: Without dead ends: 87 [2021-06-05 21:50:58,824 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 173.3ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:50:58,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-06-05 21:50:58,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 63. [2021-06-05 21:50:58,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.0806451612903225) internal successors, (129), 62 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:58,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 129 transitions. [2021-06-05 21:50:58,826 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 129 transitions. Word has length 15 [2021-06-05 21:50:58,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:58,826 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 129 transitions. [2021-06-05 21:50:58,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:58,826 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 129 transitions. [2021-06-05 21:50:58,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:50:58,826 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:58,826 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:59,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 21:50:59,036 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:59,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:59,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1032427124, now seen corresponding path program 25 times [2021-06-05 21:50:59,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:59,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326505184] [2021-06-05 21:50:59,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:59,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:59,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:59,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:59,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326505184] [2021-06-05 21:50:59,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326505184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:59,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851297095] [2021-06-05 21:50:59,098 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:59,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:59,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:50:59,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:59,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:59,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851297095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:59,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:59,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:50:59,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539998671] [2021-06-05 21:50:59,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:50:59,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:59,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:50:59,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:50:59,197 INFO L87 Difference]: Start difference. First operand 63 states and 129 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:59,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:59,340 INFO L93 Difference]: Finished difference Result 70 states and 139 transitions. [2021-06-05 21:50:59,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:50:59,343 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:50:59,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:59,343 INFO L225 Difference]: With dead ends: 70 [2021-06-05 21:50:59,343 INFO L226 Difference]: Without dead ends: 66 [2021-06-05 21:50:59,343 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 166.1ms TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:50:59,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-06-05 21:50:59,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2021-06-05 21:50:59,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.064516129032258) internal successors, (128), 62 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:59,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 128 transitions. [2021-06-05 21:50:59,345 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 128 transitions. Word has length 15 [2021-06-05 21:50:59,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:59,345 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 128 transitions. [2021-06-05 21:50:59,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:59,345 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 128 transitions. [2021-06-05 21:50:59,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:50:59,345 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:59,345 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:50:59,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 21:50:59,553 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:50:59,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:50:59,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1119308358, now seen corresponding path program 26 times [2021-06-05 21:50:59,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:50:59,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487358013] [2021-06-05 21:50:59,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:50:59,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:50:59,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:59,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:50:59,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487358013] [2021-06-05 21:50:59,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487358013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:59,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084736955] [2021-06-05 21:50:59,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:50:59,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:50:59,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:50:59,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:50:59,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:50:59,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:59,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:59,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:50:59,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:50:59,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:50:59,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:50:59,745 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:50:59,774 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-06-05 21:50:59,775 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:50:59,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:50:59,775 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-06-05 21:50:59,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:50:59,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084736955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:50:59,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:50:59,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:50:59,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273005058] [2021-06-05 21:50:59,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:50:59,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:50:59,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:50:59,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:50:59,783 INFO L87 Difference]: Start difference. First operand 63 states and 128 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:59,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:50:59,848 INFO L93 Difference]: Finished difference Result 70 states and 140 transitions. [2021-06-05 21:50:59,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:50:59,848 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:50:59,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:50:59,848 INFO L225 Difference]: With dead ends: 70 [2021-06-05 21:50:59,848 INFO L226 Difference]: Without dead ends: 70 [2021-06-05 21:50:59,849 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 67.6ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:50:59,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-06-05 21:50:59,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 59. [2021-06-05 21:50:59,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.0517241379310347) internal successors, (119), 58 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:59,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 119 transitions. [2021-06-05 21:50:59,852 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 119 transitions. Word has length 15 [2021-06-05 21:50:59,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:50:59,852 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 119 transitions. [2021-06-05 21:50:59,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:50:59,852 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 119 transitions. [2021-06-05 21:50:59,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:50:59,852 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:50:59,852 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:00,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-06-05 21:51:00,069 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:00,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:00,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1684129998, now seen corresponding path program 27 times [2021-06-05 21:51:00,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:00,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864709223] [2021-06-05 21:51:00,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:00,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:00,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:00,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:00,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864709223] [2021-06-05 21:51:00,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864709223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:00,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294747349] [2021-06-05 21:51:00,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:00,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 21:51:00,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:00,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:51:00,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:00,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:00,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294747349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:00,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:00,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:51:00,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464925806] [2021-06-05 21:51:00,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:51:00,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:00,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:51:00,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:51:00,324 INFO L87 Difference]: Start difference. First operand 59 states and 119 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:00,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:00,533 INFO L93 Difference]: Finished difference Result 69 states and 134 transitions. [2021-06-05 21:51:00,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:51:00,533 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:51:00,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:00,534 INFO L225 Difference]: With dead ends: 69 [2021-06-05 21:51:00,534 INFO L226 Difference]: Without dead ends: 63 [2021-06-05 21:51:00,535 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 211.6ms TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:51:00,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-06-05 21:51:00,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2021-06-05 21:51:00,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:00,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 118 transitions. [2021-06-05 21:51:00,537 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 118 transitions. Word has length 15 [2021-06-05 21:51:00,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:00,537 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 118 transitions. [2021-06-05 21:51:00,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:00,537 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 118 transitions. [2021-06-05 21:51:00,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:51:00,537 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:00,537 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:00,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:00,753 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:00,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:00,754 INFO L82 PathProgramCache]: Analyzing trace with hash -962778214, now seen corresponding path program 28 times [2021-06-05 21:51:00,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:00,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29913701] [2021-06-05 21:51:00,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:00,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:00,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:00,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:00,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29913701] [2021-06-05 21:51:00,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29913701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:00,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873435522] [2021-06-05 21:51:00,802 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:00,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:51:00,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:00,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:51:00,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:00,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:00,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:00,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:51:00,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:00,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:00,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:51:00,896 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:00,910 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-06-05 21:51:00,910 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:51:00,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:51:00,911 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-06-05 21:51:00,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:00,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873435522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:00,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:00,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:51:00,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964575587] [2021-06-05 21:51:00,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:51:00,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:00,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:51:00,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:51:00,916 INFO L87 Difference]: Start difference. First operand 59 states and 118 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:00,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:00,961 INFO L93 Difference]: Finished difference Result 67 states and 134 transitions. [2021-06-05 21:51:00,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:51:00,961 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:51:00,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:00,962 INFO L225 Difference]: With dead ends: 67 [2021-06-05 21:51:00,962 INFO L226 Difference]: Without dead ends: 67 [2021-06-05 21:51:00,962 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 65.7ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:51:00,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-06-05 21:51:00,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2021-06-05 21:51:00,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:00,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 118 transitions. [2021-06-05 21:51:00,963 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 118 transitions. Word has length 15 [2021-06-05 21:51:00,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:00,963 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 118 transitions. [2021-06-05 21:51:00,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:00,963 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 118 transitions. [2021-06-05 21:51:00,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:51:00,964 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:00,964 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:01,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 21:51:01,164 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:01,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:01,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1748832234, now seen corresponding path program 29 times [2021-06-05 21:51:01,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:01,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225311707] [2021-06-05 21:51:01,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:01,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:01,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:01,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:01,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225311707] [2021-06-05 21:51:01,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225311707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:01,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083798511] [2021-06-05 21:51:01,220 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:01,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:51:01,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:01,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:51:01,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:01,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:01,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083798511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:01,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:01,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:51:01,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145270143] [2021-06-05 21:51:01,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:51:01,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:01,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:51:01,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:51:01,349 INFO L87 Difference]: Start difference. First operand 59 states and 118 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:01,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:01,507 INFO L93 Difference]: Finished difference Result 77 states and 144 transitions. [2021-06-05 21:51:01,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:51:01,508 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:51:01,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:01,508 INFO L225 Difference]: With dead ends: 77 [2021-06-05 21:51:01,508 INFO L226 Difference]: Without dead ends: 74 [2021-06-05 21:51:01,508 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 170.0ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:51:01,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-06-05 21:51:01,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2021-06-05 21:51:01,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.032258064516129) internal successors, (126), 62 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:01,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 126 transitions. [2021-06-05 21:51:01,510 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 126 transitions. Word has length 15 [2021-06-05 21:51:01,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:01,510 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 126 transitions. [2021-06-05 21:51:01,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:01,510 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 126 transitions. [2021-06-05 21:51:01,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:51:01,511 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:01,511 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:01,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:01,713 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:01,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:01,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1972763702, now seen corresponding path program 30 times [2021-06-05 21:51:01,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:01,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243006220] [2021-06-05 21:51:01,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:01,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:01,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:01,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:01,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243006220] [2021-06-05 21:51:01,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243006220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:01,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732183611] [2021-06-05 21:51:01,766 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:01,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 21:51:01,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:01,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:51:01,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:01,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:01,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:01,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:51:01,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:01,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:01,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:01,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:51:01,843 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:01,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:01,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:01,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:51:01,848 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:01,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:01,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:51:01,851 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:01,893 INFO L628 ElimStorePlain]: treesize reduction 73, result has 38.7 percent of original size [2021-06-05 21:51:01,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:01,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:51:01,897 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:51:01,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:01,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:51:01,915 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:141, output treesize:22 [2021-06-05 21:51:01,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:01,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732183611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:01,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:01,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 21:51:01,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918657095] [2021-06-05 21:51:01,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:51:01,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:01,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:51:01,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:51:01,953 INFO L87 Difference]: Start difference. First operand 63 states and 126 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:02,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:02,030 INFO L93 Difference]: Finished difference Result 79 states and 158 transitions. [2021-06-05 21:51:02,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:51:02,030 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:51:02,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:02,031 INFO L225 Difference]: With dead ends: 79 [2021-06-05 21:51:02,031 INFO L226 Difference]: Without dead ends: 79 [2021-06-05 21:51:02,031 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 100.1ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:51:02,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-05 21:51:02,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 63. [2021-06-05 21:51:02,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.032258064516129) internal successors, (126), 62 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:02,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 126 transitions. [2021-06-05 21:51:02,033 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 126 transitions. Word has length 15 [2021-06-05 21:51:02,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:02,033 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 126 transitions. [2021-06-05 21:51:02,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:02,033 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 126 transitions. [2021-06-05 21:51:02,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:51:02,034 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:02,034 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:02,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:02,245 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:02,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:02,245 INFO L82 PathProgramCache]: Analyzing trace with hash -612646962, now seen corresponding path program 31 times [2021-06-05 21:51:02,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:02,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505557549] [2021-06-05 21:51:02,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:02,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:02,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:02,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:02,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505557549] [2021-06-05 21:51:02,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505557549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:02,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991806027] [2021-06-05 21:51:02,308 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:02,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:02,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:51:02,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:02,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:02,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991806027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:02,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:02,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:51:02,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012131846] [2021-06-05 21:51:02,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:51:02,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:02,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:51:02,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:51:02,404 INFO L87 Difference]: Start difference. First operand 63 states and 126 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:02,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:02,488 INFO L93 Difference]: Finished difference Result 62 states and 123 transitions. [2021-06-05 21:51:02,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:51:02,488 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:51:02,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:02,489 INFO L225 Difference]: With dead ends: 62 [2021-06-05 21:51:02,489 INFO L226 Difference]: Without dead ends: 62 [2021-06-05 21:51:02,489 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 114.5ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:51:02,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-06-05 21:51:02,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2021-06-05 21:51:02,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.017857142857143) internal successors, (113), 56 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:02,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 113 transitions. [2021-06-05 21:51:02,491 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 113 transitions. Word has length 15 [2021-06-05 21:51:02,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:02,491 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 113 transitions. [2021-06-05 21:51:02,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:02,491 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 113 transitions. [2021-06-05 21:51:02,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:51:02,492 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:02,492 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:02,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:02,701 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:02,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:02,701 INFO L82 PathProgramCache]: Analyzing trace with hash 439350942, now seen corresponding path program 32 times [2021-06-05 21:51:02,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:02,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290640766] [2021-06-05 21:51:02,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:02,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:02,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:02,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:02,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290640766] [2021-06-05 21:51:02,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290640766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:02,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056220908] [2021-06-05 21:51:02,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:02,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:51:02,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:02,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:51:02,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:02,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:02,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056220908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:02,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:02,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:51:02,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606597827] [2021-06-05 21:51:02,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:51:02,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:02,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:51:02,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:51:02,883 INFO L87 Difference]: Start difference. First operand 57 states and 113 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:02,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:02,974 INFO L93 Difference]: Finished difference Result 84 states and 158 transitions. [2021-06-05 21:51:02,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:51:02,975 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:51:02,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:02,975 INFO L225 Difference]: With dead ends: 84 [2021-06-05 21:51:02,975 INFO L226 Difference]: Without dead ends: 81 [2021-06-05 21:51:02,975 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 112.3ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:51:02,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-05 21:51:02,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 64. [2021-06-05 21:51:02,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 63 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:02,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 131 transitions. [2021-06-05 21:51:02,977 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 131 transitions. Word has length 15 [2021-06-05 21:51:02,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:02,977 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 131 transitions. [2021-06-05 21:51:02,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:02,977 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 131 transitions. [2021-06-05 21:51:02,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:51:02,977 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:02,977 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:03,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable174 [2021-06-05 21:51:03,178 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:03,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:03,178 INFO L82 PathProgramCache]: Analyzing trace with hash 215419474, now seen corresponding path program 33 times [2021-06-05 21:51:03,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:03,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656735202] [2021-06-05 21:51:03,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:03,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:03,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:03,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:03,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656735202] [2021-06-05 21:51:03,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656735202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:03,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122196971] [2021-06-05 21:51:03,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:03,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:51:03,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:03,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:51:03,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:03,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:03,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:03,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:51:03,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:03,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:03,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:51:03,356 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:03,398 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-06-05 21:51:03,398 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:51:03,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 21:51:03,401 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:03,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:03,418 INFO L518 ElimStorePlain]: Eliminatee v_prenex_31 vanished before elimination [2021-06-05 21:51:03,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:51:03,419 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 21:51:03,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:03,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122196971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:03,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:03,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:51:03,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433576626] [2021-06-05 21:51:03,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:51:03,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:03,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:51:03,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:51:03,445 INFO L87 Difference]: Start difference. First operand 64 states and 131 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:03,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:03,573 INFO L93 Difference]: Finished difference Result 83 states and 160 transitions. [2021-06-05 21:51:03,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:51:03,574 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:51:03,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:03,574 INFO L225 Difference]: With dead ends: 83 [2021-06-05 21:51:03,574 INFO L226 Difference]: Without dead ends: 83 [2021-06-05 21:51:03,574 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 149.8ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:51:03,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-06-05 21:51:03,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 64. [2021-06-05 21:51:03,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 63 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:03,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 131 transitions. [2021-06-05 21:51:03,576 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 131 transitions. Word has length 15 [2021-06-05 21:51:03,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:03,576 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 131 transitions. [2021-06-05 21:51:03,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:03,576 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 131 transitions. [2021-06-05 21:51:03,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:51:03,576 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:03,576 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:03,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:03,793 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:03,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:03,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1195371358, now seen corresponding path program 34 times [2021-06-05 21:51:03,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:03,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735551327] [2021-06-05 21:51:03,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:03,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:03,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:03,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:03,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735551327] [2021-06-05 21:51:03,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735551327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:03,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519609987] [2021-06-05 21:51:03,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:03,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:51:03,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:03,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:51:03,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:03,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:03,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:03,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:51:03,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:03,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:03,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:51:03,969 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:04,011 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-06-05 21:51:04,011 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:51:04,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 21:51:04,014 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:04,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:04,027 INFO L518 ElimStorePlain]: Eliminatee v_prenex_34 vanished before elimination [2021-06-05 21:51:04,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:51:04,028 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 21:51:04,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:04,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519609987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:04,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:04,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:51:04,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896541988] [2021-06-05 21:51:04,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:51:04,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:04,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:51:04,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:51:04,056 INFO L87 Difference]: Start difference. First operand 64 states and 131 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:04,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:04,216 INFO L93 Difference]: Finished difference Result 85 states and 161 transitions. [2021-06-05 21:51:04,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:51:04,216 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:51:04,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:04,216 INFO L225 Difference]: With dead ends: 85 [2021-06-05 21:51:04,217 INFO L226 Difference]: Without dead ends: 83 [2021-06-05 21:51:04,217 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 186.5ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:51:04,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-06-05 21:51:04,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 64. [2021-06-05 21:51:04,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.0634920634920637) internal successors, (130), 63 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:04,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 130 transitions. [2021-06-05 21:51:04,218 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 130 transitions. Word has length 15 [2021-06-05 21:51:04,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:04,218 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 130 transitions. [2021-06-05 21:51:04,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:04,218 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 130 transitions. [2021-06-05 21:51:04,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:51:04,218 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:04,219 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:04,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-06-05 21:51:04,433 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:04,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:04,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1575536214, now seen corresponding path program 35 times [2021-06-05 21:51:04,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:04,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774521380] [2021-06-05 21:51:04,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:04,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:04,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:04,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:04,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774521380] [2021-06-05 21:51:04,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774521380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:04,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487492227] [2021-06-05 21:51:04,478 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:04,501 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:51:04,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:04,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:51:04,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:04,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:04,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487492227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:04,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:04,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 21:51:04,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725811455] [2021-06-05 21:51:04,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:51:04,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:04,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:51:04,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:51:04,620 INFO L87 Difference]: Start difference. First operand 64 states and 130 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:04,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:04,738 INFO L93 Difference]: Finished difference Result 84 states and 160 transitions. [2021-06-05 21:51:04,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:51:04,738 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:51:04,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:04,739 INFO L225 Difference]: With dead ends: 84 [2021-06-05 21:51:04,739 INFO L226 Difference]: Without dead ends: 84 [2021-06-05 21:51:04,739 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 134.1ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:51:04,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-06-05 21:51:04,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 63. [2021-06-05 21:51:04,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.064516129032258) internal successors, (128), 62 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:04,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 128 transitions. [2021-06-05 21:51:04,740 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 128 transitions. Word has length 15 [2021-06-05 21:51:04,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:04,741 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 128 transitions. [2021-06-05 21:51:04,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:04,741 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 128 transitions. [2021-06-05 21:51:04,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:51:04,741 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:04,741 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:04,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-05 21:51:04,954 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:04,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:04,954 INFO L82 PathProgramCache]: Analyzing trace with hash -657515780, now seen corresponding path program 36 times [2021-06-05 21:51:04,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:04,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258036651] [2021-06-05 21:51:04,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:04,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:05,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:05,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:05,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258036651] [2021-06-05 21:51:05,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258036651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:05,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288248442] [2021-06-05 21:51:05,009 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:05,033 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 21:51:05,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:05,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:51:05,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:05,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:05,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288248442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:05,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:05,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:51:05,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067762131] [2021-06-05 21:51:05,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:51:05,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:05,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:51:05,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:51:05,123 INFO L87 Difference]: Start difference. First operand 63 states and 128 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:05,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:05,204 INFO L93 Difference]: Finished difference Result 67 states and 132 transitions. [2021-06-05 21:51:05,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:51:05,205 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:51:05,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:05,205 INFO L225 Difference]: With dead ends: 67 [2021-06-05 21:51:05,205 INFO L226 Difference]: Without dead ends: 63 [2021-06-05 21:51:05,205 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 115.1ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:51:05,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-06-05 21:51:05,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-06-05 21:51:05,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.0483870967741935) internal successors, (127), 62 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:05,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 127 transitions. [2021-06-05 21:51:05,206 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 127 transitions. Word has length 15 [2021-06-05 21:51:05,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:05,206 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 127 transitions. [2021-06-05 21:51:05,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:05,207 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 127 transitions. [2021-06-05 21:51:05,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:51:05,207 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:05,207 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:05,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-06-05 21:51:05,409 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:05,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:05,409 INFO L82 PathProgramCache]: Analyzing trace with hash -570634546, now seen corresponding path program 37 times [2021-06-05 21:51:05,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:05,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889806294] [2021-06-05 21:51:05,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:05,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:05,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:05,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:05,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889806294] [2021-06-05 21:51:05,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889806294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:05,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44817690] [2021-06-05 21:51:05,458 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:05,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:05,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:51:05,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:05,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:05,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44817690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:05,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:05,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:51:05,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950601193] [2021-06-05 21:51:05,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:51:05,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:05,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:51:05,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:51:05,564 INFO L87 Difference]: Start difference. First operand 63 states and 127 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:05,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:05,602 INFO L93 Difference]: Finished difference Result 67 states and 133 transitions. [2021-06-05 21:51:05,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:51:05,605 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:51:05,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:05,605 INFO L225 Difference]: With dead ends: 67 [2021-06-05 21:51:05,605 INFO L226 Difference]: Without dead ends: 67 [2021-06-05 21:51:05,605 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 62.6ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:51:05,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-06-05 21:51:05,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2021-06-05 21:51:05,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.018181818181818) internal successors, (111), 55 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:05,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 111 transitions. [2021-06-05 21:51:05,606 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 111 transitions. Word has length 15 [2021-06-05 21:51:05,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:05,606 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 111 transitions. [2021-06-05 21:51:05,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:05,606 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 111 transitions. [2021-06-05 21:51:05,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:51:05,607 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:05,607 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:05,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-06-05 21:51:05,821 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:05,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:05,821 INFO L82 PathProgramCache]: Analyzing trace with hash -889346478, now seen corresponding path program 38 times [2021-06-05 21:51:05,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:05,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106005177] [2021-06-05 21:51:05,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:05,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:05,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:05,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:05,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106005177] [2021-06-05 21:51:05,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106005177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:05,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385781979] [2021-06-05 21:51:05,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:05,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:51:05,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:05,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:51:05,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:05,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:05,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:05,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:51:05,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:05,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:05,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:51:05,986 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:06,034 INFO L628 ElimStorePlain]: treesize reduction 70, result has 41.2 percent of original size [2021-06-05 21:51:06,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:06,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 21:51:06,039 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:51:06,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:06,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 21:51:06,060 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:06,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:06,076 INFO L518 ElimStorePlain]: Eliminatee v_prenex_38 vanished before elimination [2021-06-05 21:51:06,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:51:06,077 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-06-05 21:51:06,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:06,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385781979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:06,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:06,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:51:06,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291661118] [2021-06-05 21:51:06,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:51:06,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:06,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:51:06,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:51:06,107 INFO L87 Difference]: Start difference. First operand 56 states and 111 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:06,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:06,265 INFO L93 Difference]: Finished difference Result 96 states and 176 transitions. [2021-06-05 21:51:06,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:51:06,266 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:51:06,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:06,266 INFO L225 Difference]: With dead ends: 96 [2021-06-05 21:51:06,266 INFO L226 Difference]: Without dead ends: 93 [2021-06-05 21:51:06,266 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 156.1ms TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:51:06,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-06-05 21:51:06,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2021-06-05 21:51:06,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.033333333333333) internal successors, (122), 60 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:06,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 122 transitions. [2021-06-05 21:51:06,268 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 122 transitions. Word has length 15 [2021-06-05 21:51:06,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:06,268 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 122 transitions. [2021-06-05 21:51:06,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:06,268 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 122 transitions. [2021-06-05 21:51:06,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:51:06,268 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:06,268 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:06,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:06,480 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:06,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:06,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1113277946, now seen corresponding path program 39 times [2021-06-05 21:51:06,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:06,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064955188] [2021-06-05 21:51:06,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:06,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:06,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:06,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:06,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064955188] [2021-06-05 21:51:06,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064955188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:06,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369806723] [2021-06-05 21:51:06,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:06,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:51:06,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:06,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:51:06,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:06,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:06,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:06,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:51:06,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:06,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:06,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:51:06,683 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:06,719 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-06-05 21:51:06,719 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:51:06,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 21:51:06,722 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:06,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:06,735 INFO L518 ElimStorePlain]: Eliminatee v_prenex_41 vanished before elimination [2021-06-05 21:51:06,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:51:06,748 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 21:51:06,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:06,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369806723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:06,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:06,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:51:06,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548931905] [2021-06-05 21:51:06,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:51:06,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:06,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:51:06,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:51:06,775 INFO L87 Difference]: Start difference. First operand 61 states and 122 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:07,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:07,044 INFO L93 Difference]: Finished difference Result 80 states and 151 transitions. [2021-06-05 21:51:07,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:51:07,044 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:51:07,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:07,045 INFO L225 Difference]: With dead ends: 80 [2021-06-05 21:51:07,045 INFO L226 Difference]: Without dead ends: 80 [2021-06-05 21:51:07,045 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 317.1ms TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:51:07,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-05 21:51:07,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 61. [2021-06-05 21:51:07,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.033333333333333) internal successors, (122), 60 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:07,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 122 transitions. [2021-06-05 21:51:07,046 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 122 transitions. Word has length 15 [2021-06-05 21:51:07,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:07,046 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 122 transitions. [2021-06-05 21:51:07,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:07,046 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 122 transitions. [2021-06-05 21:51:07,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:51:07,046 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:07,046 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:07,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-06-05 21:51:07,247 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:07,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:07,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1770898518, now seen corresponding path program 40 times [2021-06-05 21:51:07,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:07,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464382946] [2021-06-05 21:51:07,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:07,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:07,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:07,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:07,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464382946] [2021-06-05 21:51:07,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464382946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:07,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406455887] [2021-06-05 21:51:07,304 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:07,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:51:07,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:07,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:51:07,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:07,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:07,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:07,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:51:07,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:07,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:07,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:51:07,428 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:07,464 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-06-05 21:51:07,464 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:51:07,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 21:51:07,467 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:07,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:07,479 INFO L518 ElimStorePlain]: Eliminatee v_prenex_44 vanished before elimination [2021-06-05 21:51:07,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:51:07,480 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 21:51:07,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:07,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406455887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:07,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:07,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:51:07,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620060282] [2021-06-05 21:51:07,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:51:07,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:07,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:51:07,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:51:07,504 INFO L87 Difference]: Start difference. First operand 61 states and 122 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:07,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:07,898 INFO L93 Difference]: Finished difference Result 82 states and 152 transitions. [2021-06-05 21:51:07,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:51:07,899 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:51:07,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:07,899 INFO L225 Difference]: With dead ends: 82 [2021-06-05 21:51:07,899 INFO L226 Difference]: Without dead ends: 80 [2021-06-05 21:51:07,899 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 417.7ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:51:07,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-05 21:51:07,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 61. [2021-06-05 21:51:07,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.0166666666666666) internal successors, (121), 60 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:07,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 121 transitions. [2021-06-05 21:51:07,901 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 121 transitions. Word has length 15 [2021-06-05 21:51:07,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:07,901 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 121 transitions. [2021-06-05 21:51:07,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:07,901 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 121 transitions. [2021-06-05 21:51:07,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:51:07,901 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:07,901 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:08,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:08,109 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:08,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:08,112 INFO L82 PathProgramCache]: Analyzing trace with hash 246838794, now seen corresponding path program 41 times [2021-06-05 21:51:08,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:08,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261949698] [2021-06-05 21:51:08,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:08,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:08,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:08,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:08,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261949698] [2021-06-05 21:51:08,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261949698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:08,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754866026] [2021-06-05 21:51:08,153 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:08,176 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:51:08,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:08,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:51:08,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:08,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:08,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754866026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:08,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:08,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:51:08,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948957198] [2021-06-05 21:51:08,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:51:08,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:08,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:51:08,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:51:08,304 INFO L87 Difference]: Start difference. First operand 61 states and 121 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:08,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:08,423 INFO L93 Difference]: Finished difference Result 92 states and 166 transitions. [2021-06-05 21:51:08,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:51:08,423 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:51:08,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:08,424 INFO L225 Difference]: With dead ends: 92 [2021-06-05 21:51:08,424 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 21:51:08,424 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 150.1ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:51:08,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 21:51:08,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2021-06-05 21:51:08,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:08,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 119 transitions. [2021-06-05 21:51:08,425 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 119 transitions. Word has length 15 [2021-06-05 21:51:08,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:08,425 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 119 transitions. [2021-06-05 21:51:08,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:08,425 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 119 transitions. [2021-06-05 21:51:08,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:51:08,425 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:08,425 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:08,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:08,626 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:08,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:08,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1986213200, now seen corresponding path program 42 times [2021-06-05 21:51:08,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:08,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189616773] [2021-06-05 21:51:08,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:08,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:08,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:08,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:08,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189616773] [2021-06-05 21:51:08,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189616773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:08,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769670787] [2021-06-05 21:51:08,688 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:08,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 21:51:08,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:08,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:51:08,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:08,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:08,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769670787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:08,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:08,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:51:08,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10157767] [2021-06-05 21:51:08,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:51:08,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:08,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:51:08,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:51:08,815 INFO L87 Difference]: Start difference. First operand 60 states and 119 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:08,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:08,906 INFO L93 Difference]: Finished difference Result 79 states and 144 transitions. [2021-06-05 21:51:08,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:51:08,906 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:51:08,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:08,907 INFO L225 Difference]: With dead ends: 79 [2021-06-05 21:51:08,907 INFO L226 Difference]: Without dead ends: 75 [2021-06-05 21:51:08,907 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 138.4ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:51:08,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-06-05 21:51:08,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 60. [2021-06-05 21:51:08,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.0) internal successors, (118), 59 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:08,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 118 transitions. [2021-06-05 21:51:08,908 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 118 transitions. Word has length 15 [2021-06-05 21:51:08,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:08,908 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 118 transitions. [2021-06-05 21:51:08,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:08,908 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 118 transitions. [2021-06-05 21:51:08,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:51:08,908 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:08,908 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:09,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:09,129 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:09,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:09,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1899331966, now seen corresponding path program 43 times [2021-06-05 21:51:09,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:09,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515737129] [2021-06-05 21:51:09,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:09,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:09,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:09,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:09,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515737129] [2021-06-05 21:51:09,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515737129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:09,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603949536] [2021-06-05 21:51:09,179 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:09,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:09,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:51:09,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:09,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:09,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603949536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:09,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:09,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:51:09,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052012002] [2021-06-05 21:51:09,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:51:09,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:09,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:51:09,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:51:09,301 INFO L87 Difference]: Start difference. First operand 60 states and 118 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:09,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:09,399 INFO L93 Difference]: Finished difference Result 89 states and 166 transitions. [2021-06-05 21:51:09,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:51:09,400 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:51:09,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:09,400 INFO L225 Difference]: With dead ends: 89 [2021-06-05 21:51:09,400 INFO L226 Difference]: Without dead ends: 89 [2021-06-05 21:51:09,400 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 124.9ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:51:09,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-05 21:51:09,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 59. [2021-06-05 21:51:09,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.0) internal successors, (116), 58 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:09,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 116 transitions. [2021-06-05 21:51:09,401 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 116 transitions. Word has length 15 [2021-06-05 21:51:09,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:09,402 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 116 transitions. [2021-06-05 21:51:09,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:09,402 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 116 transitions. [2021-06-05 21:51:09,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:51:09,402 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:09,402 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:09,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-06-05 21:51:09,613 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:09,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:09,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1398467878, now seen corresponding path program 44 times [2021-06-05 21:51:09,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:09,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673811624] [2021-06-05 21:51:09,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:09,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:09,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:09,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:09,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673811624] [2021-06-05 21:51:09,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673811624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:09,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726269570] [2021-06-05 21:51:09,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:09,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:51:09,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:09,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:51:09,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:09,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:09,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726269570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:09,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:09,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:51:09,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102360964] [2021-06-05 21:51:09,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:51:09,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:09,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:51:09,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:51:09,736 INFO L87 Difference]: Start difference. First operand 59 states and 116 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:09,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:09,849 INFO L93 Difference]: Finished difference Result 63 states and 120 transitions. [2021-06-05 21:51:09,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:51:09,849 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:51:09,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:09,850 INFO L225 Difference]: With dead ends: 63 [2021-06-05 21:51:09,850 INFO L226 Difference]: Without dead ends: 57 [2021-06-05 21:51:09,850 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 142.8ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:51:09,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-06-05 21:51:09,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-06-05 21:51:09,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.0) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:09,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 112 transitions. [2021-06-05 21:51:09,851 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 112 transitions. Word has length 15 [2021-06-05 21:51:09,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:09,851 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 112 transitions. [2021-06-05 21:51:09,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:09,851 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 112 transitions. [2021-06-05 21:51:09,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:51:09,851 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:09,851 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:10,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2021-06-05 21:51:10,052 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:10,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:10,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1382942798, now seen corresponding path program 45 times [2021-06-05 21:51:10,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:10,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350748725] [2021-06-05 21:51:10,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:10,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:10,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:10,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:10,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350748725] [2021-06-05 21:51:10,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350748725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:10,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177563951] [2021-06-05 21:51:10,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:10,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:51:10,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:10,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:51:10,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:10,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 21:51:10,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:10,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 21:51:10,174 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:10,188 INFO L628 ElimStorePlain]: treesize reduction 19, result has 38.7 percent of original size [2021-06-05 21:51:10,188 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:51:10,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:51:10,189 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:12 [2021-06-05 21:51:10,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:10,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177563951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:10,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:10,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:51:10,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880885880] [2021-06-05 21:51:10,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:51:10,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:10,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:51:10,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:51:10,205 INFO L87 Difference]: Start difference. First operand 57 states and 112 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:10,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:10,264 INFO L93 Difference]: Finished difference Result 64 states and 124 transitions. [2021-06-05 21:51:10,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:51:10,265 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:51:10,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:10,265 INFO L225 Difference]: With dead ends: 64 [2021-06-05 21:51:10,265 INFO L226 Difference]: Without dead ends: 64 [2021-06-05 21:51:10,265 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 77.7ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:51:10,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-06-05 21:51:10,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 52. [2021-06-05 21:51:10,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 51 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:10,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 100 transitions. [2021-06-05 21:51:10,266 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 100 transitions. Word has length 15 [2021-06-05 21:51:10,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:10,266 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 100 transitions. [2021-06-05 21:51:10,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:10,266 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 100 transitions. [2021-06-05 21:51:10,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:51:10,266 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:10,266 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:10,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:10,467 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:10,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:10,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1355148170, now seen corresponding path program 46 times [2021-06-05 21:51:10,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:10,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630220299] [2021-06-05 21:51:10,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:10,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:10,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:10,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:10,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630220299] [2021-06-05 21:51:10,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630220299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:10,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763924782] [2021-06-05 21:51:10,619 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:10,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:51:10,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:10,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:51:10,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:10,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-06-05 21:51:10,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:10,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 21:51:10,734 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:10,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:10,746 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:51:10,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:51:10,747 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:76, output treesize:37 [2021-06-05 21:51:10,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:10,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763924782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:10,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:10,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 21:51:10,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082243804] [2021-06-05 21:51:10,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:51:10,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:10,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:51:10,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:51:10,798 INFO L87 Difference]: Start difference. First operand 52 states and 100 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:11,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:11,017 INFO L93 Difference]: Finished difference Result 98 states and 183 transitions. [2021-06-05 21:51:11,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:51:11,018 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:51:11,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:11,018 INFO L225 Difference]: With dead ends: 98 [2021-06-05 21:51:11,018 INFO L226 Difference]: Without dead ends: 91 [2021-06-05 21:51:11,018 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 346.8ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:51:11,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-05 21:51:11,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 62. [2021-06-05 21:51:11,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.9508196721311475) internal successors, (119), 61 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:11,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 119 transitions. [2021-06-05 21:51:11,020 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 119 transitions. Word has length 16 [2021-06-05 21:51:11,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:11,020 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 119 transitions. [2021-06-05 21:51:11,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:11,020 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 119 transitions. [2021-06-05 21:51:11,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:51:11,020 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:11,020 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:11,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:11,220 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:11,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:11,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1913206166, now seen corresponding path program 47 times [2021-06-05 21:51:11,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:11,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151620024] [2021-06-05 21:51:11,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:11,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:11,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:11,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:11,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151620024] [2021-06-05 21:51:11,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151620024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:11,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104849164] [2021-06-05 21:51:11,355 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:11,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:51:11,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:11,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:51:11,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:11,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:11,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:51:11,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:11,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:11,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:11,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:51:11,540 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:51:11,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:11,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:51:11,547 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2021-06-05 21:51:11,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:11,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104849164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:11,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:11,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 21:51:11,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925177937] [2021-06-05 21:51:11,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:51:11,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:11,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:51:11,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:51:11,588 INFO L87 Difference]: Start difference. First operand 62 states and 119 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:11,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:11,756 INFO L93 Difference]: Finished difference Result 102 states and 191 transitions. [2021-06-05 21:51:11,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:51:11,756 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:51:11,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:11,757 INFO L225 Difference]: With dead ends: 102 [2021-06-05 21:51:11,757 INFO L226 Difference]: Without dead ends: 95 [2021-06-05 21:51:11,757 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 302.5ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:51:11,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-06-05 21:51:11,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 63. [2021-06-05 21:51:11,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.967741935483871) internal successors, (122), 62 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:11,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 122 transitions. [2021-06-05 21:51:11,758 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 122 transitions. Word has length 16 [2021-06-05 21:51:11,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:11,758 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 122 transitions. [2021-06-05 21:51:11,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:11,758 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 122 transitions. [2021-06-05 21:51:11,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:51:11,758 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:11,759 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:11,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:11,977 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:11,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:11,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1051201102, now seen corresponding path program 48 times [2021-06-05 21:51:11,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:11,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301357657] [2021-06-05 21:51:11,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:11,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:12,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:12,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:12,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301357657] [2021-06-05 21:51:12,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301357657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:12,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472386784] [2021-06-05 21:51:12,173 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:12,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 21:51:12,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:12,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:51:12,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:12,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:12,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:51:12,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:12,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:12,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:12,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:51:12,362 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:51:12,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:12,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:51:12,369 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2021-06-05 21:51:12,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:12,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472386784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:12,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:12,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 21:51:12,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798107130] [2021-06-05 21:51:12,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:51:12,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:12,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:51:12,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:51:12,406 INFO L87 Difference]: Start difference. First operand 63 states and 122 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:12,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:12,599 INFO L93 Difference]: Finished difference Result 103 states and 194 transitions. [2021-06-05 21:51:12,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:51:12,599 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:51:12,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:12,600 INFO L225 Difference]: With dead ends: 103 [2021-06-05 21:51:12,600 INFO L226 Difference]: Without dead ends: 96 [2021-06-05 21:51:12,600 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 348.7ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:51:12,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-06-05 21:51:12,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 64. [2021-06-05 21:51:12,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.9841269841269842) internal successors, (125), 63 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:12,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 125 transitions. [2021-06-05 21:51:12,601 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 125 transitions. Word has length 16 [2021-06-05 21:51:12,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:12,601 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 125 transitions. [2021-06-05 21:51:12,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:12,601 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 125 transitions. [2021-06-05 21:51:12,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:51:12,601 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:12,601 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:12,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:12,802 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:12,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:12,802 INFO L82 PathProgramCache]: Analyzing trace with hash 84984170, now seen corresponding path program 49 times [2021-06-05 21:51:12,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:12,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498205175] [2021-06-05 21:51:12,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:12,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:12,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:12,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:12,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498205175] [2021-06-05 21:51:12,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498205175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:12,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682864231] [2021-06-05 21:51:12,980 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:13,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:13,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:51:13,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:13,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:13,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:51:13,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:13,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:13,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:13,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:51:13,173 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:51:13,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:13,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:13,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:51:13,197 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:13,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:13,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:13,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:51:13,220 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:51:13,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:13,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:51:13,240 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-06-05 21:51:13,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:13,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682864231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:13,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:13,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 21:51:13,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072362682] [2021-06-05 21:51:13,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:51:13,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:13,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:51:13,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:51:13,310 INFO L87 Difference]: Start difference. First operand 64 states and 125 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:13,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:13,646 INFO L93 Difference]: Finished difference Result 109 states and 210 transitions. [2021-06-05 21:51:13,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:51:13,646 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:51:13,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:13,647 INFO L225 Difference]: With dead ends: 109 [2021-06-05 21:51:13,647 INFO L226 Difference]: Without dead ends: 100 [2021-06-05 21:51:13,647 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 437.5ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:51:13,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-05 21:51:13,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 65. [2021-06-05 21:51:13,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.0) internal successors, (128), 64 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:13,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 128 transitions. [2021-06-05 21:51:13,648 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 128 transitions. Word has length 16 [2021-06-05 21:51:13,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:13,648 INFO L482 AbstractCegarLoop]: Abstraction has 65 states and 128 transitions. [2021-06-05 21:51:13,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:13,648 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 128 transitions. [2021-06-05 21:51:13,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:51:13,648 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:13,648 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:13,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-06-05 21:51:13,859 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:13,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:13,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1938861990, now seen corresponding path program 50 times [2021-06-05 21:51:13,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:13,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147230042] [2021-06-05 21:51:13,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:13,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:13,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:13,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:13,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147230042] [2021-06-05 21:51:13,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147230042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:13,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267533712] [2021-06-05 21:51:13,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:14,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:51:14,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:14,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:51:14,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:14,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:14,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:51:14,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:14,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:14,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:14,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:51:14,160 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:51:14,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:14,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:51:14,167 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2021-06-05 21:51:14,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:14,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267533712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:14,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:14,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 21:51:14,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378310296] [2021-06-05 21:51:14,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:51:14,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:14,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:51:14,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:51:14,202 INFO L87 Difference]: Start difference. First operand 65 states and 128 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:14,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:14,317 INFO L93 Difference]: Finished difference Result 83 states and 159 transitions. [2021-06-05 21:51:14,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:51:14,317 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:51:14,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:14,318 INFO L225 Difference]: With dead ends: 83 [2021-06-05 21:51:14,318 INFO L226 Difference]: Without dead ends: 76 [2021-06-05 21:51:14,318 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 239.4ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:51:14,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-06-05 21:51:14,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2021-06-05 21:51:14,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.015151515151515) internal successors, (133), 66 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:14,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 133 transitions. [2021-06-05 21:51:14,319 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 133 transitions. Word has length 16 [2021-06-05 21:51:14,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:14,319 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 133 transitions. [2021-06-05 21:51:14,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:14,319 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 133 transitions. [2021-06-05 21:51:14,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:51:14,319 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:14,319 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:14,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:14,520 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:14,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:14,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1494100242, now seen corresponding path program 51 times [2021-06-05 21:51:14,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:14,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132331250] [2021-06-05 21:51:14,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:14,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:14,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:14,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:14,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132331250] [2021-06-05 21:51:14,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132331250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:14,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064108579] [2021-06-05 21:51:14,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:14,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 21:51:14,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:14,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:51:14,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:14,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:14,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:51:14,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:14,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:14,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:14,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 21:51:14,883 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:14,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:14,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:51:14,889 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-06-05 21:51:14,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:14,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064108579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:14,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:14,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 21:51:14,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851890032] [2021-06-05 21:51:14,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:51:14,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:14,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:51:14,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:51:14,924 INFO L87 Difference]: Start difference. First operand 67 states and 133 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:15,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:15,154 INFO L93 Difference]: Finished difference Result 93 states and 181 transitions. [2021-06-05 21:51:15,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:51:15,155 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:51:15,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:15,155 INFO L225 Difference]: With dead ends: 93 [2021-06-05 21:51:15,155 INFO L226 Difference]: Without dead ends: 86 [2021-06-05 21:51:15,155 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 347.0ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:51:15,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-06-05 21:51:15,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 68. [2021-06-05 21:51:15,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.029850746268657) internal successors, (136), 67 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:15,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 136 transitions. [2021-06-05 21:51:15,156 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 136 transitions. Word has length 16 [2021-06-05 21:51:15,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:15,156 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 136 transitions. [2021-06-05 21:51:15,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:15,157 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 136 transitions. [2021-06-05 21:51:15,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:51:15,157 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:15,157 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:15,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:15,357 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:15,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:15,358 INFO L82 PathProgramCache]: Analyzing trace with hash -357914970, now seen corresponding path program 52 times [2021-06-05 21:51:15,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:15,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086534743] [2021-06-05 21:51:15,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:15,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:15,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:15,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:15,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086534743] [2021-06-05 21:51:15,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086534743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:15,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236788639] [2021-06-05 21:51:15,582 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:15,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:51:15,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:15,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:51:15,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:15,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:15,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:51:15,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:15,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:15,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:15,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:51:15,756 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:51:15,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:15,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:15,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:51:15,781 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:15,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:15,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:15,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:51:15,807 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:51:15,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:15,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:51:15,827 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-06-05 21:51:15,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:15,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236788639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:15,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:15,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 21:51:15,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957383052] [2021-06-05 21:51:15,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:51:15,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:15,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:51:15,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:51:15,913 INFO L87 Difference]: Start difference. First operand 68 states and 136 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:16,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:16,174 INFO L93 Difference]: Finished difference Result 93 states and 183 transitions. [2021-06-05 21:51:16,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:51:16,174 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:51:16,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:16,175 INFO L225 Difference]: With dead ends: 93 [2021-06-05 21:51:16,175 INFO L226 Difference]: Without dead ends: 84 [2021-06-05 21:51:16,175 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 441.7ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:51:16,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-06-05 21:51:16,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2021-06-05 21:51:16,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.0) internal successors, (130), 65 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:16,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 130 transitions. [2021-06-05 21:51:16,176 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 130 transitions. Word has length 16 [2021-06-05 21:51:16,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:16,176 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 130 transitions. [2021-06-05 21:51:16,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:16,176 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 130 transitions. [2021-06-05 21:51:16,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:51:16,177 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:16,177 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:16,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:16,381 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:16,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:16,381 INFO L82 PathProgramCache]: Analyzing trace with hash 694082934, now seen corresponding path program 53 times [2021-06-05 21:51:16,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:16,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490777885] [2021-06-05 21:51:16,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:16,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:16,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:16,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:16,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490777885] [2021-06-05 21:51:16,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490777885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:16,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202815919] [2021-06-05 21:51:16,513 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:16,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:51:16,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:16,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:51:16,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:16,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:16,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:51:16,655 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:16,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:16,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:16,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:51:16,664 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:51:16,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:16,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:51:16,671 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2021-06-05 21:51:16,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:16,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202815919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:16,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:16,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 21:51:16,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959684778] [2021-06-05 21:51:16,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:51:16,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:16,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:51:16,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:51:16,710 INFO L87 Difference]: Start difference. First operand 66 states and 130 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:16,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:16,954 INFO L93 Difference]: Finished difference Result 86 states and 169 transitions. [2021-06-05 21:51:16,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:51:16,955 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:51:16,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:16,955 INFO L225 Difference]: With dead ends: 86 [2021-06-05 21:51:16,955 INFO L226 Difference]: Without dead ends: 79 [2021-06-05 21:51:16,955 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 292.8ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:51:16,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-05 21:51:16,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2021-06-05 21:51:16,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 69 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:16,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 139 transitions. [2021-06-05 21:51:16,957 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 139 transitions. Word has length 16 [2021-06-05 21:51:16,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:16,957 INFO L482 AbstractCegarLoop]: Abstraction has 70 states and 139 transitions. [2021-06-05 21:51:16,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:16,957 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 139 transitions. [2021-06-05 21:51:16,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:51:16,957 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:16,957 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:17,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:17,169 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:17,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:17,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1830268206, now seen corresponding path program 54 times [2021-06-05 21:51:17,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:17,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197357075] [2021-06-05 21:51:17,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:17,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:17,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:17,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:17,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197357075] [2021-06-05 21:51:17,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197357075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:17,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702712510] [2021-06-05 21:51:17,331 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:17,355 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:51:17,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:17,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:51:17,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:17,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:17,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:51:17,438 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:17,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:17,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:17,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:51:17,464 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:51:17,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:17,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:17,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:51:17,489 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:17,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:17,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:17,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:51:17,513 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:51:17,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:17,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:51:17,533 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-06-05 21:51:17,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:17,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702712510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:17,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:17,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 21:51:17,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013433388] [2021-06-05 21:51:17,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:51:17,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:17,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:51:17,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:51:17,604 INFO L87 Difference]: Start difference. First operand 70 states and 139 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:17,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:17,979 INFO L93 Difference]: Finished difference Result 93 states and 183 transitions. [2021-06-05 21:51:17,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:51:17,979 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:51:17,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:17,980 INFO L225 Difference]: With dead ends: 93 [2021-06-05 21:51:17,980 INFO L226 Difference]: Without dead ends: 84 [2021-06-05 21:51:17,980 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 439.2ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:51:17,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-06-05 21:51:17,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 69. [2021-06-05 21:51:17,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.0) internal successors, (136), 68 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:17,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 136 transitions. [2021-06-05 21:51:17,981 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 136 transitions. Word has length 16 [2021-06-05 21:51:17,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:17,981 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 136 transitions. [2021-06-05 21:51:17,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:17,981 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 136 transitions. [2021-06-05 21:51:17,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:51:17,981 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:17,981 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:18,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2021-06-05 21:51:18,198 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:18,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:18,198 INFO L82 PathProgramCache]: Analyzing trace with hash -315902554, now seen corresponding path program 55 times [2021-06-05 21:51:18,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:18,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075128896] [2021-06-05 21:51:18,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:18,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:18,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:18,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:18,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075128896] [2021-06-05 21:51:18,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075128896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:18,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336574035] [2021-06-05 21:51:18,354 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:18,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:18,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:51:18,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:18,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:18,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:18,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:51:18,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:18,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:18,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:51:18,444 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:18,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:18,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:18,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:18,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:51:18,473 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:51:18,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:18,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:51:18,477 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:51:18,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:18,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:51:18,499 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 21:51:18,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:18,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336574035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:18,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:18,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 21:51:18,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38962149] [2021-06-05 21:51:18,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:51:18,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:18,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:51:18,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:51:18,578 INFO L87 Difference]: Start difference. First operand 69 states and 136 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:18,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:18,963 INFO L93 Difference]: Finished difference Result 94 states and 188 transitions. [2021-06-05 21:51:18,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:51:18,963 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:51:18,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:18,963 INFO L225 Difference]: With dead ends: 94 [2021-06-05 21:51:18,963 INFO L226 Difference]: Without dead ends: 85 [2021-06-05 21:51:18,963 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 456.6ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:51:18,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-06-05 21:51:18,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 70. [2021-06-05 21:51:18,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 69 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:18,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 139 transitions. [2021-06-05 21:51:18,965 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 139 transitions. Word has length 16 [2021-06-05 21:51:18,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:18,965 INFO L482 AbstractCegarLoop]: Abstraction has 70 states and 139 transitions. [2021-06-05 21:51:18,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:18,965 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 139 transitions. [2021-06-05 21:51:18,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:51:18,965 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:18,965 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:19,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:19,169 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:19,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:19,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1093890538, now seen corresponding path program 56 times [2021-06-05 21:51:19,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:19,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093249036] [2021-06-05 21:51:19,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:19,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:19,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:19,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:19,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093249036] [2021-06-05 21:51:19,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093249036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:19,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013001485] [2021-06-05 21:51:19,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:19,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:51:19,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:19,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:51:19,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:19,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:19,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:51:19,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:19,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:19,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:19,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:51:19,470 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:51:19,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:19,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:51:19,477 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-06-05 21:51:19,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:19,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013001485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:19,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:19,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:51:19,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521962047] [2021-06-05 21:51:19,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:51:19,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:19,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:51:19,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:51:19,512 INFO L87 Difference]: Start difference. First operand 70 states and 139 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:19,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:19,664 INFO L93 Difference]: Finished difference Result 89 states and 171 transitions. [2021-06-05 21:51:19,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:51:19,664 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:51:19,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:19,664 INFO L225 Difference]: With dead ends: 89 [2021-06-05 21:51:19,664 INFO L226 Difference]: Without dead ends: 82 [2021-06-05 21:51:19,664 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 248.7ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:51:19,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-06-05 21:51:19,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 71. [2021-06-05 21:51:19,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.0285714285714285) internal successors, (142), 70 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:19,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 142 transitions. [2021-06-05 21:51:19,666 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 142 transitions. Word has length 16 [2021-06-05 21:51:19,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:19,666 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 142 transitions. [2021-06-05 21:51:19,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:19,666 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 142 transitions. [2021-06-05 21:51:19,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:51:19,666 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:19,666 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:19,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:19,873 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:19,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:19,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1955895602, now seen corresponding path program 57 times [2021-06-05 21:51:19,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:19,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585880463] [2021-06-05 21:51:19,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:19,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:20,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:20,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:20,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585880463] [2021-06-05 21:51:20,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585880463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:20,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363979029] [2021-06-05 21:51:20,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:20,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 21:51:20,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:20,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:51:20,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:20,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:20,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:51:20,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:20,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:20,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:20,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:51:20,200 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:51:20,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:20,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:51:20,207 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2021-06-05 21:51:20,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:20,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363979029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:20,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:20,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:51:20,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284095056] [2021-06-05 21:51:20,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:51:20,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:20,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:51:20,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:51:20,243 INFO L87 Difference]: Start difference. First operand 71 states and 142 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:20,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:20,489 INFO L93 Difference]: Finished difference Result 99 states and 193 transitions. [2021-06-05 21:51:20,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:51:20,490 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:51:20,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:20,490 INFO L225 Difference]: With dead ends: 99 [2021-06-05 21:51:20,490 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 21:51:20,490 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 316.8ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:51:20,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 21:51:20,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 72. [2021-06-05 21:51:20,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.0422535211267605) internal successors, (145), 71 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:20,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 145 transitions. [2021-06-05 21:51:20,491 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 145 transitions. Word has length 16 [2021-06-05 21:51:20,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:20,492 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 145 transitions. [2021-06-05 21:51:20,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:20,492 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 145 transitions. [2021-06-05 21:51:20,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:51:20,492 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:20,492 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:20,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable310,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:20,708 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:20,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:20,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1202886422, now seen corresponding path program 58 times [2021-06-05 21:51:20,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:20,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224871069] [2021-06-05 21:51:20,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:20,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:20,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:20,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:20,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224871069] [2021-06-05 21:51:20,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224871069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:20,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911864886] [2021-06-05 21:51:20,935 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:20,961 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:51:20,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:20,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:51:20,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:21,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:21,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:51:21,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:21,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:21,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:21,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:51:21,121 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:51:21,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:21,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:21,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:51:21,148 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:21,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:21,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:21,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:51:21,173 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:51:21,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:21,193 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:51:21,193 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-06-05 21:51:21,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:21,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911864886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:21,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:21,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:51:21,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105282390] [2021-06-05 21:51:21,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:51:21,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:21,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:51:21,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:51:21,280 INFO L87 Difference]: Start difference. First operand 72 states and 145 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:21,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:21,614 INFO L93 Difference]: Finished difference Result 100 states and 197 transitions. [2021-06-05 21:51:21,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:51:21,615 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:51:21,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:21,615 INFO L225 Difference]: With dead ends: 100 [2021-06-05 21:51:21,615 INFO L226 Difference]: Without dead ends: 91 [2021-06-05 21:51:21,615 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 489.8ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:51:21,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-05 21:51:21,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 69. [2021-06-05 21:51:21,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.014705882352941) internal successors, (137), 68 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:21,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 137 transitions. [2021-06-05 21:51:21,617 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 137 transitions. Word has length 16 [2021-06-05 21:51:21,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:21,617 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 137 transitions. [2021-06-05 21:51:21,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:21,617 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 137 transitions. [2021-06-05 21:51:21,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:51:21,617 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:21,617 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:21,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2021-06-05 21:51:21,825 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:21,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:21,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1036686798, now seen corresponding path program 59 times [2021-06-05 21:51:21,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:21,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866886645] [2021-06-05 21:51:21,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:21,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:21,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:21,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:21,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866886645] [2021-06-05 21:51:21,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866886645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:21,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791064472] [2021-06-05 21:51:21,995 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:22,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:51:22,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:22,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:51:22,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:22,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:22,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:51:22,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:22,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:22,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:22,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 21:51:22,175 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:22,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:22,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:51:22,182 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-06-05 21:51:22,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:22,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791064472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:22,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:22,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:51:22,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755757218] [2021-06-05 21:51:22,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:51:22,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:22,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:51:22,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:51:22,217 INFO L87 Difference]: Start difference. First operand 69 states and 137 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:22,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:22,431 INFO L93 Difference]: Finished difference Result 91 states and 179 transitions. [2021-06-05 21:51:22,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:51:22,432 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:51:22,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:22,432 INFO L225 Difference]: With dead ends: 91 [2021-06-05 21:51:22,432 INFO L226 Difference]: Without dead ends: 84 [2021-06-05 21:51:22,432 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 315.4ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:51:22,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-06-05 21:51:22,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 72. [2021-06-05 21:51:22,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.028169014084507) internal successors, (144), 71 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:22,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 144 transitions. [2021-06-05 21:51:22,433 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 144 transitions. Word has length 16 [2021-06-05 21:51:22,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:22,433 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 144 transitions. [2021-06-05 21:51:22,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:22,434 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 144 transitions. [2021-06-05 21:51:22,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:51:22,434 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:22,434 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:22,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:22,634 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:22,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:22,635 INFO L82 PathProgramCache]: Analyzing trace with hash 99498474, now seen corresponding path program 60 times [2021-06-05 21:51:22,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:22,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069456950] [2021-06-05 21:51:22,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:22,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:22,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:22,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:22,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069456950] [2021-06-05 21:51:22,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069456950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:22,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490533133] [2021-06-05 21:51:22,793 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:22,816 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:51:22,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:22,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:51:22,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:22,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:22,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:22,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:51:22,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:22,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:22,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:51:22,889 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:22,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:22,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:22,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:22,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:51:22,916 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:51:22,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:22,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:51:22,921 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:51:22,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:22,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:51:22,942 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 21:51:23,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:23,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490533133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:23,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:23,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:51:23,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940539513] [2021-06-05 21:51:23,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:51:23,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:23,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:51:23,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:51:23,036 INFO L87 Difference]: Start difference. First operand 72 states and 144 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:23,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:23,262 INFO L93 Difference]: Finished difference Result 95 states and 186 transitions. [2021-06-05 21:51:23,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:51:23,262 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:51:23,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:23,263 INFO L225 Difference]: With dead ends: 95 [2021-06-05 21:51:23,263 INFO L226 Difference]: Without dead ends: 88 [2021-06-05 21:51:23,263 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 299.8ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:51:23,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-05 21:51:23,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 73. [2021-06-05 21:51:23,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.0555555555555554) internal successors, (148), 72 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:23,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 148 transitions. [2021-06-05 21:51:23,264 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 148 transitions. Word has length 16 [2021-06-05 21:51:23,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:23,264 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 148 transitions. [2021-06-05 21:51:23,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:23,264 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 148 transitions. [2021-06-05 21:51:23,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:51:23,264 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:23,264 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:23,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2021-06-05 21:51:23,473 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:23,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:23,473 INFO L82 PathProgramCache]: Analyzing trace with hash -2046672286, now seen corresponding path program 61 times [2021-06-05 21:51:23,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:23,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39091990] [2021-06-05 21:51:23,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:23,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:23,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:23,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:23,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39091990] [2021-06-05 21:51:23,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39091990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:23,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603766064] [2021-06-05 21:51:23,636 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:23,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:23,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:51:23,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:23,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:23,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:23,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:51:23,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:23,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:23,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:51:23,746 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:23,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:23,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:23,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:23,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:51:23,780 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:51:23,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:23,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:51:23,785 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:51:23,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:23,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:51:23,810 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 21:51:23,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:23,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603766064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:23,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:23,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:51:23,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094297417] [2021-06-05 21:51:23,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:51:23,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:23,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:51:23,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:51:23,890 INFO L87 Difference]: Start difference. First operand 73 states and 148 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:24,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:24,233 INFO L93 Difference]: Finished difference Result 98 states and 199 transitions. [2021-06-05 21:51:24,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:51:24,233 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:51:24,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:24,236 INFO L225 Difference]: With dead ends: 98 [2021-06-05 21:51:24,236 INFO L226 Difference]: Without dead ends: 89 [2021-06-05 21:51:24,237 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 467.7ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:51:24,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-05 21:51:24,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 73. [2021-06-05 21:51:24,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.0555555555555554) internal successors, (148), 72 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:24,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 148 transitions. [2021-06-05 21:51:24,238 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 148 transitions. Word has length 16 [2021-06-05 21:51:24,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:24,238 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 148 transitions. [2021-06-05 21:51:24,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:24,238 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 148 transitions. [2021-06-05 21:51:24,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:51:24,238 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:24,238 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:24,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:24,441 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:24,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:24,441 INFO L82 PathProgramCache]: Analyzing trace with hash 141510890, now seen corresponding path program 62 times [2021-06-05 21:51:24,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:24,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451487529] [2021-06-05 21:51:24,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:24,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:24,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:24,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:24,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451487529] [2021-06-05 21:51:24,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451487529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:24,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454753040] [2021-06-05 21:51:24,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:24,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:51:24,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:24,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:51:24,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:24,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:24,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:24,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:51:24,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:24,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:24,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:51:24,680 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:24,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:24,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:24,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:24,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:51:24,717 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:51:24,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:24,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:51:24,721 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:51:24,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:24,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:51:24,743 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 21:51:24,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:24,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454753040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:24,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:24,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:51:24,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703430934] [2021-06-05 21:51:24,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:51:24,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:24,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:51:24,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:51:24,824 INFO L87 Difference]: Start difference. First operand 73 states and 148 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:25,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:25,002 INFO L93 Difference]: Finished difference Result 103 states and 201 transitions. [2021-06-05 21:51:25,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:51:25,002 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:51:25,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:25,003 INFO L225 Difference]: With dead ends: 103 [2021-06-05 21:51:25,003 INFO L226 Difference]: Without dead ends: 89 [2021-06-05 21:51:25,003 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 287.2ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:51:25,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-05 21:51:25,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 77. [2021-06-05 21:51:25,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.0657894736842106) internal successors, (157), 76 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:25,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 157 transitions. [2021-06-05 21:51:25,004 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 157 transitions. Word has length 16 [2021-06-05 21:51:25,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:25,004 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 157 transitions. [2021-06-05 21:51:25,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:25,004 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 157 transitions. [2021-06-05 21:51:25,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:51:25,005 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:25,005 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:25,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:25,221 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:25,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:25,221 INFO L82 PathProgramCache]: Analyzing trace with hash 245268066, now seen corresponding path program 63 times [2021-06-05 21:51:25,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:25,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799995063] [2021-06-05 21:51:25,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:25,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:25,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:25,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:25,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799995063] [2021-06-05 21:51:25,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799995063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:25,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396983260] [2021-06-05 21:51:25,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:25,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 21:51:25,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:25,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:51:25,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:25,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:25,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:51:25,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:25,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:25,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:25,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 21:51:25,493 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:25,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:25,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:51:25,499 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-06-05 21:51:25,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:25,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396983260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:25,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:25,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:51:25,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652514811] [2021-06-05 21:51:25,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:51:25,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:25,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:51:25,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:51:25,533 INFO L87 Difference]: Start difference. First operand 77 states and 157 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:25,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:25,644 INFO L93 Difference]: Finished difference Result 97 states and 191 transitions. [2021-06-05 21:51:25,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:51:25,644 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:51:25,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:25,644 INFO L225 Difference]: With dead ends: 97 [2021-06-05 21:51:25,644 INFO L226 Difference]: Without dead ends: 90 [2021-06-05 21:51:25,645 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 242.8ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:51:25,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-05 21:51:25,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 78. [2021-06-05 21:51:25,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.0779220779220777) internal successors, (160), 77 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:25,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 160 transitions. [2021-06-05 21:51:25,646 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 160 transitions. Word has length 16 [2021-06-05 21:51:25,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:25,646 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 160 transitions. [2021-06-05 21:51:25,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:25,646 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 160 transitions. [2021-06-05 21:51:25,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:51:25,646 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:25,646 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:25,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable335,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:25,857 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:25,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:25,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1107273130, now seen corresponding path program 64 times [2021-06-05 21:51:25,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:25,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477305556] [2021-06-05 21:51:25,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:25,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:25,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:25,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:25,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477305556] [2021-06-05 21:51:25,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477305556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:25,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610362769] [2021-06-05 21:51:25,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:26,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:51:26,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:26,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:51:26,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:26,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:26,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:51:26,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:26,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:26,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:26,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 21:51:26,141 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:26,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:26,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:51:26,148 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-06-05 21:51:26,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:26,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610362769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:26,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:26,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 21:51:26,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565363992] [2021-06-05 21:51:26,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:51:26,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:26,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:51:26,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:51:26,179 INFO L87 Difference]: Start difference. First operand 78 states and 160 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:26,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:26,386 INFO L93 Difference]: Finished difference Result 107 states and 213 transitions. [2021-06-05 21:51:26,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:51:26,386 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:51:26,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:26,388 INFO L225 Difference]: With dead ends: 107 [2021-06-05 21:51:26,388 INFO L226 Difference]: Without dead ends: 100 [2021-06-05 21:51:26,388 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 282.6ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:51:26,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-05 21:51:26,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 79. [2021-06-05 21:51:26,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.08974358974359) internal successors, (163), 78 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:26,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 163 transitions. [2021-06-05 21:51:26,390 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 163 transitions. Word has length 16 [2021-06-05 21:51:26,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:26,390 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 163 transitions. [2021-06-05 21:51:26,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:26,390 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 163 transitions. [2021-06-05 21:51:26,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:51:26,390 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:26,390 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:26,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable336 [2021-06-05 21:51:26,605 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:26,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:26,605 INFO L82 PathProgramCache]: Analyzing trace with hash -2051508894, now seen corresponding path program 65 times [2021-06-05 21:51:26,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:26,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700421682] [2021-06-05 21:51:26,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:26,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:26,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:26,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:26,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700421682] [2021-06-05 21:51:26,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700421682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:26,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890604614] [2021-06-05 21:51:26,795 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:26,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:51:26,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:26,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:51:26,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:26,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:26,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:26,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:51:26,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:26,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:26,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:51:26,905 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:26,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:26,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:26,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:26,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:51:26,936 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:51:26,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:26,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:51:26,941 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:51:26,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:26,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:51:26,967 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 21:51:27,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:27,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890604614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:27,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:27,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:51:27,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203601366] [2021-06-05 21:51:27,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:51:27,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:27,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:51:27,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:51:27,063 INFO L87 Difference]: Start difference. First operand 79 states and 163 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:27,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:27,353 INFO L93 Difference]: Finished difference Result 105 states and 210 transitions. [2021-06-05 21:51:27,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:51:27,353 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:51:27,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:27,354 INFO L225 Difference]: With dead ends: 105 [2021-06-05 21:51:27,354 INFO L226 Difference]: Without dead ends: 98 [2021-06-05 21:51:27,354 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 410.9ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:51:27,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-06-05 21:51:27,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 78. [2021-06-05 21:51:27,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.0779220779220777) internal successors, (160), 77 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:27,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 160 transitions. [2021-06-05 21:51:27,355 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 160 transitions. Word has length 16 [2021-06-05 21:51:27,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:27,355 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 160 transitions. [2021-06-05 21:51:27,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:27,355 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 160 transitions. [2021-06-05 21:51:27,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:51:27,356 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:27,356 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:27,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2021-06-05 21:51:27,556 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:27,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:27,557 INFO L82 PathProgramCache]: Analyzing trace with hash -999510990, now seen corresponding path program 66 times [2021-06-05 21:51:27,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:27,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376303064] [2021-06-05 21:51:27,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:27,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:27,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:27,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:27,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376303064] [2021-06-05 21:51:27,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376303064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:27,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612114685] [2021-06-05 21:51:27,723 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 21:51:27,751 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 21:51:27,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:27,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:51:27,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:27,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:27,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:51:27,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:27,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:27,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:27,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 21:51:27,855 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:27,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:27,862 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:51:27,862 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-06-05 21:51:27,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:27,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612114685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:27,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:27,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:51:27,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778449518] [2021-06-05 21:51:27,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:51:27,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:27,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:51:27,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:51:27,895 INFO L87 Difference]: Start difference. First operand 78 states and 160 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:28,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:28,166 INFO L93 Difference]: Finished difference Result 99 states and 200 transitions. [2021-06-05 21:51:28,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:51:28,166 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:51:28,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:28,166 INFO L225 Difference]: With dead ends: 99 [2021-06-05 21:51:28,166 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 21:51:28,166 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 339.8ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:51:28,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 21:51:28,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2021-06-05 21:51:28,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.088607594936709) internal successors, (165), 79 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:28,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 165 transitions. [2021-06-05 21:51:28,168 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 165 transitions. Word has length 16 [2021-06-05 21:51:28,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:28,168 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 165 transitions. [2021-06-05 21:51:28,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:28,168 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 165 transitions. [2021-06-05 21:51:28,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:51:28,168 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:28,168 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:28,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2021-06-05 21:51:28,380 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:28,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:28,381 INFO L82 PathProgramCache]: Analyzing trace with hash 136674282, now seen corresponding path program 67 times [2021-06-05 21:51:28,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:28,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071750115] [2021-06-05 21:51:28,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:28,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:28,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:28,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:28,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071750115] [2021-06-05 21:51:28,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071750115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:28,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194335677] [2021-06-05 21:51:28,550 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:28,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:28,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:51:28,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:28,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:28,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:28,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:51:28,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:28,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:28,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:51:28,650 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:28,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:28,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:28,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:28,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:51:28,688 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:51:28,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:28,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:51:28,692 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:51:28,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:28,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:51:28,713 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 21:51:28,782 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:28,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194335677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:28,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:28,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:51:28,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516157065] [2021-06-05 21:51:28,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:51:28,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:28,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:51:28,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:51:28,783 INFO L87 Difference]: Start difference. First operand 80 states and 165 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:29,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:29,090 INFO L93 Difference]: Finished difference Result 105 states and 212 transitions. [2021-06-05 21:51:29,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:51:29,090 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:51:29,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:29,091 INFO L225 Difference]: With dead ends: 105 [2021-06-05 21:51:29,091 INFO L226 Difference]: Without dead ends: 96 [2021-06-05 21:51:29,091 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 430.2ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:51:29,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-06-05 21:51:29,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 79. [2021-06-05 21:51:29,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.076923076923077) internal successors, (162), 78 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:29,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 162 transitions. [2021-06-05 21:51:29,092 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 162 transitions. Word has length 16 [2021-06-05 21:51:29,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:29,092 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 162 transitions. [2021-06-05 21:51:29,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:29,092 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 162 transitions. [2021-06-05 21:51:29,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:51:29,092 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:29,093 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:29,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable343,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:29,309 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:29,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:29,309 INFO L82 PathProgramCache]: Analyzing trace with hash -2009496478, now seen corresponding path program 68 times [2021-06-05 21:51:29,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:29,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649565514] [2021-06-05 21:51:29,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:29,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:29,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:29,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:29,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649565514] [2021-06-05 21:51:29,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649565514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:29,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094570523] [2021-06-05 21:51:29,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:29,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:51:29,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:29,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:51:29,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:29,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:29,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:29,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:51:29,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:29,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:29,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:51:29,513 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:29,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:29,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:29,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:29,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:51:29,540 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:51:29,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:29,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:51:29,544 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:51:29,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:29,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:51:29,564 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 21:51:29,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:29,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094570523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:29,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:29,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:51:29,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739296021] [2021-06-05 21:51:29,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:51:29,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:29,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:51:29,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:51:29,631 INFO L87 Difference]: Start difference. First operand 79 states and 162 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:30,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:30,130 INFO L93 Difference]: Finished difference Result 148 states and 284 transitions. [2021-06-05 21:51:30,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:51:30,131 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:51:30,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:30,131 INFO L225 Difference]: With dead ends: 148 [2021-06-05 21:51:30,131 INFO L226 Difference]: Without dead ends: 125 [2021-06-05 21:51:30,131 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 469.9ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:51:30,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-06-05 21:51:30,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 83. [2021-06-05 21:51:30,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.1463414634146343) internal successors, (176), 82 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:30,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 176 transitions. [2021-06-05 21:51:30,136 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 176 transitions. Word has length 16 [2021-06-05 21:51:30,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:30,136 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 176 transitions. [2021-06-05 21:51:30,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:30,136 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 176 transitions. [2021-06-05 21:51:30,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:51:30,136 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:30,136 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:30,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable346 [2021-06-05 21:51:30,345 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:30,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:30,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1885309270, now seen corresponding path program 69 times [2021-06-05 21:51:30,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:30,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498699657] [2021-06-05 21:51:30,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:30,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:30,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:30,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:30,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498699657] [2021-06-05 21:51:30,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498699657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:30,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911516910] [2021-06-05 21:51:30,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:30,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:51:30,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:30,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:51:30,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:30,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:30,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:30,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:51:30,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:30,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:30,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:51:30,569 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:30,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:30,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:30,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:30,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:51:30,591 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:51:30,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:30,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:51:30,595 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:51:30,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:30,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:51:30,613 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:29 [2021-06-05 21:51:30,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:30,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911516910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:30,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:30,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:51:30,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957740098] [2021-06-05 21:51:30,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:51:30,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:30,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:51:30,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:51:30,661 INFO L87 Difference]: Start difference. First operand 83 states and 176 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:30,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:30,941 INFO L93 Difference]: Finished difference Result 105 states and 215 transitions. [2021-06-05 21:51:30,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:51:30,942 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:51:30,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:30,942 INFO L225 Difference]: With dead ends: 105 [2021-06-05 21:51:30,942 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 21:51:30,942 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 304.7ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:51:30,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 21:51:30,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 86. [2021-06-05 21:51:30,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.1411764705882352) internal successors, (182), 85 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:30,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 182 transitions. [2021-06-05 21:51:30,944 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 182 transitions. Word has length 16 [2021-06-05 21:51:30,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:30,944 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 182 transitions. [2021-06-05 21:51:30,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:30,944 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 182 transitions. [2021-06-05 21:51:30,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:51:30,944 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:30,944 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:31,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2021-06-05 21:51:31,144 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:31,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:31,145 INFO L82 PathProgramCache]: Analyzing trace with hash -749123998, now seen corresponding path program 70 times [2021-06-05 21:51:31,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:31,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266245571] [2021-06-05 21:51:31,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:31,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:31,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:31,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:31,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266245571] [2021-06-05 21:51:31,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266245571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:31,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277354608] [2021-06-05 21:51:31,332 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:31,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:51:31,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:31,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:51:31,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:31,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:31,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:31,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:51:31,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:31,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:31,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:51:31,431 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:31,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:31,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:31,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:31,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:51:31,457 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:51:31,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:31,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:51:31,460 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:51:31,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:31,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:51:31,482 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 21:51:31,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:31,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277354608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:31,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:31,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:51:31,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064576534] [2021-06-05 21:51:31,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:51:31,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:31,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:51:31,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:51:31,551 INFO L87 Difference]: Start difference. First operand 86 states and 182 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:31,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:31,879 INFO L93 Difference]: Finished difference Result 105 states and 219 transitions. [2021-06-05 21:51:31,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:51:31,879 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:51:31,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:31,880 INFO L225 Difference]: With dead ends: 105 [2021-06-05 21:51:31,880 INFO L226 Difference]: Without dead ends: 96 [2021-06-05 21:51:31,880 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 418.1ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:51:31,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-06-05 21:51:31,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 86. [2021-06-05 21:51:31,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.1411764705882352) internal successors, (182), 85 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:31,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 182 transitions. [2021-06-05 21:51:31,881 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 182 transitions. Word has length 16 [2021-06-05 21:51:31,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:31,881 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 182 transitions. [2021-06-05 21:51:31,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:31,881 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 182 transitions. [2021-06-05 21:51:31,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:51:31,881 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:31,882 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:32,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable352 [2021-06-05 21:51:32,082 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:32,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:32,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1399672538, now seen corresponding path program 71 times [2021-06-05 21:51:32,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:32,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556653440] [2021-06-05 21:51:32,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:32,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:32,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:32,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:32,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556653440] [2021-06-05 21:51:32,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556653440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:32,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742186430] [2021-06-05 21:51:32,238 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:32,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:51:32,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:32,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:51:32,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:32,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:32,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:32,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:51:32,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:32,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:32,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:51:32,334 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:32,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:32,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:32,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:32,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:51:32,361 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:51:32,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:32,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:51:32,365 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:51:32,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:32,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:51:32,386 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 21:51:32,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:32,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742186430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:32,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:32,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 21:51:32,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511360249] [2021-06-05 21:51:32,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:51:32,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:32,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:51:32,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:51:32,459 INFO L87 Difference]: Start difference. First operand 86 states and 182 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:32,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:32,813 INFO L93 Difference]: Finished difference Result 112 states and 235 transitions. [2021-06-05 21:51:32,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:51:32,814 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:51:32,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:32,814 INFO L225 Difference]: With dead ends: 112 [2021-06-05 21:51:32,814 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 21:51:32,814 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 449.3ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:51:32,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 21:51:32,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 86. [2021-06-05 21:51:32,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.1411764705882352) internal successors, (182), 85 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:32,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 182 transitions. [2021-06-05 21:51:32,815 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 182 transitions. Word has length 16 [2021-06-05 21:51:32,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:32,816 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 182 transitions. [2021-06-05 21:51:32,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:32,816 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 182 transitions. [2021-06-05 21:51:32,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:51:32,816 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:32,816 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:33,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2021-06-05 21:51:33,025 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:33,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:33,025 INFO L82 PathProgramCache]: Analyzing trace with hash -707111582, now seen corresponding path program 72 times [2021-06-05 21:51:33,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:33,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437796150] [2021-06-05 21:51:33,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:33,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:33,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:33,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:33,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437796150] [2021-06-05 21:51:33,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437796150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:33,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829925658] [2021-06-05 21:51:33,164 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:33,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:51:33,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:33,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:51:33,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:33,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:33,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:51:33,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:33,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:33,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:33,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:51:33,337 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:51:33,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:33,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:33,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:51:33,362 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:33,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:33,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:33,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:51:33,385 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:51:33,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:33,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:51:33,406 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-06-05 21:51:33,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:33,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829925658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:33,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:33,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 21:51:33,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218831688] [2021-06-05 21:51:33,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:51:33,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:33,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:51:33,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:51:33,502 INFO L87 Difference]: Start difference. First operand 86 states and 182 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:33,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:33,735 INFO L93 Difference]: Finished difference Result 117 states and 237 transitions. [2021-06-05 21:51:33,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:51:33,736 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:51:33,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:33,736 INFO L225 Difference]: With dead ends: 117 [2021-06-05 21:51:33,736 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 21:51:33,737 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 314.1ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:51:33,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 21:51:33,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 86. [2021-06-05 21:51:33,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.1411764705882352) internal successors, (182), 85 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:33,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 182 transitions. [2021-06-05 21:51:33,738 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 182 transitions. Word has length 16 [2021-06-05 21:51:33,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:33,738 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 182 transitions. [2021-06-05 21:51:33,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:33,738 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 182 transitions. [2021-06-05 21:51:33,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:51:33,738 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:33,738 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:33,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable358 [2021-06-05 21:51:33,945 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:33,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:33,945 INFO L82 PathProgramCache]: Analyzing trace with hash -125256330, now seen corresponding path program 73 times [2021-06-05 21:51:33,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:33,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138801237] [2021-06-05 21:51:33,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:33,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:34,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:34,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:34,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138801237] [2021-06-05 21:51:34,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138801237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:34,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894268505] [2021-06-05 21:51:34,064 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:34,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:34,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:51:34,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:34,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:34,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:51:34,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:34,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:34,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:34,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:51:34,181 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:51:34,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:34,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:51:34,188 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-06-05 21:51:34,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:34,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894268505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:34,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:34,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 21:51:34,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860951946] [2021-06-05 21:51:34,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:51:34,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:34,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:51:34,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:51:34,222 INFO L87 Difference]: Start difference. First operand 86 states and 182 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:34,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:34,488 INFO L93 Difference]: Finished difference Result 110 states and 228 transitions. [2021-06-05 21:51:34,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:51:34,489 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:51:34,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:34,489 INFO L225 Difference]: With dead ends: 110 [2021-06-05 21:51:34,489 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 21:51:34,489 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 286.0ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:51:34,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 21:51:34,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 87. [2021-06-05 21:51:34,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.1511627906976742) internal successors, (185), 86 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:34,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 185 transitions. [2021-06-05 21:51:34,490 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 185 transitions. Word has length 16 [2021-06-05 21:51:34,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:34,490 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 185 transitions. [2021-06-05 21:51:34,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:34,491 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 185 transitions. [2021-06-05 21:51:34,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:51:34,491 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:34,491 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:34,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable365,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:34,700 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:34,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:34,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1010928942, now seen corresponding path program 74 times [2021-06-05 21:51:34,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:34,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907263703] [2021-06-05 21:51:34,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:34,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:34,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:34,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:34,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907263703] [2021-06-05 21:51:34,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907263703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:34,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352633065] [2021-06-05 21:51:34,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:34,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:51:34,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:34,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:51:34,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:34,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:34,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:34,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:51:34,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:34,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:34,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:51:34,933 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:34,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:34,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:34,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:34,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:51:34,958 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:51:34,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:34,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:51:34,961 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:51:34,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:34,988 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:51:34,988 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 21:51:35,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:35,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352633065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:35,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:35,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 21:51:35,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104688239] [2021-06-05 21:51:35,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:51:35,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:35,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:51:35,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:51:35,069 INFO L87 Difference]: Start difference. First operand 87 states and 185 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:35,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:35,367 INFO L93 Difference]: Finished difference Result 113 states and 233 transitions. [2021-06-05 21:51:35,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:51:35,367 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:51:35,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:35,367 INFO L225 Difference]: With dead ends: 113 [2021-06-05 21:51:35,367 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 21:51:35,368 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 359.1ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:51:35,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 21:51:35,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 86. [2021-06-05 21:51:35,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.1411764705882352) internal successors, (182), 85 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:35,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 182 transitions. [2021-06-05 21:51:35,369 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 182 transitions. Word has length 16 [2021-06-05 21:51:35,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:35,369 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 182 transitions. [2021-06-05 21:51:35,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:35,369 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 182 transitions. [2021-06-05 21:51:35,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:51:35,369 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:35,369 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:35,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-06-05 21:51:35,577 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:35,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:35,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1135241818, now seen corresponding path program 75 times [2021-06-05 21:51:35,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:35,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450022401] [2021-06-05 21:51:35,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:35,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:35,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:35,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:35,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450022401] [2021-06-05 21:51:35,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450022401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:35,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686891330] [2021-06-05 21:51:35,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:35,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:51:35,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:35,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:51:35,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:35,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:35,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:51:35,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:35,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:35,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:35,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:51:35,846 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:35,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:35,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:35,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:51:35,875 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:51:35,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:35,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:35,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:51:35,906 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:51:35,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:35,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:51:35,928 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-06-05 21:51:36,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:36,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686891330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:36,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:36,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 21:51:36,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909511919] [2021-06-05 21:51:36,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:51:36,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:36,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:51:36,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:51:36,012 INFO L87 Difference]: Start difference. First operand 86 states and 182 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:36,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:36,279 INFO L93 Difference]: Finished difference Result 126 states and 253 transitions. [2021-06-05 21:51:36,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:51:36,279 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:51:36,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:36,280 INFO L225 Difference]: With dead ends: 126 [2021-06-05 21:51:36,280 INFO L226 Difference]: Without dead ends: 112 [2021-06-05 21:51:36,280 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 326.0ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:51:36,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-06-05 21:51:36,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 86. [2021-06-05 21:51:36,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.1411764705882352) internal successors, (182), 85 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:36,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 182 transitions. [2021-06-05 21:51:36,281 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 182 transitions. Word has length 16 [2021-06-05 21:51:36,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:36,281 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 182 transitions. [2021-06-05 21:51:36,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:36,281 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 182 transitions. [2021-06-05 21:51:36,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:51:36,281 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:36,281 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:36,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:36,497 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:36,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:36,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1052941358, now seen corresponding path program 76 times [2021-06-05 21:51:36,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:36,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427916066] [2021-06-05 21:51:36,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:36,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:36,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:36,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:36,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427916066] [2021-06-05 21:51:36,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427916066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:36,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372770352] [2021-06-05 21:51:36,634 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:36,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:51:36,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:36,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:51:36,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:36,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:36,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:36,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:51:36,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:36,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:36,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:51:36,731 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:36,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:36,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:36,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:36,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:51:36,760 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:51:36,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:36,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:51:36,764 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:51:36,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:36,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:51:36,786 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 21:51:36,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:36,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372770352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:36,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:36,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 21:51:36,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166369649] [2021-06-05 21:51:36,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:51:36,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:36,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:51:36,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:51:36,874 INFO L87 Difference]: Start difference. First operand 86 states and 182 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:37,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:37,470 INFO L93 Difference]: Finished difference Result 181 states and 350 transitions. [2021-06-05 21:51:37,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:51:37,470 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:51:37,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:37,471 INFO L225 Difference]: With dead ends: 181 [2021-06-05 21:51:37,471 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 21:51:37,471 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 603.9ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:51:37,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 21:51:37,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 90. [2021-06-05 21:51:37,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.191011235955056) internal successors, (195), 89 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:37,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 195 transitions. [2021-06-05 21:51:37,473 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 195 transitions. Word has length 16 [2021-06-05 21:51:37,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:37,473 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 195 transitions. [2021-06-05 21:51:37,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:37,473 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 195 transitions. [2021-06-05 21:51:37,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:51:37,473 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:37,473 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:37,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-06-05 21:51:37,681 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:37,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:37,681 INFO L82 PathProgramCache]: Analyzing trace with hash -275756062, now seen corresponding path program 77 times [2021-06-05 21:51:37,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:37,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472964470] [2021-06-05 21:51:37,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:37,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:37,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:37,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:37,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472964470] [2021-06-05 21:51:37,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472964470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:37,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102645334] [2021-06-05 21:51:37,856 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:37,890 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:51:37,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:37,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 21:51:37,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:37,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:37,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:37,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:51:37,967 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:37,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:37,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:51:37,970 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:37,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:37,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:37,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:37,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:51:37,997 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:51:37,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:37,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:51:38,001 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:51:38,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:38,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:51:38,022 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 21:51:38,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:38,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102645334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:38,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:38,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 21:51:38,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415663604] [2021-06-05 21:51:38,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:51:38,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:38,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:51:38,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:51:38,097 INFO L87 Difference]: Start difference. First operand 90 states and 195 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:38,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:38,536 INFO L93 Difference]: Finished difference Result 144 states and 298 transitions. [2021-06-05 21:51:38,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:51:38,536 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:51:38,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:38,536 INFO L225 Difference]: With dead ends: 144 [2021-06-05 21:51:38,537 INFO L226 Difference]: Without dead ends: 135 [2021-06-05 21:51:38,537 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 520.5ms TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:51:38,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-06-05 21:51:38,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 94. [2021-06-05 21:51:38,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.193548387096774) internal successors, (204), 93 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:38,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 204 transitions. [2021-06-05 21:51:38,538 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 204 transitions. Word has length 16 [2021-06-05 21:51:38,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:38,538 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 204 transitions. [2021-06-05 21:51:38,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:38,538 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 204 transitions. [2021-06-05 21:51:38,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:51:38,538 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:38,538 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:38,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable381 [2021-06-05 21:51:38,739 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:38,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:38,739 INFO L82 PathProgramCache]: Analyzing trace with hash 966701318, now seen corresponding path program 78 times [2021-06-05 21:51:38,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:38,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488472796] [2021-06-05 21:51:38,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:38,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:38,812 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:38,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:38,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488472796] [2021-06-05 21:51:38,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488472796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:38,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015605647] [2021-06-05 21:51:38,812 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:38,836 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:51:38,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:38,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:51:38,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:38,950 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:38,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015605647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:38,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:38,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 21:51:38,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823450993] [2021-06-05 21:51:38,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:51:38,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:38,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:51:38,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:51:38,951 INFO L87 Difference]: Start difference. First operand 94 states and 204 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:39,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:39,155 INFO L93 Difference]: Finished difference Result 128 states and 259 transitions. [2021-06-05 21:51:39,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:51:39,156 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:51:39,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:39,156 INFO L225 Difference]: With dead ends: 128 [2021-06-05 21:51:39,156 INFO L226 Difference]: Without dead ends: 114 [2021-06-05 21:51:39,156 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 242.8ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:51:39,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-06-05 21:51:39,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 89. [2021-06-05 21:51:39,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.2045454545454546) internal successors, (194), 88 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:39,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 194 transitions. [2021-06-05 21:51:39,158 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 194 transitions. Word has length 17 [2021-06-05 21:51:39,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:39,158 INFO L482 AbstractCegarLoop]: Abstraction has 89 states and 194 transitions. [2021-06-05 21:51:39,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:39,158 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 194 transitions. [2021-06-05 21:51:39,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:51:39,158 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:39,158 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:39,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:39,369 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:39,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:39,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1397953814, now seen corresponding path program 79 times [2021-06-05 21:51:39,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:39,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887039971] [2021-06-05 21:51:39,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:39,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:39,428 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:39,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:39,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887039971] [2021-06-05 21:51:39,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887039971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:39,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907083427] [2021-06-05 21:51:39,428 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:39,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:39,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:51:39,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:39,519 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:39,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907083427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:39,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:39,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 21:51:39,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032326801] [2021-06-05 21:51:39,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:51:39,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:39,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:51:39,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:51:39,520 INFO L87 Difference]: Start difference. First operand 89 states and 194 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:39,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:39,598 INFO L93 Difference]: Finished difference Result 126 states and 261 transitions. [2021-06-05 21:51:39,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:51:39,601 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:51:39,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:39,601 INFO L225 Difference]: With dead ends: 126 [2021-06-05 21:51:39,601 INFO L226 Difference]: Without dead ends: 126 [2021-06-05 21:51:39,601 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 88.2ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:51:39,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-05 21:51:39,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 90. [2021-06-05 21:51:39,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.2134831460674156) internal successors, (197), 89 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:39,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 197 transitions. [2021-06-05 21:51:39,603 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 197 transitions. Word has length 17 [2021-06-05 21:51:39,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:39,603 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 197 transitions. [2021-06-05 21:51:39,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:39,603 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 197 transitions. [2021-06-05 21:51:39,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:51:39,603 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:39,603 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:39,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-06-05 21:51:39,819 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:39,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:39,820 INFO L82 PathProgramCache]: Analyzing trace with hash 846772626, now seen corresponding path program 80 times [2021-06-05 21:51:39,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:39,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754268656] [2021-06-05 21:51:39,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:39,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:39,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:39,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:39,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754268656] [2021-06-05 21:51:39,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754268656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:39,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39173620] [2021-06-05 21:51:39,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:39,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:51:39,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:39,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:51:39,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:40,061 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:40,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39173620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:40,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:40,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 21:51:40,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742545438] [2021-06-05 21:51:40,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:51:40,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:40,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:51:40,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:51:40,062 INFO L87 Difference]: Start difference. First operand 90 states and 197 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:40,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:40,428 INFO L93 Difference]: Finished difference Result 128 states and 260 transitions. [2021-06-05 21:51:40,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:51:40,428 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:51:40,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:40,428 INFO L225 Difference]: With dead ends: 128 [2021-06-05 21:51:40,429 INFO L226 Difference]: Without dead ends: 119 [2021-06-05 21:51:40,429 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 399.1ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:51:40,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-05 21:51:40,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 91. [2021-06-05 21:51:40,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.2111111111111112) internal successors, (199), 90 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:40,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 199 transitions. [2021-06-05 21:51:40,430 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 199 transitions. Word has length 17 [2021-06-05 21:51:40,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:40,430 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 199 transitions. [2021-06-05 21:51:40,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:40,430 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 199 transitions. [2021-06-05 21:51:40,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:51:40,430 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:40,431 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:40,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable392,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:40,639 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:40,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:40,639 INFO L82 PathProgramCache]: Analyzing trace with hash 396996678, now seen corresponding path program 81 times [2021-06-05 21:51:40,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:40,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15501142] [2021-06-05 21:51:40,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:40,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:40,702 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:40,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:40,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15501142] [2021-06-05 21:51:40,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15501142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:40,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534044054] [2021-06-05 21:51:40,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:40,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:51:40,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:40,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:51:40,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:40,843 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:40,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534044054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:40,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:40,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 21:51:40,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231694261] [2021-06-05 21:51:40,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:51:40,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:40,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:51:40,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:51:40,844 INFO L87 Difference]: Start difference. First operand 91 states and 199 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:41,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:41,028 INFO L93 Difference]: Finished difference Result 143 states and 295 transitions. [2021-06-05 21:51:41,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:51:41,029 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:51:41,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:41,029 INFO L225 Difference]: With dead ends: 143 [2021-06-05 21:51:41,029 INFO L226 Difference]: Without dead ends: 143 [2021-06-05 21:51:41,029 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 165.4ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:51:41,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-06-05 21:51:41,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 91. [2021-06-05 21:51:41,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.2111111111111112) internal successors, (199), 90 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:41,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 199 transitions. [2021-06-05 21:51:41,031 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 199 transitions. Word has length 17 [2021-06-05 21:51:41,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:41,031 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 199 transitions. [2021-06-05 21:51:41,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:41,031 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 199 transitions. [2021-06-05 21:51:41,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:51:41,031 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:41,031 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:41,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-06-05 21:51:41,253 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:41,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:41,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1799125834, now seen corresponding path program 82 times [2021-06-05 21:51:41,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:41,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354809496] [2021-06-05 21:51:41,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:41,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:41,346 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:41,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:41,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354809496] [2021-06-05 21:51:41,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354809496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:41,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635718392] [2021-06-05 21:51:41,347 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:41,387 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:51:41,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:41,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:51:41,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:41,535 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:41,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635718392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:41,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:41,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 21:51:41,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788828315] [2021-06-05 21:51:41,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:51:41,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:41,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:51:41,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:51:41,536 INFO L87 Difference]: Start difference. First operand 91 states and 199 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:41,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:41,912 INFO L93 Difference]: Finished difference Result 126 states and 257 transitions. [2021-06-05 21:51:41,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:51:41,913 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:51:41,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:41,913 INFO L225 Difference]: With dead ends: 126 [2021-06-05 21:51:41,913 INFO L226 Difference]: Without dead ends: 120 [2021-06-05 21:51:41,914 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 427.3ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:51:41,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-06-05 21:51:41,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 91. [2021-06-05 21:51:41,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.2111111111111112) internal successors, (199), 90 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:41,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 199 transitions. [2021-06-05 21:51:41,915 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 199 transitions. Word has length 17 [2021-06-05 21:51:41,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:41,915 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 199 transitions. [2021-06-05 21:51:41,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:41,915 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 199 transitions. [2021-06-05 21:51:41,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:51:41,915 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:41,915 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:42,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable402 [2021-06-05 21:51:42,116 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:42,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:42,116 INFO L82 PathProgramCache]: Analyzing trace with hash -847782378, now seen corresponding path program 83 times [2021-06-05 21:51:42,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:42,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512203474] [2021-06-05 21:51:42,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:42,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:42,171 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:42,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:42,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512203474] [2021-06-05 21:51:42,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512203474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:42,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264592143] [2021-06-05 21:51:42,171 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:42,205 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:51:42,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:42,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:51:42,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:42,352 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:42,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264592143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:42,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:42,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:51:42,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856232274] [2021-06-05 21:51:42,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:51:42,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:42,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:51:42,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:51:42,353 INFO L87 Difference]: Start difference. First operand 91 states and 199 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:42,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:42,520 INFO L93 Difference]: Finished difference Result 140 states and 289 transitions. [2021-06-05 21:51:42,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:51:42,521 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:51:42,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:42,521 INFO L225 Difference]: With dead ends: 140 [2021-06-05 21:51:42,521 INFO L226 Difference]: Without dead ends: 140 [2021-06-05 21:51:42,521 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 193.3ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:51:42,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-06-05 21:51:42,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 92. [2021-06-05 21:51:42,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.208791208791209) internal successors, (201), 91 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:42,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 201 transitions. [2021-06-05 21:51:42,523 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 201 transitions. Word has length 17 [2021-06-05 21:51:42,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:42,523 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 201 transitions. [2021-06-05 21:51:42,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:42,523 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 201 transitions. [2021-06-05 21:51:42,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:51:42,523 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:42,523 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:42,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable408,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:42,724 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:42,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:42,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1633836398, now seen corresponding path program 84 times [2021-06-05 21:51:42,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:42,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427341054] [2021-06-05 21:51:42,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:42,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:42,808 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:42,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:42,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427341054] [2021-06-05 21:51:42,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427341054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:42,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615550813] [2021-06-05 21:51:42,808 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:42,834 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:51:42,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:42,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:51:42,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:42,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:42,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:42,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:51:42,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:42,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:42,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:51:42,974 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:43,011 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-06-05 21:51:43,011 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:51:43,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 21:51:43,014 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:43,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:43,034 INFO L518 ElimStorePlain]: Eliminatee v_prenex_77 vanished before elimination [2021-06-05 21:51:43,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:51:43,035 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 21:51:43,062 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:43,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615550813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:43,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:43,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 21:51:43,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890025512] [2021-06-05 21:51:43,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:51:43,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:43,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:51:43,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:51:43,063 INFO L87 Difference]: Start difference. First operand 92 states and 201 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:43,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:43,670 INFO L93 Difference]: Finished difference Result 139 states and 278 transitions. [2021-06-05 21:51:43,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:51:43,671 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:51:43,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:43,671 INFO L225 Difference]: With dead ends: 139 [2021-06-05 21:51:43,671 INFO L226 Difference]: Without dead ends: 136 [2021-06-05 21:51:43,671 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 630.8ms TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:51:43,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-06-05 21:51:43,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 97. [2021-06-05 21:51:43,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.2083333333333335) internal successors, (212), 96 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:43,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 212 transitions. [2021-06-05 21:51:43,673 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 212 transitions. Word has length 17 [2021-06-05 21:51:43,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:43,673 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 212 transitions. [2021-06-05 21:51:43,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:43,673 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 212 transitions. [2021-06-05 21:51:43,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:51:43,673 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:43,673 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:43,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable412 [2021-06-05 21:51:43,873 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:43,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:43,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1857767866, now seen corresponding path program 85 times [2021-06-05 21:51:43,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:43,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074647012] [2021-06-05 21:51:43,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:43,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:43,933 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:43,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:43,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074647012] [2021-06-05 21:51:43,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074647012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:43,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624646318] [2021-06-05 21:51:43,934 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:43,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:43,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:51:43,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:44,142 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:44,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624646318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:44,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:44,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:51:44,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094820203] [2021-06-05 21:51:44,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:51:44,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:44,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:51:44,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:51:44,143 INFO L87 Difference]: Start difference. First operand 97 states and 212 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:44,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:44,371 INFO L93 Difference]: Finished difference Result 141 states and 292 transitions. [2021-06-05 21:51:44,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:51:44,372 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:51:44,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:44,372 INFO L225 Difference]: With dead ends: 141 [2021-06-05 21:51:44,372 INFO L226 Difference]: Without dead ends: 141 [2021-06-05 21:51:44,372 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 255.6ms TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:51:44,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-06-05 21:51:44,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 97. [2021-06-05 21:51:44,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.2083333333333335) internal successors, (212), 96 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:44,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 212 transitions. [2021-06-05 21:51:44,374 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 212 transitions. Word has length 17 [2021-06-05 21:51:44,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:44,374 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 212 transitions. [2021-06-05 21:51:44,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:44,374 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 212 transitions. [2021-06-05 21:51:44,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:51:44,374 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:44,374 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:44,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-06-05 21:51:44,575 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:44,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:44,575 INFO L82 PathProgramCache]: Analyzing trace with hash -497651126, now seen corresponding path program 86 times [2021-06-05 21:51:44,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:44,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196119384] [2021-06-05 21:51:44,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:44,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:44,657 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:44,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:44,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196119384] [2021-06-05 21:51:44,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196119384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:44,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629287629] [2021-06-05 21:51:44,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:44,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:51:44,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:44,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:51:44,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:44,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:44,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:44,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:51:44,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:44,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:44,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:51:44,812 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:44,849 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-06-05 21:51:44,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 21:51:44,852 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:44,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:44,864 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:51:44,864 INFO L518 ElimStorePlain]: Eliminatee v_prenex_80 vanished before elimination [2021-06-05 21:51:44,865 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:51:44,865 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 21:51:44,891 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:44,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629287629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:44,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:44,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 21:51:44,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472682582] [2021-06-05 21:51:44,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:51:44,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:44,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:51:44,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:51:44,892 INFO L87 Difference]: Start difference. First operand 97 states and 212 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:45,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:45,326 INFO L93 Difference]: Finished difference Result 124 states and 257 transitions. [2021-06-05 21:51:45,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:51:45,326 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:51:45,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:45,326 INFO L225 Difference]: With dead ends: 124 [2021-06-05 21:51:45,327 INFO L226 Difference]: Without dead ends: 124 [2021-06-05 21:51:45,327 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 465.7ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:51:45,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-06-05 21:51:45,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 93. [2021-06-05 21:51:45,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.2065217391304346) internal successors, (203), 92 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:45,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 203 transitions. [2021-06-05 21:51:45,328 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 203 transitions. Word has length 17 [2021-06-05 21:51:45,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:45,328 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 203 transitions. [2021-06-05 21:51:45,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:45,328 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 203 transitions. [2021-06-05 21:51:45,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:51:45,328 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:45,328 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:45,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2021-06-05 21:51:45,534 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:45,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:45,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1801174, now seen corresponding path program 87 times [2021-06-05 21:51:45,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:45,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404370465] [2021-06-05 21:51:45,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:45,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:45,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:45,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:45,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404370465] [2021-06-05 21:51:45,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404370465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:45,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930429986] [2021-06-05 21:51:45,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:45,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:51:45,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:45,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:51:45,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:45,735 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:45,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930429986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:45,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:45,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 21:51:45,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467826278] [2021-06-05 21:51:45,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:51:45,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:45,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:51:45,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:51:45,736 INFO L87 Difference]: Start difference. First operand 93 states and 203 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:45,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:45,944 INFO L93 Difference]: Finished difference Result 109 states and 229 transitions. [2021-06-05 21:51:45,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:51:45,944 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:51:45,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:45,945 INFO L225 Difference]: With dead ends: 109 [2021-06-05 21:51:45,945 INFO L226 Difference]: Without dead ends: 100 [2021-06-05 21:51:45,945 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 235.6ms TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:51:45,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-05 21:51:45,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 95. [2021-06-05 21:51:45,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.202127659574468) internal successors, (207), 94 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:45,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 207 transitions. [2021-06-05 21:51:45,946 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 207 transitions. Word has length 17 [2021-06-05 21:51:45,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:45,946 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 207 transitions. [2021-06-05 21:51:45,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:45,946 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 207 transitions. [2021-06-05 21:51:45,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:51:45,947 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:45,947 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:46,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable437 [2021-06-05 21:51:46,161 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:46,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:46,161 INFO L82 PathProgramCache]: Analyzing trace with hash -447974774, now seen corresponding path program 88 times [2021-06-05 21:51:46,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:46,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254557133] [2021-06-05 21:51:46,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:46,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:46,217 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:46,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:46,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254557133] [2021-06-05 21:51:46,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254557133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:46,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288580227] [2021-06-05 21:51:46,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:46,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:51:46,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:46,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:51:46,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:46,343 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:46,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288580227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:46,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:46,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 21:51:46,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147953313] [2021-06-05 21:51:46,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:51:46,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:46,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:51:46,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:51:46,344 INFO L87 Difference]: Start difference. First operand 95 states and 207 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:46,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:46,414 INFO L93 Difference]: Finished difference Result 112 states and 240 transitions. [2021-06-05 21:51:46,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:51:46,414 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:51:46,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:46,415 INFO L225 Difference]: With dead ends: 112 [2021-06-05 21:51:46,415 INFO L226 Difference]: Without dead ends: 112 [2021-06-05 21:51:46,415 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 99.5ms TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:51:46,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-06-05 21:51:46,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 95. [2021-06-05 21:51:46,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.202127659574468) internal successors, (207), 94 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:46,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 207 transitions. [2021-06-05 21:51:46,416 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 207 transitions. Word has length 17 [2021-06-05 21:51:46,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:46,416 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 207 transitions. [2021-06-05 21:51:46,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:46,416 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 207 transitions. [2021-06-05 21:51:46,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:51:46,417 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:46,417 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:46,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-06-05 21:51:46,617 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:46,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:46,617 INFO L82 PathProgramCache]: Analyzing trace with hash 954154382, now seen corresponding path program 89 times [2021-06-05 21:51:46,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:46,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911364279] [2021-06-05 21:51:46,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:46,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:46,696 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:46,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:46,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911364279] [2021-06-05 21:51:46,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911364279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:46,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806688814] [2021-06-05 21:51:46,697 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:46,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:51:46,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:46,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:51:46,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:46,845 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:46,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806688814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:46,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:46,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 21:51:46,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787810405] [2021-06-05 21:51:46,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:51:46,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:46,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:51:46,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:51:46,846 INFO L87 Difference]: Start difference. First operand 95 states and 207 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:47,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:47,100 INFO L93 Difference]: Finished difference Result 107 states and 226 transitions. [2021-06-05 21:51:47,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:51:47,100 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:51:47,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:47,101 INFO L225 Difference]: With dead ends: 107 [2021-06-05 21:51:47,101 INFO L226 Difference]: Without dead ends: 101 [2021-06-05 21:51:47,101 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 291.7ms TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:51:47,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-06-05 21:51:47,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 95. [2021-06-05 21:51:47,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.202127659574468) internal successors, (207), 94 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:47,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 207 transitions. [2021-06-05 21:51:47,103 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 207 transitions. Word has length 17 [2021-06-05 21:51:47,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:47,103 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 207 transitions. [2021-06-05 21:51:47,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:47,103 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 207 transitions. [2021-06-05 21:51:47,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:51:47,103 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:47,103 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:47,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable447,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:47,304 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:47,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:47,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1692753830, now seen corresponding path program 90 times [2021-06-05 21:51:47,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:47,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124901256] [2021-06-05 21:51:47,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:47,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:47,369 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:47,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:47,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124901256] [2021-06-05 21:51:47,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124901256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:47,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022527202] [2021-06-05 21:51:47,369 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:47,393 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:51:47,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:47,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:51:47,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:47,519 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:47,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022527202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:47,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:47,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 21:51:47,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425767969] [2021-06-05 21:51:47,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:51:47,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:47,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:51:47,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:51:47,520 INFO L87 Difference]: Start difference. First operand 95 states and 207 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:47,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:47,632 INFO L93 Difference]: Finished difference Result 125 states and 266 transitions. [2021-06-05 21:51:47,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:51:47,633 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:51:47,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:47,633 INFO L225 Difference]: With dead ends: 125 [2021-06-05 21:51:47,633 INFO L226 Difference]: Without dead ends: 125 [2021-06-05 21:51:47,633 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 125.6ms TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:51:47,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-06-05 21:51:47,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 96. [2021-06-05 21:51:47,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.2) internal successors, (209), 95 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:47,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 209 transitions. [2021-06-05 21:51:47,635 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 209 transitions. Word has length 17 [2021-06-05 21:51:47,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:47,635 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 209 transitions. [2021-06-05 21:51:47,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:47,635 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 209 transitions. [2021-06-05 21:51:47,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:51:47,635 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:47,635 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:47,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable453 [2021-06-05 21:51:47,837 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:47,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:47,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1816159446, now seen corresponding path program 91 times [2021-06-05 21:51:47,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:47,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8192334] [2021-06-05 21:51:47,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:47,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:47,921 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:47,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:47,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8192334] [2021-06-05 21:51:47,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8192334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:47,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970602023] [2021-06-05 21:51:47,922 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:47,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:47,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:51:47,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:48,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:48,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:48,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:51:48,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:48,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:48,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:51:48,063 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:48,101 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-06-05 21:51:48,102 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:51:48,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 21:51:48,105 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:48,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:48,118 INFO L518 ElimStorePlain]: Eliminatee v_prenex_85 vanished before elimination [2021-06-05 21:51:48,119 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:51:48,119 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 21:51:48,149 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:48,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970602023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:48,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:48,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 21:51:48,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653006317] [2021-06-05 21:51:48,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:51:48,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:48,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:51:48,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:51:48,150 INFO L87 Difference]: Start difference. First operand 96 states and 209 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:48,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:48,466 INFO L93 Difference]: Finished difference Result 120 states and 247 transitions. [2021-06-05 21:51:48,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:51:48,467 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:51:48,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:48,467 INFO L225 Difference]: With dead ends: 120 [2021-06-05 21:51:48,467 INFO L226 Difference]: Without dead ends: 117 [2021-06-05 21:51:48,468 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 343.4ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:51:48,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-06-05 21:51:48,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 101. [2021-06-05 21:51:48,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.2) internal successors, (220), 100 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:48,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 220 transitions. [2021-06-05 21:51:48,469 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 220 transitions. Word has length 17 [2021-06-05 21:51:48,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:48,469 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 220 transitions. [2021-06-05 21:51:48,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:48,469 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 220 transitions. [2021-06-05 21:51:48,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:51:48,469 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:48,469 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:48,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable457 [2021-06-05 21:51:48,685 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:48,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:48,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1592227978, now seen corresponding path program 92 times [2021-06-05 21:51:48,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:48,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122240550] [2021-06-05 21:51:48,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:48,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:48,747 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:48,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:48,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122240550] [2021-06-05 21:51:48,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122240550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:48,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060249870] [2021-06-05 21:51:48,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:48,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:51:48,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:48,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:51:48,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:48,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:48,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:48,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:51:48,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:48,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:48,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:51:48,889 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:48,934 INFO L628 ElimStorePlain]: treesize reduction 74, result has 39.8 percent of original size [2021-06-05 21:51:48,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:48,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:51:48,938 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:51:48,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:48,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 21:51:48,957 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:48,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:48,972 INFO L518 ElimStorePlain]: Eliminatee v_prenex_88 vanished before elimination [2021-06-05 21:51:48,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:51:48,974 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-06-05 21:51:49,013 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:49,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060249870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:49,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:49,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:51:49,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744985548] [2021-06-05 21:51:49,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:51:49,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:49,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:51:49,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:51:49,014 INFO L87 Difference]: Start difference. First operand 101 states and 220 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:49,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:49,118 INFO L93 Difference]: Finished difference Result 126 states and 269 transitions. [2021-06-05 21:51:49,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:51:49,118 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:51:49,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:49,118 INFO L225 Difference]: With dead ends: 126 [2021-06-05 21:51:49,118 INFO L226 Difference]: Without dead ends: 126 [2021-06-05 21:51:49,119 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 146.9ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:51:49,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-05 21:51:49,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 101. [2021-06-05 21:51:49,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.2) internal successors, (220), 100 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:49,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 220 transitions. [2021-06-05 21:51:49,120 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 220 transitions. Word has length 17 [2021-06-05 21:51:49,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:49,120 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 220 transitions. [2021-06-05 21:51:49,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:49,120 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 220 transitions. [2021-06-05 21:51:49,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:51:49,120 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:49,120 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:49,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable465 [2021-06-05 21:51:49,337 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:49,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:49,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1342622578, now seen corresponding path program 93 times [2021-06-05 21:51:49,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:49,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163818588] [2021-06-05 21:51:49,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:49,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:49,412 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:49,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:49,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163818588] [2021-06-05 21:51:49,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163818588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:49,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236239925] [2021-06-05 21:51:49,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:49,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:51:49,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:49,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:51:49,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:49,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:49,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:49,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:51:49,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:49,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:49,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:51:49,551 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:49,590 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-06-05 21:51:49,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 21:51:49,593 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:49,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:49,606 INFO L518 ElimStorePlain]: Eliminatee v_prenex_91 vanished before elimination [2021-06-05 21:51:49,606 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:51:49,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:51:49,608 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 21:51:49,633 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:49,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236239925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:49,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:49,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 21:51:49,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641785540] [2021-06-05 21:51:49,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:51:49,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:49,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:51:49,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:51:49,634 INFO L87 Difference]: Start difference. First operand 101 states and 220 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:49,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:49,840 INFO L93 Difference]: Finished difference Result 105 states and 226 transitions. [2021-06-05 21:51:49,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:51:49,840 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:51:49,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:49,840 INFO L225 Difference]: With dead ends: 105 [2021-06-05 21:51:49,840 INFO L226 Difference]: Without dead ends: 105 [2021-06-05 21:51:49,841 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 249.3ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:51:49,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-06-05 21:51:49,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 94. [2021-06-05 21:51:49,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.204301075268817) internal successors, (205), 93 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:49,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 205 transitions. [2021-06-05 21:51:49,842 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 205 transitions. Word has length 17 [2021-06-05 21:51:49,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:49,842 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 205 transitions. [2021-06-05 21:51:49,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:49,842 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 205 transitions. [2021-06-05 21:51:49,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:51:49,842 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:49,842 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:50,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2021-06-05 21:51:50,043 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:50,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:50,043 INFO L82 PathProgramCache]: Analyzing trace with hash 68356102, now seen corresponding path program 94 times [2021-06-05 21:51:50,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:50,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992465699] [2021-06-05 21:51:50,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:50,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:50,112 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:50,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:50,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992465699] [2021-06-05 21:51:50,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992465699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:50,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107603610] [2021-06-05 21:51:50,112 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:50,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:51:50,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:50,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:51:50,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:50,242 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:50,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107603610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:50,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:50,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 21:51:50,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025965189] [2021-06-05 21:51:50,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:51:50,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:50,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:51:50,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:51:50,243 INFO L87 Difference]: Start difference. First operand 94 states and 205 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:50,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:50,491 INFO L93 Difference]: Finished difference Result 106 states and 224 transitions. [2021-06-05 21:51:50,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:51:50,491 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:51:50,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:50,492 INFO L225 Difference]: With dead ends: 106 [2021-06-05 21:51:50,492 INFO L226 Difference]: Without dead ends: 100 [2021-06-05 21:51:50,492 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 255.4ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:51:50,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-05 21:51:50,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 93. [2021-06-05 21:51:50,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.2065217391304346) internal successors, (203), 92 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:50,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 203 transitions. [2021-06-05 21:51:50,493 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 203 transitions. Word has length 17 [2021-06-05 21:51:50,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:50,493 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 203 transitions. [2021-06-05 21:51:50,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:50,493 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 203 transitions. [2021-06-05 21:51:50,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:51:50,494 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:50,494 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:50,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable476 [2021-06-05 21:51:50,694 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:50,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:50,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1716415186, now seen corresponding path program 95 times [2021-06-05 21:51:50,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:50,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301614541] [2021-06-05 21:51:50,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:50,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:50,759 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:50,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:50,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301614541] [2021-06-05 21:51:50,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301614541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:50,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118248538] [2021-06-05 21:51:50,760 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:50,786 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:51:50,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:50,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:51:50,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:50,883 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:50,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118248538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:50,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:50,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 21:51:50,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220188567] [2021-06-05 21:51:50,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:51:50,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:50,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:51:50,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:51:50,883 INFO L87 Difference]: Start difference. First operand 93 states and 203 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:51,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:51,004 INFO L93 Difference]: Finished difference Result 123 states and 261 transitions. [2021-06-05 21:51:51,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:51:51,005 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:51:51,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:51,005 INFO L225 Difference]: With dead ends: 123 [2021-06-05 21:51:51,005 INFO L226 Difference]: Without dead ends: 123 [2021-06-05 21:51:51,005 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 135.4ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:51:51,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-06-05 21:51:51,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 95. [2021-06-05 21:51:51,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.202127659574468) internal successors, (207), 94 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:51,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 207 transitions. [2021-06-05 21:51:51,007 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 207 transitions. Word has length 17 [2021-06-05 21:51:51,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:51,007 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 207 transitions. [2021-06-05 21:51:51,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:51,007 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 207 transitions. [2021-06-05 21:51:51,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:51:51,007 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:51,007 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:51,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:51,213 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:51,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:51,213 INFO L82 PathProgramCache]: Analyzing trace with hash 930361166, now seen corresponding path program 96 times [2021-06-05 21:51:51,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:51,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517240725] [2021-06-05 21:51:51,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:51,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:51,289 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:51,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:51,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517240725] [2021-06-05 21:51:51,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517240725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:51,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005979279] [2021-06-05 21:51:51,289 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:51,313 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:51:51,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:51,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:51:51,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:51,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:51,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:51,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:51:51,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:51,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:51,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:51:51,404 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:51,442 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-06-05 21:51:51,442 INFO L518 ElimStorePlain]: Eliminatee v_prenex_93 vanished before elimination [2021-06-05 21:51:51,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 21:51:51,445 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:51,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:51,458 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:51:51,458 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:51:51,459 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 21:51:51,485 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:51,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005979279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:51,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:51,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 21:51:51,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264942634] [2021-06-05 21:51:51,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:51:51,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:51,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:51:51,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:51:51,486 INFO L87 Difference]: Start difference. First operand 95 states and 207 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:51,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:51,842 INFO L93 Difference]: Finished difference Result 126 states and 259 transitions. [2021-06-05 21:51:51,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:51:51,842 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:51:51,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:51,843 INFO L225 Difference]: With dead ends: 126 [2021-06-05 21:51:51,843 INFO L226 Difference]: Without dead ends: 123 [2021-06-05 21:51:51,843 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 338.3ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:51:51,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-06-05 21:51:51,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 100. [2021-06-05 21:51:51,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.202020202020202) internal successors, (218), 99 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:51,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 218 transitions. [2021-06-05 21:51:51,844 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 218 transitions. Word has length 17 [2021-06-05 21:51:51,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:51,844 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 218 transitions. [2021-06-05 21:51:51,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:51,844 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 218 transitions. [2021-06-05 21:51:51,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:51:51,845 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:51,845 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:52,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2021-06-05 21:51:52,061 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:52,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:52,061 INFO L82 PathProgramCache]: Analyzing trace with hash 706429698, now seen corresponding path program 97 times [2021-06-05 21:51:52,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:52,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525976601] [2021-06-05 21:51:52,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:52,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:52,121 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:52,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:52,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525976601] [2021-06-05 21:51:52,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525976601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:52,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554058447] [2021-06-05 21:51:52,121 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:52,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:52,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:51:52,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:52,262 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:52,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554058447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:52,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:52,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:51:52,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560772075] [2021-06-05 21:51:52,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:51:52,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:52,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:51:52,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:51:52,262 INFO L87 Difference]: Start difference. First operand 100 states and 218 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:52,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:52,507 INFO L93 Difference]: Finished difference Result 134 states and 284 transitions. [2021-06-05 21:51:52,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:51:52,507 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:51:52,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:52,508 INFO L225 Difference]: With dead ends: 134 [2021-06-05 21:51:52,508 INFO L226 Difference]: Without dead ends: 134 [2021-06-05 21:51:52,508 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 237.0ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:51:52,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-06-05 21:51:52,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 100. [2021-06-05 21:51:52,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.202020202020202) internal successors, (218), 99 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:52,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 218 transitions. [2021-06-05 21:51:52,513 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 218 transitions. Word has length 17 [2021-06-05 21:51:52,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:52,513 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 218 transitions. [2021-06-05 21:51:52,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:52,513 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 218 transitions. [2021-06-05 21:51:52,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:51:52,513 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:52,513 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:52,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:52,725 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:52,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:52,725 INFO L82 PathProgramCache]: Analyzing trace with hash 2066546438, now seen corresponding path program 98 times [2021-06-05 21:51:52,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:52,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147455601] [2021-06-05 21:51:52,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:52,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:52,789 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:52,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:52,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147455601] [2021-06-05 21:51:52,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147455601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:52,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267877969] [2021-06-05 21:51:52,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:52,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:51:52,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:52,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:51:52,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:52,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:52,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:52,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:51:52,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:52,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:52,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:51:52,938 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:52,976 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-06-05 21:51:52,976 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:51:52,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 21:51:52,979 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:52,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:52,992 INFO L518 ElimStorePlain]: Eliminatee v_prenex_96 vanished before elimination [2021-06-05 21:51:52,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:51:52,994 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 21:51:53,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:53,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267877969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:53,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:53,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 21:51:53,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262484132] [2021-06-05 21:51:53,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:51:53,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:53,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:51:53,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:51:53,019 INFO L87 Difference]: Start difference. First operand 100 states and 218 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:53,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:53,238 INFO L93 Difference]: Finished difference Result 111 states and 238 transitions. [2021-06-05 21:51:53,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:51:53,238 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:51:53,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:53,239 INFO L225 Difference]: With dead ends: 111 [2021-06-05 21:51:53,239 INFO L226 Difference]: Without dead ends: 111 [2021-06-05 21:51:53,239 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 230.3ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:51:53,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-06-05 21:51:53,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 94. [2021-06-05 21:51:53,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.204301075268817) internal successors, (205), 93 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:53,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 205 transitions. [2021-06-05 21:51:53,240 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 205 transitions. Word has length 17 [2021-06-05 21:51:53,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:53,240 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 205 transitions. [2021-06-05 21:51:53,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:53,240 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 205 transitions. [2021-06-05 21:51:53,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:51:53,240 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:53,241 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:53,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable506,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:53,441 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:53,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:53,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1176422954, now seen corresponding path program 99 times [2021-06-05 21:51:53,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:53,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704497383] [2021-06-05 21:51:53,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:53,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:53,497 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:53,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:53,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704497383] [2021-06-05 21:51:53,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704497383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:53,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580624157] [2021-06-05 21:51:53,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:53,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:51:53,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:53,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:51:53,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:53,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:53,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:53,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:51:53,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:53,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:53,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:53,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:51:53,606 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:53,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:53,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:53,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:51:53,610 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:53,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:53,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:51:53,613 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:53,647 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 21:51:53,647 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:51:53,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:51:53,648 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 21:51:53,676 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:53,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580624157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:53,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:53,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 21:51:53,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395647740] [2021-06-05 21:51:53,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:51:53,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:53,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:51:53,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:51:53,677 INFO L87 Difference]: Start difference. First operand 94 states and 205 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:53,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:53,852 INFO L93 Difference]: Finished difference Result 139 states and 285 transitions. [2021-06-05 21:51:53,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:51:53,852 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:51:53,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:53,852 INFO L225 Difference]: With dead ends: 139 [2021-06-05 21:51:53,852 INFO L226 Difference]: Without dead ends: 136 [2021-06-05 21:51:53,852 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 168.8ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:51:53,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-06-05 21:51:53,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 101. [2021-06-05 21:51:53,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.22) internal successors, (222), 100 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:53,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 222 transitions. [2021-06-05 21:51:53,854 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 222 transitions. Word has length 17 [2021-06-05 21:51:53,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:53,854 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 222 transitions. [2021-06-05 21:51:53,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:53,854 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 222 transitions. [2021-06-05 21:51:53,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:51:53,854 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:53,854 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:54,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable513 [2021-06-05 21:51:54,055 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:54,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:54,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1400354422, now seen corresponding path program 100 times [2021-06-05 21:51:54,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:54,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761454894] [2021-06-05 21:51:54,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:54,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:54,120 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:54,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:54,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761454894] [2021-06-05 21:51:54,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761454894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:54,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882495284] [2021-06-05 21:51:54,120 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:54,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:51:54,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:54,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:51:54,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:54,241 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:54,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882495284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:54,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:54,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 21:51:54,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333912332] [2021-06-05 21:51:54,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:51:54,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:54,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:51:54,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:51:54,242 INFO L87 Difference]: Start difference. First operand 101 states and 222 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:54,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:54,419 INFO L93 Difference]: Finished difference Result 133 states and 276 transitions. [2021-06-05 21:51:54,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:51:54,420 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:51:54,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:54,420 INFO L225 Difference]: With dead ends: 133 [2021-06-05 21:51:54,420 INFO L226 Difference]: Without dead ends: 133 [2021-06-05 21:51:54,420 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 193.0ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:51:54,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-06-05 21:51:54,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 101. [2021-06-05 21:51:54,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.22) internal successors, (222), 100 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:54,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 222 transitions. [2021-06-05 21:51:54,422 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 222 transitions. Word has length 17 [2021-06-05 21:51:54,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:54,422 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 222 transitions. [2021-06-05 21:51:54,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:54,422 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 222 transitions. [2021-06-05 21:51:54,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:51:54,422 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:54,422 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:54,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable524,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:54,625 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:54,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:54,625 INFO L82 PathProgramCache]: Analyzing trace with hash -40237682, now seen corresponding path program 101 times [2021-06-05 21:51:54,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:54,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463007358] [2021-06-05 21:51:54,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:54,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:54,682 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:54,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:54,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463007358] [2021-06-05 21:51:54,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463007358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:54,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69006341] [2021-06-05 21:51:54,682 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:54,708 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:51:54,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:54,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:51:54,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:54,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:54,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:54,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:51:54,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:54,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:54,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:54,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:51:54,795 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:54,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:54,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:54,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:51:54,799 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:54,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:54,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:51:54,802 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:54,834 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 21:51:54,834 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:51:54,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:51:54,835 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 21:51:54,858 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:54,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69006341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:54,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:54,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 21:51:54,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459927446] [2021-06-05 21:51:54,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:51:54,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:54,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:51:54,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:51:54,859 INFO L87 Difference]: Start difference. First operand 101 states and 222 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:55,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:55,062 INFO L93 Difference]: Finished difference Result 144 states and 297 transitions. [2021-06-05 21:51:55,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:51:55,062 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:51:55,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:55,062 INFO L225 Difference]: With dead ends: 144 [2021-06-05 21:51:55,062 INFO L226 Difference]: Without dead ends: 144 [2021-06-05 21:51:55,062 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 189.6ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:51:55,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-06-05 21:51:55,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 100. [2021-06-05 21:51:55,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.2222222222222223) internal successors, (220), 99 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:55,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 220 transitions. [2021-06-05 21:51:55,063 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 220 transitions. Word has length 17 [2021-06-05 21:51:55,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:55,064 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 220 transitions. [2021-06-05 21:51:55,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:55,064 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 220 transitions. [2021-06-05 21:51:55,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:51:55,064 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:55,064 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:55,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable534 [2021-06-05 21:51:55,269 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:55,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:55,269 INFO L82 PathProgramCache]: Analyzing trace with hash 2021677620, now seen corresponding path program 102 times [2021-06-05 21:51:55,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:55,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795341750] [2021-06-05 21:51:55,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:55,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:55,351 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:55,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:55,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795341750] [2021-06-05 21:51:55,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795341750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:55,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50636732] [2021-06-05 21:51:55,351 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:55,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:51:55,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:55,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:51:55,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:55,454 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:55,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50636732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:55,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:55,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 21:51:55,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127756823] [2021-06-05 21:51:55,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:51:55,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:55,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:51:55,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:51:55,455 INFO L87 Difference]: Start difference. First operand 100 states and 220 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:55,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:55,651 INFO L93 Difference]: Finished difference Result 109 states and 233 transitions. [2021-06-05 21:51:55,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:51:55,651 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:51:55,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:55,651 INFO L225 Difference]: With dead ends: 109 [2021-06-05 21:51:55,651 INFO L226 Difference]: Without dead ends: 105 [2021-06-05 21:51:55,651 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 220.4ms TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:51:55,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-06-05 21:51:55,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 100. [2021-06-05 21:51:55,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.212121212121212) internal successors, (219), 99 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:55,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 219 transitions. [2021-06-05 21:51:55,653 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 219 transitions. Word has length 17 [2021-06-05 21:51:55,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:55,653 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 219 transitions. [2021-06-05 21:51:55,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:55,653 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 219 transitions. [2021-06-05 21:51:55,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:51:55,653 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:55,653 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:55,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable544,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:55,861 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:55,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:55,861 INFO L82 PathProgramCache]: Analyzing trace with hash 2108558854, now seen corresponding path program 103 times [2021-06-05 21:51:55,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:55,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026040324] [2021-06-05 21:51:55,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:55,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:55,928 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:55,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:55,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026040324] [2021-06-05 21:51:55,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026040324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:55,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534192775] [2021-06-05 21:51:55,928 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:55,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:55,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:51:55,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:56,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:56,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:56,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:51:56,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:56,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:56,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:51:56,035 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:56,049 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-06-05 21:51:56,049 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:51:56,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:51:56,050 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-06-05 21:51:56,055 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:56,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534192775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:56,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:56,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 21:51:56,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496793392] [2021-06-05 21:51:56,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:51:56,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:56,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:51:56,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:51:56,056 INFO L87 Difference]: Start difference. First operand 100 states and 219 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:56,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:56,200 INFO L93 Difference]: Finished difference Result 121 states and 258 transitions. [2021-06-05 21:51:56,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:51:56,201 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:51:56,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:56,201 INFO L225 Difference]: With dead ends: 121 [2021-06-05 21:51:56,201 INFO L226 Difference]: Without dead ends: 121 [2021-06-05 21:51:56,201 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 155.1ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:51:56,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-06-05 21:51:56,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 95. [2021-06-05 21:51:56,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.202127659574468) internal successors, (207), 94 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:56,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 207 transitions. [2021-06-05 21:51:56,202 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 207 transitions. Word has length 17 [2021-06-05 21:51:56,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:56,203 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 207 transitions. [2021-06-05 21:51:56,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:56,203 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 207 transitions. [2021-06-05 21:51:56,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:51:56,203 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:56,203 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:56,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:56,419 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:56,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:56,419 INFO L82 PathProgramCache]: Analyzing trace with hash -422510062, now seen corresponding path program 104 times [2021-06-05 21:51:56,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:56,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323260647] [2021-06-05 21:51:56,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:56,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:56,484 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:56,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:56,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323260647] [2021-06-05 21:51:56,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323260647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:56,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45209418] [2021-06-05 21:51:56,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:56,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:51:56,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:56,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:51:56,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:56,631 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:56,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45209418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:56,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:56,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:51:56,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284746618] [2021-06-05 21:51:56,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:51:56,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:56,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:51:56,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:51:56,632 INFO L87 Difference]: Start difference. First operand 95 states and 207 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:56,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:56,793 INFO L93 Difference]: Finished difference Result 107 states and 225 transitions. [2021-06-05 21:51:56,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:51:56,794 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:51:56,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:56,796 INFO L225 Difference]: With dead ends: 107 [2021-06-05 21:51:56,796 INFO L226 Difference]: Without dead ends: 98 [2021-06-05 21:51:56,796 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 219.9ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:51:56,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-06-05 21:51:56,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 95. [2021-06-05 21:51:56,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.1914893617021276) internal successors, (206), 94 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:56,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 206 transitions. [2021-06-05 21:51:56,799 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 206 transitions. Word has length 17 [2021-06-05 21:51:56,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:56,799 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 206 transitions. [2021-06-05 21:51:56,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:56,799 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 206 transitions. [2021-06-05 21:51:56,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:51:56,799 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:56,799 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:57,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable552 [2021-06-05 21:51:57,009 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:57,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:57,009 INFO L82 PathProgramCache]: Analyzing trace with hash -872286010, now seen corresponding path program 105 times [2021-06-05 21:51:57,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:57,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147708054] [2021-06-05 21:51:57,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:57,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:57,072 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:57,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:57,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147708054] [2021-06-05 21:51:57,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147708054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:57,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574997304] [2021-06-05 21:51:57,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:57,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:51:57,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:57,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:51:57,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:57,226 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:57,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574997304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:57,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:57,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 21:51:57,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717177524] [2021-06-05 21:51:57,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:51:57,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:57,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:51:57,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:51:57,227 INFO L87 Difference]: Start difference. First operand 95 states and 206 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:57,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:57,335 INFO L93 Difference]: Finished difference Result 110 states and 236 transitions. [2021-06-05 21:51:57,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:51:57,335 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:51:57,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:57,335 INFO L225 Difference]: With dead ends: 110 [2021-06-05 21:51:57,335 INFO L226 Difference]: Without dead ends: 110 [2021-06-05 21:51:57,335 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 135.2ms TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:51:57,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-06-05 21:51:57,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 95. [2021-06-05 21:51:57,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.1914893617021276) internal successors, (206), 94 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:57,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 206 transitions. [2021-06-05 21:51:57,337 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 206 transitions. Word has length 17 [2021-06-05 21:51:57,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:57,337 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 206 transitions. [2021-06-05 21:51:57,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:57,337 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 206 transitions. [2021-06-05 21:51:57,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:51:57,337 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:57,337 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:57,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable558 [2021-06-05 21:51:57,551 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:57,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:57,551 INFO L82 PathProgramCache]: Analyzing trace with hash 529843146, now seen corresponding path program 106 times [2021-06-05 21:51:57,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:57,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471083278] [2021-06-05 21:51:57,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:57,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:57,622 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:57,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:57,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471083278] [2021-06-05 21:51:57,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471083278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:57,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837189361] [2021-06-05 21:51:57,622 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:57,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:51:57,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:57,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:51:57,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:57,812 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:57,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837189361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:57,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:57,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:51:57,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643160832] [2021-06-05 21:51:57,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:51:57,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:57,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:51:57,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:51:57,813 INFO L87 Difference]: Start difference. First operand 95 states and 206 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:58,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:58,105 INFO L93 Difference]: Finished difference Result 105 states and 222 transitions. [2021-06-05 21:51:58,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:51:58,105 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:51:58,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:58,106 INFO L225 Difference]: With dead ends: 105 [2021-06-05 21:51:58,106 INFO L226 Difference]: Without dead ends: 99 [2021-06-05 21:51:58,106 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 339.0ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:51:58,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-06-05 21:51:58,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2021-06-05 21:51:58,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.1914893617021276) internal successors, (206), 94 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:58,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 206 transitions. [2021-06-05 21:51:58,107 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 206 transitions. Word has length 17 [2021-06-05 21:51:58,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:58,107 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 206 transitions. [2021-06-05 21:51:58,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:58,107 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 206 transitions. [2021-06-05 21:51:58,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:51:58,107 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:58,107 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:58,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable562,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:58,308 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:58,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:58,308 INFO L82 PathProgramCache]: Analyzing trace with hash -2117065066, now seen corresponding path program 107 times [2021-06-05 21:51:58,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:58,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035878992] [2021-06-05 21:51:58,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:58,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:58,365 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:58,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:58,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035878992] [2021-06-05 21:51:58,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035878992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:58,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366079371] [2021-06-05 21:51:58,365 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:58,414 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:51:58,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:58,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:51:58,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:58,542 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:58,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366079371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:58,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:58,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:51:58,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218321095] [2021-06-05 21:51:58,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:51:58,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:58,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:51:58,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:51:58,543 INFO L87 Difference]: Start difference. First operand 95 states and 206 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:58,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:58,775 INFO L93 Difference]: Finished difference Result 123 states and 262 transitions. [2021-06-05 21:51:58,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:51:58,776 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:51:58,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:58,776 INFO L225 Difference]: With dead ends: 123 [2021-06-05 21:51:58,776 INFO L226 Difference]: Without dead ends: 123 [2021-06-05 21:51:58,776 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 270.7ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:51:58,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-06-05 21:51:58,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 96. [2021-06-05 21:51:58,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.1894736842105265) internal successors, (208), 95 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:58,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 208 transitions. [2021-06-05 21:51:58,782 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 208 transitions. Word has length 17 [2021-06-05 21:51:58,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:58,783 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 208 transitions. [2021-06-05 21:51:58,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:58,783 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 208 transitions. [2021-06-05 21:51:58,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:51:58,783 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:58,783 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:58,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable568 [2021-06-05 21:51:58,993 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:58,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:58,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1391848210, now seen corresponding path program 108 times [2021-06-05 21:51:58,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:58,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691620363] [2021-06-05 21:51:58,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:58,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:59,063 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:59,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:59,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691620363] [2021-06-05 21:51:59,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691620363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:59,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562774338] [2021-06-05 21:51:59,063 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:59,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:51:59,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:51:59,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:51:59,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:51:59,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:59,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:59,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:51:59,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:59,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:59,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:51:59,216 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:59,264 INFO L628 ElimStorePlain]: treesize reduction 74, result has 41.7 percent of original size [2021-06-05 21:51:59,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:51:59,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 21:51:59,272 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:51:59,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:59,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 21:51:59,292 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:51:59,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:51:59,308 INFO L518 ElimStorePlain]: Eliminatee v_prenex_103 vanished before elimination [2021-06-05 21:51:59,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:51:59,309 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-06-05 21:51:59,340 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:59,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562774338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:59,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:51:59,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:51:59,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092710904] [2021-06-05 21:51:59,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:51:59,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:51:59,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:51:59,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:51:59,341 INFO L87 Difference]: Start difference. First operand 96 states and 208 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:59,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:51:59,578 INFO L93 Difference]: Finished difference Result 123 states and 253 transitions. [2021-06-05 21:51:59,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:51:59,578 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:51:59,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:51:59,578 INFO L225 Difference]: With dead ends: 123 [2021-06-05 21:51:59,578 INFO L226 Difference]: Without dead ends: 120 [2021-06-05 21:51:59,578 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 256.6ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:51:59,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-06-05 21:51:59,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 101. [2021-06-05 21:51:59,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.19) internal successors, (219), 100 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:59,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 219 transitions. [2021-06-05 21:51:59,580 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 219 transitions. Word has length 17 [2021-06-05 21:51:59,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:51:59,580 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 219 transitions. [2021-06-05 21:51:59,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:51:59,580 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 219 transitions. [2021-06-05 21:51:59,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:51:59,580 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:51:59,580 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:51:59,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable572,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:59,785 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:51:59,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:51:59,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1167916742, now seen corresponding path program 109 times [2021-06-05 21:51:59,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:51:59,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088547940] [2021-06-05 21:51:59,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:51:59,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:59,855 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:51:59,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:51:59,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088547940] [2021-06-05 21:51:59,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088547940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:51:59,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966781307] [2021-06-05 21:51:59,855 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:51:59,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:51:59,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:51:59,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:00,041 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:00,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966781307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:00,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:00,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 21:52:00,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857343988] [2021-06-05 21:52:00,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:52:00,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:00,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:52:00,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:52:00,042 INFO L87 Difference]: Start difference. First operand 101 states and 219 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:00,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:00,353 INFO L93 Difference]: Finished difference Result 134 states and 285 transitions. [2021-06-05 21:52:00,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:52:00,353 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:00,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:00,354 INFO L225 Difference]: With dead ends: 134 [2021-06-05 21:52:00,354 INFO L226 Difference]: Without dead ends: 134 [2021-06-05 21:52:00,354 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 342.7ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:52:00,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-06-05 21:52:00,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 101. [2021-06-05 21:52:00,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.19) internal successors, (219), 100 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:00,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 219 transitions. [2021-06-05 21:52:00,355 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 219 transitions. Word has length 17 [2021-06-05 21:52:00,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:00,355 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 219 transitions. [2021-06-05 21:52:00,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:00,355 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 219 transitions. [2021-06-05 21:52:00,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:00,355 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:00,355 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:00,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable579 [2021-06-05 21:52:00,573 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:00,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:00,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1766933814, now seen corresponding path program 110 times [2021-06-05 21:52:00,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:00,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363945923] [2021-06-05 21:52:00,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:00,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:00,645 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:00,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:00,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363945923] [2021-06-05 21:52:00,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363945923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:00,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266248549] [2021-06-05 21:52:00,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:00,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:52:00,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:00,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:00,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:00,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:00,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:00,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:52:00,795 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:00,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:00,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:52:00,798 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:00,837 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-06-05 21:52:00,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 21:52:00,840 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:00,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:52:00,853 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:52:00,853 INFO L518 ElimStorePlain]: Eliminatee v_prenex_106 vanished before elimination [2021-06-05 21:52:00,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:52:00,854 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 21:52:00,882 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:00,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266248549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:00,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:00,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:52:00,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209758752] [2021-06-05 21:52:00,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:52:00,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:00,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:52:00,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:00,882 INFO L87 Difference]: Start difference. First operand 101 states and 219 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:01,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:01,128 INFO L93 Difference]: Finished difference Result 108 states and 232 transitions. [2021-06-05 21:52:01,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:52:01,128 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:01,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:01,128 INFO L225 Difference]: With dead ends: 108 [2021-06-05 21:52:01,128 INFO L226 Difference]: Without dead ends: 108 [2021-06-05 21:52:01,129 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 297.5ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:52:01,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-06-05 21:52:01,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 93. [2021-06-05 21:52:01,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.1956521739130435) internal successors, (202), 92 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:01,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 202 transitions. [2021-06-05 21:52:01,130 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 202 transitions. Word has length 17 [2021-06-05 21:52:01,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:01,130 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 202 transitions. [2021-06-05 21:52:01,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:01,130 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 202 transitions. [2021-06-05 21:52:01,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:01,130 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:01,130 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:01,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:01,330 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:01,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:01,331 INFO L82 PathProgramCache]: Analyzing trace with hash -2045898038, now seen corresponding path program 111 times [2021-06-05 21:52:01,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:01,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373521096] [2021-06-05 21:52:01,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:01,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:01,407 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:01,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:01,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373521096] [2021-06-05 21:52:01,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373521096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:01,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781478694] [2021-06-05 21:52:01,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:01,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:52:01,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:01,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:01,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:01,556 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:01,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781478694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:01,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:01,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:52:01,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304592187] [2021-06-05 21:52:01,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:52:01,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:01,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:52:01,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:01,557 INFO L87 Difference]: Start difference. First operand 93 states and 202 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:01,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:01,759 INFO L93 Difference]: Finished difference Result 104 states and 220 transitions. [2021-06-05 21:52:01,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:52:01,760 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:01,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:01,760 INFO L225 Difference]: With dead ends: 104 [2021-06-05 21:52:01,760 INFO L226 Difference]: Without dead ends: 98 [2021-06-05 21:52:01,760 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 234.0ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:52:01,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-06-05 21:52:01,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2021-06-05 21:52:01,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.193548387096774) internal successors, (204), 93 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:01,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 204 transitions. [2021-06-05 21:52:01,765 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 204 transitions. Word has length 17 [2021-06-05 21:52:01,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:01,766 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 204 transitions. [2021-06-05 21:52:01,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:01,766 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 204 transitions. [2021-06-05 21:52:01,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:01,766 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:01,766 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:01,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-06-05 21:52:01,976 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:01,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:01,977 INFO L82 PathProgramCache]: Analyzing trace with hash -397838954, now seen corresponding path program 112 times [2021-06-05 21:52:01,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:01,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627347174] [2021-06-05 21:52:01,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:01,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:02,061 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:02,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:02,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627347174] [2021-06-05 21:52:02,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627347174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:02,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336651534] [2021-06-05 21:52:02,061 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:02,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:52:02,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:02,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:02,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:02,193 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:02,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336651534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:02,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:02,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:52:02,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229591358] [2021-06-05 21:52:02,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:52:02,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:02,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:52:02,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:02,194 INFO L87 Difference]: Start difference. First operand 94 states and 204 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:02,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:02,280 INFO L93 Difference]: Finished difference Result 116 states and 248 transitions. [2021-06-05 21:52:02,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:52:02,281 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:02,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:02,281 INFO L225 Difference]: With dead ends: 116 [2021-06-05 21:52:02,281 INFO L226 Difference]: Without dead ends: 116 [2021-06-05 21:52:02,281 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 121.1ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:02,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-06-05 21:52:02,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 94. [2021-06-05 21:52:02,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.193548387096774) internal successors, (204), 93 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:02,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 204 transitions. [2021-06-05 21:52:02,282 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 204 transitions. Word has length 17 [2021-06-05 21:52:02,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:02,283 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 204 transitions. [2021-06-05 21:52:02,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:02,283 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 204 transitions. [2021-06-05 21:52:02,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:02,283 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:02,283 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:02,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable604,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:02,493 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:02,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:02,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1183892974, now seen corresponding path program 113 times [2021-06-05 21:52:02,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:02,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630119595] [2021-06-05 21:52:02,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:02,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:02,560 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:02,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:02,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630119595] [2021-06-05 21:52:02,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630119595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:02,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126212449] [2021-06-05 21:52:02,560 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:02,584 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:52:02,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:02,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:02,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:02,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:02,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:02,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:52:02,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:02,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:02,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:52:02,687 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:02,727 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-06-05 21:52:02,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 21:52:02,730 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:02,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:52:02,743 INFO L518 ElimStorePlain]: Eliminatee v_prenex_109 vanished before elimination [2021-06-05 21:52:02,743 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:52:02,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:52:02,744 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 21:52:02,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:02,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126212449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:02,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:02,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:52:02,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7784774] [2021-06-05 21:52:02,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:52:02,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:02,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:52:02,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:02,771 INFO L87 Difference]: Start difference. First operand 94 states and 204 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:02,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:02,974 INFO L93 Difference]: Finished difference Result 124 states and 255 transitions. [2021-06-05 21:52:02,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:52:02,974 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:02,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:02,975 INFO L225 Difference]: With dead ends: 124 [2021-06-05 21:52:02,975 INFO L226 Difference]: Without dead ends: 121 [2021-06-05 21:52:02,975 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 215.3ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:52:02,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-06-05 21:52:02,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2021-06-05 21:52:02,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.204081632653061) internal successors, (216), 98 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:02,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 216 transitions. [2021-06-05 21:52:02,976 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 216 transitions. Word has length 17 [2021-06-05 21:52:02,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:02,976 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 216 transitions. [2021-06-05 21:52:02,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:02,976 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 216 transitions. [2021-06-05 21:52:02,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:02,977 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:02,977 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:03,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable608,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:03,193 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:03,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:03,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1407824442, now seen corresponding path program 114 times [2021-06-05 21:52:03,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:03,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637488709] [2021-06-05 21:52:03,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:03,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:03,258 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:03,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:03,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637488709] [2021-06-05 21:52:03,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637488709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:03,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467298339] [2021-06-05 21:52:03,258 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:03,283 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:52:03,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:03,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:03,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:03,420 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:03,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467298339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:03,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:03,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 21:52:03,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256486169] [2021-06-05 21:52:03,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:52:03,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:03,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:52:03,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:52:03,421 INFO L87 Difference]: Start difference. First operand 99 states and 216 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:03,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:03,635 INFO L93 Difference]: Finished difference Result 148 states and 306 transitions. [2021-06-05 21:52:03,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:52:03,636 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:03,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:03,636 INFO L225 Difference]: With dead ends: 148 [2021-06-05 21:52:03,636 INFO L226 Difference]: Without dead ends: 148 [2021-06-05 21:52:03,636 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 211.0ms TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:52:03,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-06-05 21:52:03,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 99. [2021-06-05 21:52:03,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.204081632653061) internal successors, (216), 98 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:03,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 216 transitions. [2021-06-05 21:52:03,637 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 216 transitions. Word has length 17 [2021-06-05 21:52:03,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:03,638 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 216 transitions. [2021-06-05 21:52:03,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:03,638 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 216 transitions. [2021-06-05 21:52:03,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:03,638 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:03,638 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:03,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable616,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:03,838 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:03,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:03,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1476352022, now seen corresponding path program 115 times [2021-06-05 21:52:03,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:03,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481869338] [2021-06-05 21:52:03,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:03,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:03,904 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:03,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:03,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481869338] [2021-06-05 21:52:03,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481869338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:03,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147100333] [2021-06-05 21:52:03,905 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:03,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:03,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:03,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:04,062 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:04,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147100333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:04,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:04,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:52:04,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631659415] [2021-06-05 21:52:04,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:52:04,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:04,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:52:04,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:04,063 INFO L87 Difference]: Start difference. First operand 99 states and 216 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:04,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:04,199 INFO L93 Difference]: Finished difference Result 124 states and 263 transitions. [2021-06-05 21:52:04,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:52:04,199 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:04,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:04,199 INFO L225 Difference]: With dead ends: 124 [2021-06-05 21:52:04,199 INFO L226 Difference]: Without dead ends: 122 [2021-06-05 21:52:04,199 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 162.8ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:52:04,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-06-05 21:52:04,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 99. [2021-06-05 21:52:04,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.193877551020408) internal successors, (215), 98 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:04,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 215 transitions. [2021-06-05 21:52:04,201 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 215 transitions. Word has length 17 [2021-06-05 21:52:04,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:04,201 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 215 transitions. [2021-06-05 21:52:04,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:04,201 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 215 transitions. [2021-06-05 21:52:04,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:04,201 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:04,201 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:04,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable628 [2021-06-05 21:52:04,402 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:04,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:04,402 INFO L82 PathProgramCache]: Analyzing trace with hash -47707702, now seen corresponding path program 116 times [2021-06-05 21:52:04,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:04,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943511904] [2021-06-05 21:52:04,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:04,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:04,471 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:04,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:04,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943511904] [2021-06-05 21:52:04,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943511904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:04,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6981951] [2021-06-05 21:52:04,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:04,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:52:04,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:04,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:04,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:04,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:04,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:04,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:52:04,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:04,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:04,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:52:04,592 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:04,629 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-06-05 21:52:04,629 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:52:04,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 21:52:04,632 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:04,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:52:04,645 INFO L518 ElimStorePlain]: Eliminatee v_prenex_112 vanished before elimination [2021-06-05 21:52:04,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:52:04,646 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 21:52:04,669 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:04,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6981951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:04,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:04,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:52:04,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701948260] [2021-06-05 21:52:04,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:52:04,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:04,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:52:04,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:04,670 INFO L87 Difference]: Start difference. First operand 99 states and 215 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:04,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:04,826 INFO L93 Difference]: Finished difference Result 107 states and 230 transitions. [2021-06-05 21:52:04,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:52:04,827 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:04,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:04,827 INFO L225 Difference]: With dead ends: 107 [2021-06-05 21:52:04,827 INFO L226 Difference]: Without dead ends: 107 [2021-06-05 21:52:04,827 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 180.1ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:52:04,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-06-05 21:52:04,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 93. [2021-06-05 21:52:04,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.1956521739130435) internal successors, (202), 92 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:04,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 202 transitions. [2021-06-05 21:52:04,828 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 202 transitions. Word has length 17 [2021-06-05 21:52:04,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:04,828 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 202 transitions. [2021-06-05 21:52:04,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:04,828 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 202 transitions. [2021-06-05 21:52:04,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:04,828 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:04,829 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:05,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable639,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:05,029 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:05,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:05,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1004290202, now seen corresponding path program 117 times [2021-06-05 21:52:05,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:05,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584385326] [2021-06-05 21:52:05,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:05,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:05,103 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:05,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:05,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584385326] [2021-06-05 21:52:05,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584385326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:05,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122670259] [2021-06-05 21:52:05,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:05,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:52:05,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:05,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:05,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:05,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:05,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:05,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:52:05,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:05,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:05,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:05,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:52:05,220 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:05,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:05,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:05,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:52:05,223 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:05,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:05,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:52:05,226 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:05,258 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 21:52:05,258 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:52:05,259 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:52:05,259 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 21:52:05,284 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:05,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122670259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:05,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:05,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:52:05,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557306208] [2021-06-05 21:52:05,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:52:05,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:05,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:52:05,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:05,285 INFO L87 Difference]: Start difference. First operand 93 states and 202 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:05,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:05,503 INFO L93 Difference]: Finished difference Result 135 states and 276 transitions. [2021-06-05 21:52:05,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:52:05,503 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:05,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:05,504 INFO L225 Difference]: With dead ends: 135 [2021-06-05 21:52:05,504 INFO L226 Difference]: Without dead ends: 132 [2021-06-05 21:52:05,504 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 233.5ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:52:05,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-06-05 21:52:05,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 100. [2021-06-05 21:52:05,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.212121212121212) internal successors, (219), 99 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:05,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 219 transitions. [2021-06-05 21:52:05,505 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 219 transitions. Word has length 17 [2021-06-05 21:52:05,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:05,505 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 219 transitions. [2021-06-05 21:52:05,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:05,505 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 219 transitions. [2021-06-05 21:52:05,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:05,505 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:05,505 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:05,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable646 [2021-06-05 21:52:05,706 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:05,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:05,706 INFO L82 PathProgramCache]: Analyzing trace with hash 780358734, now seen corresponding path program 118 times [2021-06-05 21:52:05,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:05,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527147566] [2021-06-05 21:52:05,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:05,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:05,776 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:05,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:05,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527147566] [2021-06-05 21:52:05,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527147566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:05,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391623299] [2021-06-05 21:52:05,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:05,800 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:52:05,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:05,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:05,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:05,934 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:05,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391623299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:05,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:05,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 21:52:05,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266389995] [2021-06-05 21:52:05,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:52:05,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:05,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:52:05,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:52:05,935 INFO L87 Difference]: Start difference. First operand 100 states and 219 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:06,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:06,143 INFO L93 Difference]: Finished difference Result 127 states and 264 transitions. [2021-06-05 21:52:06,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:52:06,144 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:06,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:06,144 INFO L225 Difference]: With dead ends: 127 [2021-06-05 21:52:06,144 INFO L226 Difference]: Without dead ends: 127 [2021-06-05 21:52:06,144 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 252.9ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:52:06,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-05 21:52:06,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 100. [2021-06-05 21:52:06,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.212121212121212) internal successors, (219), 99 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:06,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 219 transitions. [2021-06-05 21:52:06,145 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 219 transitions. Word has length 17 [2021-06-05 21:52:06,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:06,145 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 219 transitions. [2021-06-05 21:52:06,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:06,145 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 219 transitions. [2021-06-05 21:52:06,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:06,146 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:06,146 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:06,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable657 [2021-06-05 21:52:06,346 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:06,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:06,346 INFO L82 PathProgramCache]: Analyzing trace with hash 2140475474, now seen corresponding path program 119 times [2021-06-05 21:52:06,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:06,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274916772] [2021-06-05 21:52:06,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:06,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:06,408 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:06,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:06,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274916772] [2021-06-05 21:52:06,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274916772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:06,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925009146] [2021-06-05 21:52:06,408 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:06,432 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:52:06,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:06,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:06,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:06,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:06,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:06,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:52:06,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:06,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:06,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:06,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:52:06,527 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:06,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:06,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:06,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:52:06,530 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:06,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:06,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:52:06,533 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:06,565 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 21:52:06,565 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:52:06,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:52:06,569 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 21:52:06,598 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:06,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925009146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:06,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:06,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:52:06,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486257790] [2021-06-05 21:52:06,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:52:06,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:06,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:52:06,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:06,600 INFO L87 Difference]: Start difference. First operand 100 states and 219 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:06,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:06,805 INFO L93 Difference]: Finished difference Result 138 states and 285 transitions. [2021-06-05 21:52:06,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:52:06,805 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:06,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:06,805 INFO L225 Difference]: With dead ends: 138 [2021-06-05 21:52:06,805 INFO L226 Difference]: Without dead ends: 138 [2021-06-05 21:52:06,805 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 232.7ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:52:06,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-06-05 21:52:06,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 99. [2021-06-05 21:52:06,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.2142857142857144) internal successors, (217), 98 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:06,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 217 transitions. [2021-06-05 21:52:06,807 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 217 transitions. Word has length 17 [2021-06-05 21:52:06,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:06,807 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 217 transitions. [2021-06-05 21:52:06,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:06,807 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 217 transitions. [2021-06-05 21:52:06,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:06,807 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:06,807 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:07,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable667 [2021-06-05 21:52:07,007 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:07,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:07,008 INFO L82 PathProgramCache]: Analyzing trace with hash -92576520, now seen corresponding path program 120 times [2021-06-05 21:52:07,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:07,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593495886] [2021-06-05 21:52:07,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:07,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:07,074 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:07,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:07,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593495886] [2021-06-05 21:52:07,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593495886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:07,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459625276] [2021-06-05 21:52:07,074 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:07,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 21:52:07,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:07,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:52:07,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:07,188 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:07,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459625276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:07,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:07,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:52:07,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370065025] [2021-06-05 21:52:07,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:52:07,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:07,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:52:07,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:07,189 INFO L87 Difference]: Start difference. First operand 99 states and 217 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:07,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:07,308 INFO L93 Difference]: Finished difference Result 106 states and 227 transitions. [2021-06-05 21:52:07,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:52:07,309 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:07,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:07,309 INFO L225 Difference]: With dead ends: 106 [2021-06-05 21:52:07,309 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 21:52:07,309 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 169.8ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:52:07,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 21:52:07,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2021-06-05 21:52:07,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.204081632653061) internal successors, (216), 98 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:07,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 216 transitions. [2021-06-05 21:52:07,310 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 216 transitions. Word has length 17 [2021-06-05 21:52:07,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:07,310 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 216 transitions. [2021-06-05 21:52:07,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:07,311 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 216 transitions. [2021-06-05 21:52:07,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:07,311 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:07,311 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:07,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable679,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:07,511 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:07,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:07,511 INFO L82 PathProgramCache]: Analyzing trace with hash -5695286, now seen corresponding path program 121 times [2021-06-05 21:52:07,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:07,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770571978] [2021-06-05 21:52:07,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:07,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:07,580 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:07,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:07,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770571978] [2021-06-05 21:52:07,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770571978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:07,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114445358] [2021-06-05 21:52:07,580 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:07,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:07,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:07,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:07,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:07,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:07,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:52:07,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:07,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:07,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:52:07,708 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:07,724 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-06-05 21:52:07,724 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:52:07,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:52:07,725 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-06-05 21:52:07,730 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:07,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114445358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:07,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:07,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:52:07,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755773432] [2021-06-05 21:52:07,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:52:07,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:07,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:52:07,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:07,731 INFO L87 Difference]: Start difference. First operand 99 states and 216 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:07,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:07,837 INFO L93 Difference]: Finished difference Result 115 states and 246 transitions. [2021-06-05 21:52:07,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:52:07,837 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:07,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:07,837 INFO L225 Difference]: With dead ends: 115 [2021-06-05 21:52:07,837 INFO L226 Difference]: Without dead ends: 115 [2021-06-05 21:52:07,838 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 153.8ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:52:07,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-06-05 21:52:07,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 92. [2021-06-05 21:52:07,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.197802197802198) internal successors, (200), 91 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:07,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 200 transitions. [2021-06-05 21:52:07,839 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 200 transitions. Word has length 17 [2021-06-05 21:52:07,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:07,839 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 200 transitions. [2021-06-05 21:52:07,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:07,839 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 200 transitions. [2021-06-05 21:52:07,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:07,839 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:07,840 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:08,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable683 [2021-06-05 21:52:08,049 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:08,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:08,049 INFO L82 PathProgramCache]: Analyzing trace with hash 118491922, now seen corresponding path program 122 times [2021-06-05 21:52:08,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:08,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687644326] [2021-06-05 21:52:08,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:08,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:08,105 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:08,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:08,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687644326] [2021-06-05 21:52:08,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687644326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:08,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127100164] [2021-06-05 21:52:08,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:08,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:52:08,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:08,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:08,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:08,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:08,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:08,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:52:08,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:08,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:08,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:08,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:52:08,241 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:08,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:08,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:08,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:52:08,244 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:08,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:08,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:52:08,251 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:08,281 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 21:52:08,281 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:52:08,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:52:08,282 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 21:52:08,309 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:08,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127100164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:08,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:08,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:52:08,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055895156] [2021-06-05 21:52:08,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:52:08,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:08,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:52:08,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:08,313 INFO L87 Difference]: Start difference. First operand 92 states and 200 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:08,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:08,573 INFO L93 Difference]: Finished difference Result 133 states and 273 transitions. [2021-06-05 21:52:08,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:52:08,573 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:08,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:08,574 INFO L225 Difference]: With dead ends: 133 [2021-06-05 21:52:08,574 INFO L226 Difference]: Without dead ends: 130 [2021-06-05 21:52:08,574 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 271.4ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:52:08,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-06-05 21:52:08,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 101. [2021-06-05 21:52:08,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.24) internal successors, (224), 100 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:08,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 224 transitions. [2021-06-05 21:52:08,575 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 224 transitions. Word has length 17 [2021-06-05 21:52:08,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:08,575 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 224 transitions. [2021-06-05 21:52:08,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:08,576 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 224 transitions. [2021-06-05 21:52:08,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:08,576 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:08,576 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:08,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable687,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:08,783 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:08,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:08,784 INFO L82 PathProgramCache]: Analyzing trace with hash -105439546, now seen corresponding path program 123 times [2021-06-05 21:52:08,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:08,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332139961] [2021-06-05 21:52:08,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:08,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:08,868 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:08,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:08,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332139961] [2021-06-05 21:52:08,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332139961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:08,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881528233] [2021-06-05 21:52:08,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:08,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:52:08,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:08,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:08,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:09,006 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:09,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881528233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:09,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:09,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:52:09,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274010880] [2021-06-05 21:52:09,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:52:09,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:09,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:52:09,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:09,007 INFO L87 Difference]: Start difference. First operand 101 states and 224 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:09,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:09,219 INFO L93 Difference]: Finished difference Result 131 states and 274 transitions. [2021-06-05 21:52:09,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:52:09,220 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:09,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:09,220 INFO L225 Difference]: With dead ends: 131 [2021-06-05 21:52:09,220 INFO L226 Difference]: Without dead ends: 131 [2021-06-05 21:52:09,220 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 262.0ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:52:09,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-06-05 21:52:09,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2021-06-05 21:52:09,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.24) internal successors, (224), 100 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:09,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 224 transitions. [2021-06-05 21:52:09,221 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 224 transitions. Word has length 17 [2021-06-05 21:52:09,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:09,221 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 224 transitions. [2021-06-05 21:52:09,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:09,221 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 224 transitions. [2021-06-05 21:52:09,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:09,222 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:09,222 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:09,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable698 [2021-06-05 21:52:09,425 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:09,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:09,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1516230378, now seen corresponding path program 124 times [2021-06-05 21:52:09,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:09,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769531083] [2021-06-05 21:52:09,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:09,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:09,498 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:09,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:09,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769531083] [2021-06-05 21:52:09,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769531083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:09,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358579303] [2021-06-05 21:52:09,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:09,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:52:09,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:09,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:09,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:09,644 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:09,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358579303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:09,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:09,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:52:09,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830383904] [2021-06-05 21:52:09,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:52:09,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:09,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:52:09,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:09,644 INFO L87 Difference]: Start difference. First operand 101 states and 224 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:09,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:09,962 INFO L93 Difference]: Finished difference Result 133 states and 275 transitions. [2021-06-05 21:52:09,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:52:09,963 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:09,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:09,963 INFO L225 Difference]: With dead ends: 133 [2021-06-05 21:52:09,963 INFO L226 Difference]: Without dead ends: 131 [2021-06-05 21:52:09,963 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 351.4ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:52:09,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-06-05 21:52:09,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2021-06-05 21:52:09,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.23) internal successors, (223), 100 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:09,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 223 transitions. [2021-06-05 21:52:09,964 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 223 transitions. Word has length 17 [2021-06-05 21:52:09,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:09,964 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 223 transitions. [2021-06-05 21:52:09,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:09,964 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 223 transitions. [2021-06-05 21:52:09,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:09,965 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:09,965 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:10,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable708,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:10,165 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:10,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:10,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1254677194, now seen corresponding path program 125 times [2021-06-05 21:52:10,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:10,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129968578] [2021-06-05 21:52:10,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:10,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:10,241 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:10,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:10,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129968578] [2021-06-05 21:52:10,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129968578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:10,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703492689] [2021-06-05 21:52:10,241 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:10,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:52:10,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:10,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:10,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:10,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:10,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:10,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:52:10,382 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:10,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:10,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:10,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:52:10,386 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:10,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:10,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:10,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:52:10,389 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:10,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:10,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:52:10,393 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:10,425 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 21:52:10,425 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:52:10,426 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:52:10,426 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 21:52:10,450 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:10,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703492689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:10,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:10,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:52:10,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775142645] [2021-06-05 21:52:10,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:52:10,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:10,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:52:10,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:10,451 INFO L87 Difference]: Start difference. First operand 101 states and 223 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:10,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:10,740 INFO L93 Difference]: Finished difference Result 136 states and 281 transitions. [2021-06-05 21:52:10,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:52:10,740 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:10,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:10,740 INFO L225 Difference]: With dead ends: 136 [2021-06-05 21:52:10,740 INFO L226 Difference]: Without dead ends: 136 [2021-06-05 21:52:10,741 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 307.1ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:52:10,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-06-05 21:52:10,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 100. [2021-06-05 21:52:10,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.2323232323232323) internal successors, (221), 99 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:10,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 221 transitions. [2021-06-05 21:52:10,742 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 221 transitions. Word has length 17 [2021-06-05 21:52:10,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:10,742 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 221 transitions. [2021-06-05 21:52:10,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:10,742 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 221 transitions. [2021-06-05 21:52:10,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:10,742 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:10,742 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:10,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable718,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:10,943 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:10,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:10,943 INFO L82 PathProgramCache]: Analyzing trace with hash -978374800, now seen corresponding path program 126 times [2021-06-05 21:52:10,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:10,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847019376] [2021-06-05 21:52:10,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:10,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:11,026 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:11,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:11,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847019376] [2021-06-05 21:52:11,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847019376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:11,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863196998] [2021-06-05 21:52:11,027 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:11,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 21:52:11,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:11,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:52:11,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:11,154 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:11,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863196998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:11,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:11,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:52:11,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549871493] [2021-06-05 21:52:11,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:52:11,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:11,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:52:11,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:11,155 INFO L87 Difference]: Start difference. First operand 100 states and 221 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:11,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:11,303 INFO L93 Difference]: Finished difference Result 111 states and 237 transitions. [2021-06-05 21:52:11,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:52:11,303 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:11,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:11,304 INFO L225 Difference]: With dead ends: 111 [2021-06-05 21:52:11,304 INFO L226 Difference]: Without dead ends: 107 [2021-06-05 21:52:11,304 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 205.5ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:52:11,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-06-05 21:52:11,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 100. [2021-06-05 21:52:11,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.2222222222222223) internal successors, (220), 99 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:11,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 220 transitions. [2021-06-05 21:52:11,305 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 220 transitions. Word has length 17 [2021-06-05 21:52:11,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:11,305 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 220 transitions. [2021-06-05 21:52:11,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:11,305 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 220 transitions. [2021-06-05 21:52:11,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:11,305 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:11,305 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:11,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable730 [2021-06-05 21:52:11,506 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:11,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:11,506 INFO L82 PathProgramCache]: Analyzing trace with hash -891493566, now seen corresponding path program 127 times [2021-06-05 21:52:11,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:11,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619149448] [2021-06-05 21:52:11,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:11,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:11,570 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:11,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:11,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619149448] [2021-06-05 21:52:11,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619149448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:11,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309565016] [2021-06-05 21:52:11,570 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:11,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:11,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:11,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:11,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:11,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:11,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:52:11,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:11,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:11,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:52:11,700 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:11,713 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-06-05 21:52:11,714 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:52:11,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:52:11,714 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-06-05 21:52:11,720 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:11,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309565016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:11,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:11,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:52:11,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633279746] [2021-06-05 21:52:11,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:52:11,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:11,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:52:11,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:11,721 INFO L87 Difference]: Start difference. First operand 100 states and 220 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:11,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:11,941 INFO L93 Difference]: Finished difference Result 123 states and 262 transitions. [2021-06-05 21:52:11,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:52:11,941 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:11,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:11,942 INFO L225 Difference]: With dead ends: 123 [2021-06-05 21:52:11,942 INFO L226 Difference]: Without dead ends: 123 [2021-06-05 21:52:11,942 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 259.4ms TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:52:11,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-06-05 21:52:11,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 99. [2021-06-05 21:52:11,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.2244897959183674) internal successors, (218), 98 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:11,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 218 transitions. [2021-06-05 21:52:11,943 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 218 transitions. Word has length 17 [2021-06-05 21:52:11,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:11,943 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 218 transitions. [2021-06-05 21:52:11,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:11,943 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 218 transitions. [2021-06-05 21:52:11,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:11,943 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:11,943 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:12,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable734 [2021-06-05 21:52:12,144 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:12,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:12,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1484721066, now seen corresponding path program 128 times [2021-06-05 21:52:12,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:12,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686698813] [2021-06-05 21:52:12,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:12,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:12,200 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:12,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:12,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686698813] [2021-06-05 21:52:12,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686698813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:12,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958067196] [2021-06-05 21:52:12,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:12,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:52:12,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:12,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:52:12,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:12,321 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:12,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958067196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:12,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:12,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:52:12,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132827554] [2021-06-05 21:52:12,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:52:12,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:12,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:52:12,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:12,322 INFO L87 Difference]: Start difference. First operand 99 states and 218 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:12,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:12,404 INFO L93 Difference]: Finished difference Result 108 states and 231 transitions. [2021-06-05 21:52:12,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:52:12,404 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:12,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:12,404 INFO L225 Difference]: With dead ends: 108 [2021-06-05 21:52:12,404 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 21:52:12,404 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 134.5ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:52:12,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 21:52:12,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2021-06-05 21:52:12,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.2142857142857144) internal successors, (217), 98 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:12,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 217 transitions. [2021-06-05 21:52:12,405 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 217 transitions. Word has length 17 [2021-06-05 21:52:12,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:12,405 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 217 transitions. [2021-06-05 21:52:12,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:12,406 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 217 transitions. [2021-06-05 21:52:12,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:12,406 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:12,406 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:12,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable738 [2021-06-05 21:52:12,611 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:12,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:12,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1296689610, now seen corresponding path program 129 times [2021-06-05 21:52:12,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:12,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973555344] [2021-06-05 21:52:12,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:12,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:12,666 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:12,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:12,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973555344] [2021-06-05 21:52:12,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973555344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:12,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671747623] [2021-06-05 21:52:12,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:12,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:52:12,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:12,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:52:12,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:12,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:12,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:12,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:52:12,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:12,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:12,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:52:12,772 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:12,789 INFO L628 ElimStorePlain]: treesize reduction 36, result has 32.1 percent of original size [2021-06-05 21:52:12,789 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:52:12,790 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:52:12,790 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-06-05 21:52:12,807 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:12,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671747623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:12,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:12,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 21:52:12,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786132031] [2021-06-05 21:52:12,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:52:12,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:12,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:52:12,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:52:12,808 INFO L87 Difference]: Start difference. First operand 99 states and 217 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:12,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:12,877 INFO L93 Difference]: Finished difference Result 111 states and 238 transitions. [2021-06-05 21:52:12,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:52:12,877 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:12,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:12,878 INFO L225 Difference]: With dead ends: 111 [2021-06-05 21:52:12,878 INFO L226 Difference]: Without dead ends: 111 [2021-06-05 21:52:12,878 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 113.8ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:52:12,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-06-05 21:52:12,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 94. [2021-06-05 21:52:12,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.204301075268817) internal successors, (205), 93 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:12,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 205 transitions. [2021-06-05 21:52:12,879 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 205 transitions. Word has length 17 [2021-06-05 21:52:12,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:12,879 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 205 transitions. [2021-06-05 21:52:12,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:12,879 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 205 transitions. [2021-06-05 21:52:12,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:12,879 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:12,879 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:13,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable742 [2021-06-05 21:52:13,089 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:13,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:13,089 INFO L82 PathProgramCache]: Analyzing trace with hash -960002918, now seen corresponding path program 130 times [2021-06-05 21:52:13,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:13,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927218611] [2021-06-05 21:52:13,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:13,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:13,147 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:13,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:13,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927218611] [2021-06-05 21:52:13,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927218611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:13,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350810617] [2021-06-05 21:52:13,147 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:13,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:52:13,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:13,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:13,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:13,260 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:13,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350810617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:13,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:13,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:52:13,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893254405] [2021-06-05 21:52:13,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:52:13,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:13,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:52:13,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:13,261 INFO L87 Difference]: Start difference. First operand 94 states and 205 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:13,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:13,406 INFO L93 Difference]: Finished difference Result 107 states and 225 transitions. [2021-06-05 21:52:13,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:52:13,406 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:13,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:13,406 INFO L225 Difference]: With dead ends: 107 [2021-06-05 21:52:13,406 INFO L226 Difference]: Without dead ends: 98 [2021-06-05 21:52:13,407 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 191.2ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:52:13,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-06-05 21:52:13,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2021-06-05 21:52:13,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.193548387096774) internal successors, (204), 93 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:13,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 204 transitions. [2021-06-05 21:52:13,408 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 204 transitions. Word has length 17 [2021-06-05 21:52:13,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:13,408 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 204 transitions. [2021-06-05 21:52:13,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:13,408 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 204 transitions. [2021-06-05 21:52:13,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:13,408 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:13,408 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:13,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable743,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:13,613 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:13,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:13,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1409778866, now seen corresponding path program 131 times [2021-06-05 21:52:13,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:13,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711888683] [2021-06-05 21:52:13,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:13,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:13,686 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:13,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:13,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711888683] [2021-06-05 21:52:13,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711888683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:13,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96070717] [2021-06-05 21:52:13,687 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:13,711 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:52:13,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:13,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:13,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:13,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:13,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:13,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:52:13,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:13,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:13,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:52:13,804 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:13,818 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-06-05 21:52:13,818 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:52:13,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:52:13,819 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-06-05 21:52:13,833 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:13,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96070717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:13,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:13,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 21:52:13,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017198317] [2021-06-05 21:52:13,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:52:13,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:13,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:52:13,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:52:13,833 INFO L87 Difference]: Start difference. First operand 94 states and 204 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:13,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:13,921 INFO L93 Difference]: Finished difference Result 106 states and 228 transitions. [2021-06-05 21:52:13,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:52:13,922 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:13,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:13,922 INFO L225 Difference]: With dead ends: 106 [2021-06-05 21:52:13,922 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 21:52:13,922 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 118.1ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:52:13,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 21:52:13,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 94. [2021-06-05 21:52:13,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.193548387096774) internal successors, (204), 93 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:13,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 204 transitions. [2021-06-05 21:52:13,923 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 204 transitions. Word has length 17 [2021-06-05 21:52:13,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:13,923 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 204 transitions. [2021-06-05 21:52:13,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:13,923 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 204 transitions. [2021-06-05 21:52:13,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:13,924 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:13,924 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:14,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable747,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:14,133 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:14,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:14,133 INFO L82 PathProgramCache]: Analyzing trace with hash -7649710, now seen corresponding path program 132 times [2021-06-05 21:52:14,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:14,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990676367] [2021-06-05 21:52:14,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:14,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:14,207 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:14,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:14,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990676367] [2021-06-05 21:52:14,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990676367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:14,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928784657] [2021-06-05 21:52:14,207 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:14,236 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 21:52:14,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:14,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:14,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:14,353 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:14,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928784657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:14,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:14,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:52:14,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986858136] [2021-06-05 21:52:14,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:52:14,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:14,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:52:14,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:14,354 INFO L87 Difference]: Start difference. First operand 94 states and 204 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:14,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:14,594 INFO L93 Difference]: Finished difference Result 101 states and 214 transitions. [2021-06-05 21:52:14,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:52:14,594 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:14,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:14,595 INFO L225 Difference]: With dead ends: 101 [2021-06-05 21:52:14,595 INFO L226 Difference]: Without dead ends: 95 [2021-06-05 21:52:14,595 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 299.0ms TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:52:14,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-06-05 21:52:14,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-06-05 21:52:14,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.1914893617021276) internal successors, (206), 94 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:14,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 206 transitions. [2021-06-05 21:52:14,596 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 206 transitions. Word has length 17 [2021-06-05 21:52:14,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:14,596 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 206 transitions. [2021-06-05 21:52:14,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:14,596 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 206 transitions. [2021-06-05 21:52:14,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:14,596 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:14,596 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:14,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable751 [2021-06-05 21:52:14,797 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:14,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:14,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1640409374, now seen corresponding path program 133 times [2021-06-05 21:52:14,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:14,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013283809] [2021-06-05 21:52:14,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:14,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:14,866 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:14,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:14,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013283809] [2021-06-05 21:52:14,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013283809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:14,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342740030] [2021-06-05 21:52:14,867 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:14,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:14,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:14,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:15,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:15,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:15,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:52:15,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:15,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:15,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:52:15,031 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:15,045 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-06-05 21:52:15,045 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:52:15,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:52:15,046 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-06-05 21:52:15,050 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:15,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342740030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:15,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:15,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:52:15,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441684015] [2021-06-05 21:52:15,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:52:15,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:15,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:52:15,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:15,050 INFO L87 Difference]: Start difference. First operand 95 states and 206 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:15,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:15,276 INFO L93 Difference]: Finished difference Result 119 states and 254 transitions. [2021-06-05 21:52:15,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:52:15,277 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:15,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:15,277 INFO L225 Difference]: With dead ends: 119 [2021-06-05 21:52:15,277 INFO L226 Difference]: Without dead ends: 119 [2021-06-05 21:52:15,277 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 266.4ms TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:52:15,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-05 21:52:15,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 95. [2021-06-05 21:52:15,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.1914893617021276) internal successors, (206), 94 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:15,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 206 transitions. [2021-06-05 21:52:15,278 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 206 transitions. Word has length 17 [2021-06-05 21:52:15,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:15,278 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 206 transitions. [2021-06-05 21:52:15,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:15,278 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 206 transitions. [2021-06-05 21:52:15,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:15,279 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:15,279 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:15,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable755 [2021-06-05 21:52:15,479 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:15,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:15,479 INFO L82 PathProgramCache]: Analyzing trace with hash 854355354, now seen corresponding path program 134 times [2021-06-05 21:52:15,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:15,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722460860] [2021-06-05 21:52:15,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:15,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:15,547 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:15,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:15,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722460860] [2021-06-05 21:52:15,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722460860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:15,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780873855] [2021-06-05 21:52:15,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:15,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:52:15,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:15,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:15,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:15,704 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:15,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780873855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:15,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:15,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:52:15,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328611581] [2021-06-05 21:52:15,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:52:15,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:15,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:52:15,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:15,705 INFO L87 Difference]: Start difference. First operand 95 states and 206 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:15,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:15,991 INFO L93 Difference]: Finished difference Result 121 states and 248 transitions. [2021-06-05 21:52:15,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:52:15,991 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:15,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:15,991 INFO L225 Difference]: With dead ends: 121 [2021-06-05 21:52:15,991 INFO L226 Difference]: Without dead ends: 118 [2021-06-05 21:52:15,991 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 318.0ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:52:15,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-06-05 21:52:15,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 100. [2021-06-05 21:52:15,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.202020202020202) internal successors, (218), 99 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:15,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 218 transitions. [2021-06-05 21:52:15,992 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 218 transitions. Word has length 17 [2021-06-05 21:52:15,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:15,993 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 218 transitions. [2021-06-05 21:52:15,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:15,993 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 218 transitions. [2021-06-05 21:52:15,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:15,993 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:15,993 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:16,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable759,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:16,193 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:16,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:16,194 INFO L82 PathProgramCache]: Analyzing trace with hash 630423886, now seen corresponding path program 135 times [2021-06-05 21:52:16,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:16,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658693298] [2021-06-05 21:52:16,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:16,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:16,252 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:16,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:16,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658693298] [2021-06-05 21:52:16,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658693298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:16,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24650305] [2021-06-05 21:52:16,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:16,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:52:16,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:16,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:16,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:16,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:16,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:16,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:52:16,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:16,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:16,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:16,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:52:16,384 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:16,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:16,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:16,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:52:16,387 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:16,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:16,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:52:16,390 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:16,422 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 21:52:16,422 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:52:16,423 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:52:16,423 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 21:52:16,457 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:16,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24650305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:16,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:16,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 21:52:16,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947421774] [2021-06-05 21:52:16,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:52:16,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:16,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:52:16,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:52:16,458 INFO L87 Difference]: Start difference. First operand 100 states and 218 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:16,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:16,880 INFO L93 Difference]: Finished difference Result 140 states and 289 transitions. [2021-06-05 21:52:16,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:52:16,881 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:16,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:16,881 INFO L225 Difference]: With dead ends: 140 [2021-06-05 21:52:16,881 INFO L226 Difference]: Without dead ends: 140 [2021-06-05 21:52:16,881 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 395.6ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:52:16,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-06-05 21:52:16,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 100. [2021-06-05 21:52:16,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.202020202020202) internal successors, (218), 99 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:16,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 218 transitions. [2021-06-05 21:52:16,882 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 218 transitions. Word has length 17 [2021-06-05 21:52:16,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:16,882 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 218 transitions. [2021-06-05 21:52:16,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:16,883 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 218 transitions. [2021-06-05 21:52:16,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:16,883 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:16,883 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:17,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable771 [2021-06-05 21:52:17,083 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:17,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:17,083 INFO L82 PathProgramCache]: Analyzing trace with hash -780366946, now seen corresponding path program 136 times [2021-06-05 21:52:17,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:17,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398276825] [2021-06-05 21:52:17,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:17,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:17,151 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:17,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:17,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398276825] [2021-06-05 21:52:17,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398276825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:17,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398346885] [2021-06-05 21:52:17,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:17,175 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:52:17,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:17,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:17,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:17,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:17,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:17,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:52:17,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:17,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:17,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:17,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:52:17,277 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:17,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:17,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:17,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:52:17,280 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:17,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:17,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:52:17,283 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:17,314 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 21:52:17,315 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:52:17,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:52:17,315 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 21:52:17,340 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:17,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398346885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:17,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:17,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:52:17,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26207022] [2021-06-05 21:52:17,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:52:17,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:17,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:52:17,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:17,341 INFO L87 Difference]: Start difference. First operand 100 states and 218 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:17,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:17,607 INFO L93 Difference]: Finished difference Result 117 states and 248 transitions. [2021-06-05 21:52:17,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:52:17,607 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:17,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:17,608 INFO L225 Difference]: With dead ends: 117 [2021-06-05 21:52:17,608 INFO L226 Difference]: Without dead ends: 115 [2021-06-05 21:52:17,608 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 306.0ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:52:17,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-06-05 21:52:17,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 100. [2021-06-05 21:52:17,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.191919191919192) internal successors, (217), 99 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:17,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 217 transitions. [2021-06-05 21:52:17,609 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 217 transitions. Word has length 17 [2021-06-05 21:52:17,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:17,609 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 217 transitions. [2021-06-05 21:52:17,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:17,609 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 217 transitions. [2021-06-05 21:52:17,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:17,609 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:17,609 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:17,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable783 [2021-06-05 21:52:17,810 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:17,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:17,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1990540626, now seen corresponding path program 137 times [2021-06-05 21:52:17,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:17,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771006215] [2021-06-05 21:52:17,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:17,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:17,882 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:17,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:17,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771006215] [2021-06-05 21:52:17,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771006215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:17,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961799068] [2021-06-05 21:52:17,883 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:17,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:52:17,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:17,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:17,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:18,027 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:18,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961799068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:18,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:18,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:52:18,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104708607] [2021-06-05 21:52:18,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:52:18,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:18,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:52:18,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:18,028 INFO L87 Difference]: Start difference. First operand 100 states and 217 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:18,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:18,237 INFO L93 Difference]: Finished difference Result 104 states and 223 transitions. [2021-06-05 21:52:18,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:52:18,238 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:18,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:18,238 INFO L225 Difference]: With dead ends: 104 [2021-06-05 21:52:18,238 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 21:52:18,238 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 249.7ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:52:18,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 21:52:18,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2021-06-05 21:52:18,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.1956521739130435) internal successors, (202), 92 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:18,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 202 transitions. [2021-06-05 21:52:18,239 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 202 transitions. Word has length 17 [2021-06-05 21:52:18,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:18,239 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 202 transitions. [2021-06-05 21:52:18,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:18,239 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 202 transitions. [2021-06-05 21:52:18,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:18,240 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:18,240 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:18,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable796 [2021-06-05 21:52:18,440 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:18,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:18,441 INFO L82 PathProgramCache]: Analyzing trace with hash -893447990, now seen corresponding path program 138 times [2021-06-05 21:52:18,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:18,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214977535] [2021-06-05 21:52:18,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:18,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:18,509 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:18,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:18,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214977535] [2021-06-05 21:52:18,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214977535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:18,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9548961] [2021-06-05 21:52:18,509 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:18,533 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 21:52:18,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:18,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:18,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:18,619 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:18,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9548961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:18,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:18,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:52:18,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586855498] [2021-06-05 21:52:18,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:52:18,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:18,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:52:18,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:18,620 INFO L87 Difference]: Start difference. First operand 93 states and 202 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:18,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:18,794 INFO L93 Difference]: Finished difference Result 99 states and 209 transitions. [2021-06-05 21:52:18,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:52:18,795 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:18,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:18,795 INFO L225 Difference]: With dead ends: 99 [2021-06-05 21:52:18,795 INFO L226 Difference]: Without dead ends: 93 [2021-06-05 21:52:18,795 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 225.3ms TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:52:18,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-06-05 21:52:18,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-06-05 21:52:18,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.1868131868131866) internal successors, (199), 91 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:18,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 199 transitions. [2021-06-05 21:52:18,796 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 199 transitions. Word has length 17 [2021-06-05 21:52:18,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:18,796 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 199 transitions. [2021-06-05 21:52:18,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:18,796 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 199 transitions. [2021-06-05 21:52:18,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:18,796 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:18,796 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:18,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable808,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:18,997 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:18,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:18,997 INFO L82 PathProgramCache]: Analyzing trace with hash 754611094, now seen corresponding path program 139 times [2021-06-05 21:52:18,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:18,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843535066] [2021-06-05 21:52:18,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:19,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:19,072 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:19,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:19,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843535066] [2021-06-05 21:52:19,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843535066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:19,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143682324] [2021-06-05 21:52:19,073 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:19,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:19,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:19,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:19,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:19,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:19,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:52:19,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:19,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:19,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:52:19,186 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:19,201 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-06-05 21:52:19,201 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:52:19,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:52:19,201 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-06-05 21:52:19,214 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:19,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143682324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:19,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:19,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 21:52:19,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838463389] [2021-06-05 21:52:19,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:52:19,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:19,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:52:19,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:52:19,215 INFO L87 Difference]: Start difference. First operand 92 states and 199 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:19,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:19,328 INFO L93 Difference]: Finished difference Result 111 states and 237 transitions. [2021-06-05 21:52:19,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:52:19,328 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:19,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:19,329 INFO L225 Difference]: With dead ends: 111 [2021-06-05 21:52:19,329 INFO L226 Difference]: Without dead ends: 111 [2021-06-05 21:52:19,329 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 149.6ms TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:52:19,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-06-05 21:52:19,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 93. [2021-06-05 21:52:19,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.1847826086956523) internal successors, (201), 92 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:19,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 201 transitions. [2021-06-05 21:52:19,330 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 201 transitions. Word has length 17 [2021-06-05 21:52:19,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:19,330 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 201 transitions. [2021-06-05 21:52:19,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:19,330 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 201 transitions. [2021-06-05 21:52:19,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:19,330 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:19,330 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:19,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable812,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:19,531 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:19,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:19,531 INFO L82 PathProgramCache]: Analyzing trace with hash -31442926, now seen corresponding path program 140 times [2021-06-05 21:52:19,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:19,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230803703] [2021-06-05 21:52:19,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:19,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:19,610 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:19,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:19,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230803703] [2021-06-05 21:52:19,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230803703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:19,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74038124] [2021-06-05 21:52:19,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:19,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:52:19,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:19,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:19,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:19,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:19,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74038124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:19,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:19,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:52:19,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511550745] [2021-06-05 21:52:19,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:52:19,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:19,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:52:19,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:19,770 INFO L87 Difference]: Start difference. First operand 93 states and 201 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:20,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:20,015 INFO L93 Difference]: Finished difference Result 117 states and 239 transitions. [2021-06-05 21:52:20,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:52:20,016 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:20,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:20,016 INFO L225 Difference]: With dead ends: 117 [2021-06-05 21:52:20,016 INFO L226 Difference]: Without dead ends: 114 [2021-06-05 21:52:20,016 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 256.5ms TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:52:20,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-06-05 21:52:20,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 98. [2021-06-05 21:52:20,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.185567010309278) internal successors, (212), 97 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:20,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 212 transitions. [2021-06-05 21:52:20,017 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 212 transitions. Word has length 17 [2021-06-05 21:52:20,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:20,017 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 212 transitions. [2021-06-05 21:52:20,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:20,017 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 212 transitions. [2021-06-05 21:52:20,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:20,018 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:20,018 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:20,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable816,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:20,218 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:20,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:20,218 INFO L82 PathProgramCache]: Analyzing trace with hash -255374394, now seen corresponding path program 141 times [2021-06-05 21:52:20,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:20,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362604769] [2021-06-05 21:52:20,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:20,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:20,279 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:20,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:20,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362604769] [2021-06-05 21:52:20,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362604769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:20,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207981836] [2021-06-05 21:52:20,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:20,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:52:20,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:20,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:20,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:20,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:20,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:20,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:52:20,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:20,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:20,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:20,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:52:20,412 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:20,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:20,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:20,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:52:20,415 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:20,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:20,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:52:20,418 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:20,450 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 21:52:20,451 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:52:20,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:52:20,452 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 21:52:20,487 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:20,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207981836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:20,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:20,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 21:52:20,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380407826] [2021-06-05 21:52:20,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:52:20,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:20,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:52:20,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:52:20,488 INFO L87 Difference]: Start difference. First operand 98 states and 212 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:20,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:20,729 INFO L93 Difference]: Finished difference Result 128 states and 272 transitions. [2021-06-05 21:52:20,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:52:20,730 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:20,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:20,730 INFO L225 Difference]: With dead ends: 128 [2021-06-05 21:52:20,730 INFO L226 Difference]: Without dead ends: 128 [2021-06-05 21:52:20,730 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 262.1ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:52:20,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-06-05 21:52:20,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 98. [2021-06-05 21:52:20,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.185567010309278) internal successors, (212), 97 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:20,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 212 transitions. [2021-06-05 21:52:20,731 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 212 transitions. Word has length 17 [2021-06-05 21:52:20,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:20,731 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 212 transitions. [2021-06-05 21:52:20,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:20,732 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 212 transitions. [2021-06-05 21:52:20,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:20,732 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:20,732 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:20,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable828,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:20,932 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:20,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:20,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1104742346, now seen corresponding path program 142 times [2021-06-05 21:52:20,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:20,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153470255] [2021-06-05 21:52:20,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:20,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:20,996 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:20,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:20,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153470255] [2021-06-05 21:52:20,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153470255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:20,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071948278] [2021-06-05 21:52:20,996 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:21,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:52:21,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:21,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:21,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:21,119 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:21,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071948278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:21,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:21,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:52:21,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233353434] [2021-06-05 21:52:21,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:52:21,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:21,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:52:21,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:21,120 INFO L87 Difference]: Start difference. First operand 98 states and 212 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:21,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:21,276 INFO L93 Difference]: Finished difference Result 102 states and 218 transitions. [2021-06-05 21:52:21,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:52:21,276 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:21,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:21,277 INFO L225 Difference]: With dead ends: 102 [2021-06-05 21:52:21,277 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 21:52:21,277 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 203.6ms TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:52:21,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 21:52:21,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 92. [2021-06-05 21:52:21,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.1868131868131866) internal successors, (199), 91 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:21,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 199 transitions. [2021-06-05 21:52:21,278 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 199 transitions. Word has length 17 [2021-06-05 21:52:21,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:21,278 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 199 transitions. [2021-06-05 21:52:21,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:21,278 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 199 transitions. [2021-06-05 21:52:21,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:21,278 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:21,278 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:21,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable840 [2021-06-05 21:52:21,494 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:21,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:21,494 INFO L82 PathProgramCache]: Analyzing trace with hash -2138227046, now seen corresponding path program 143 times [2021-06-05 21:52:21,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:21,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816901517] [2021-06-05 21:52:21,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:21,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:21,546 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:21,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:21,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816901517] [2021-06-05 21:52:21,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816901517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:21,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971840851] [2021-06-05 21:52:21,546 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:21,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:52:21,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:21,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:21,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:21,691 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:21,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971840851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:21,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:21,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:52:21,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343228325] [2021-06-05 21:52:21,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:52:21,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:21,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:52:21,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:21,692 INFO L87 Difference]: Start difference. First operand 92 states and 199 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:21,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:21,792 INFO L93 Difference]: Finished difference Result 129 states and 261 transitions. [2021-06-05 21:52:21,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:52:21,792 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:21,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:21,792 INFO L225 Difference]: With dead ends: 129 [2021-06-05 21:52:21,792 INFO L226 Difference]: Without dead ends: 126 [2021-06-05 21:52:21,793 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 118.2ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:52:21,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-05 21:52:21,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 97. [2021-06-05 21:52:21,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.1875) internal successors, (210), 96 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:21,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 210 transitions. [2021-06-05 21:52:21,794 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 210 transitions. Word has length 17 [2021-06-05 21:52:21,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:21,794 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 210 transitions. [2021-06-05 21:52:21,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:21,794 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 210 transitions. [2021-06-05 21:52:21,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:21,794 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:21,794 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:22,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable850 [2021-06-05 21:52:22,005 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:22,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:22,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1712089544, now seen corresponding path program 144 times [2021-06-05 21:52:22,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:22,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349358509] [2021-06-05 21:52:22,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:22,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:22,082 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:22,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:22,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349358509] [2021-06-05 21:52:22,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349358509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:22,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184995318] [2021-06-05 21:52:22,082 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:22,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:52:22,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:22,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:52:22,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:22,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:22,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:22,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:52:22,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:22,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:22,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:52:22,204 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:22,250 INFO L628 ElimStorePlain]: treesize reduction 86, result has 34.4 percent of original size [2021-06-05 21:52:22,250 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:52:22,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 21:52:22,253 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:22,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:52:22,270 INFO L518 ElimStorePlain]: Eliminatee v_prenex_115 vanished before elimination [2021-06-05 21:52:22,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:52:22,271 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-06-05 21:52:22,309 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:22,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184995318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:22,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:22,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 21:52:22,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491556568] [2021-06-05 21:52:22,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:52:22,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:22,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:52:22,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:52:22,310 INFO L87 Difference]: Start difference. First operand 97 states and 210 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:22,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:22,418 INFO L93 Difference]: Finished difference Result 125 states and 258 transitions. [2021-06-05 21:52:22,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:52:22,418 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:22,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:22,419 INFO L225 Difference]: With dead ends: 125 [2021-06-05 21:52:22,419 INFO L226 Difference]: Without dead ends: 125 [2021-06-05 21:52:22,419 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 144.3ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:52:22,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-06-05 21:52:22,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 97. [2021-06-05 21:52:22,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.1875) internal successors, (210), 96 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:22,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 210 transitions. [2021-06-05 21:52:22,420 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 210 transitions. Word has length 17 [2021-06-05 21:52:22,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:22,420 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 210 transitions. [2021-06-05 21:52:22,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:22,420 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 210 transitions. [2021-06-05 21:52:22,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:22,420 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:22,420 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:22,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable863 [2021-06-05 21:52:22,621 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:22,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:22,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1002041774, now seen corresponding path program 145 times [2021-06-05 21:52:22,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:22,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569723641] [2021-06-05 21:52:22,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:22,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:22,678 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:22,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:22,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569723641] [2021-06-05 21:52:22,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569723641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:22,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939232867] [2021-06-05 21:52:22,678 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:22,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:22,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:22,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:22,833 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:22,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939232867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:22,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:22,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:52:22,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464687834] [2021-06-05 21:52:22,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:52:22,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:22,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:52:22,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:22,834 INFO L87 Difference]: Start difference. First operand 97 states and 210 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:22,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:22,973 INFO L93 Difference]: Finished difference Result 134 states and 273 transitions. [2021-06-05 21:52:22,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:52:22,973 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:22,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:22,973 INFO L225 Difference]: With dead ends: 134 [2021-06-05 21:52:22,973 INFO L226 Difference]: Without dead ends: 134 [2021-06-05 21:52:22,973 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 134.9ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:52:22,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-06-05 21:52:22,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 96. [2021-06-05 21:52:22,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.1894736842105265) internal successors, (208), 95 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:22,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 208 transitions. [2021-06-05 21:52:22,975 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 208 transitions. Word has length 17 [2021-06-05 21:52:22,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:22,975 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 208 transitions. [2021-06-05 21:52:22,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:22,975 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 208 transitions. [2021-06-05 21:52:22,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:22,975 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:22,975 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:23,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable867,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:23,175 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:23,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:23,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1059873528, now seen corresponding path program 146 times [2021-06-05 21:52:23,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:23,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270471249] [2021-06-05 21:52:23,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:23,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:23,241 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:23,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:23,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270471249] [2021-06-05 21:52:23,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270471249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:23,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843084533] [2021-06-05 21:52:23,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:23,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:52:23,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:23,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:52:23,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:23,373 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:23,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843084533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:23,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:23,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:52:23,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502385072] [2021-06-05 21:52:23,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:52:23,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:23,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:52:23,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:23,373 INFO L87 Difference]: Start difference. First operand 96 states and 208 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:23,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:23,500 INFO L93 Difference]: Finished difference Result 100 states and 212 transitions. [2021-06-05 21:52:23,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:52:23,500 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:23,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:23,500 INFO L225 Difference]: With dead ends: 100 [2021-06-05 21:52:23,500 INFO L226 Difference]: Without dead ends: 96 [2021-06-05 21:52:23,500 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 152.7ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:52:23,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-06-05 21:52:23,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-06-05 21:52:23,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.1789473684210527) internal successors, (207), 95 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:23,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 207 transitions. [2021-06-05 21:52:23,501 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 207 transitions. Word has length 17 [2021-06-05 21:52:23,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:23,502 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 207 transitions. [2021-06-05 21:52:23,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:23,502 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 207 transitions. [2021-06-05 21:52:23,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:23,502 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:23,502 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:23,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable879,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:23,709 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:23,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:23,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1146754762, now seen corresponding path program 147 times [2021-06-05 21:52:23,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:23,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104234781] [2021-06-05 21:52:23,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:23,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:23,771 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:23,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:23,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104234781] [2021-06-05 21:52:23,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104234781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:23,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351793869] [2021-06-05 21:52:23,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 21:52:23,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:52:23,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:23,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:23,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:23,897 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:23,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351793869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:23,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:23,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:52:23,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476919810] [2021-06-05 21:52:23,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:52:23,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:23,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:52:23,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:23,898 INFO L87 Difference]: Start difference. First operand 96 states and 207 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:24,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:24,010 INFO L93 Difference]: Finished difference Result 108 states and 228 transitions. [2021-06-05 21:52:24,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:52:24,011 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:24,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:24,011 INFO L225 Difference]: With dead ends: 108 [2021-06-05 21:52:24,011 INFO L226 Difference]: Without dead ends: 108 [2021-06-05 21:52:24,011 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 103.0ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:24,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-06-05 21:52:24,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 88. [2021-06-05 21:52:24,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.1724137931034484) internal successors, (189), 87 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:24,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 189 transitions. [2021-06-05 21:52:24,012 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 189 transitions. Word has length 17 [2021-06-05 21:52:24,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:24,012 INFO L482 AbstractCegarLoop]: Abstraction has 88 states and 189 transitions. [2021-06-05 21:52:24,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:24,012 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 189 transitions. [2021-06-05 21:52:24,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:24,013 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:24,013 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:24,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable883 [2021-06-05 21:52:24,221 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:24,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:24,221 INFO L82 PathProgramCache]: Analyzing trace with hash -935331810, now seen corresponding path program 148 times [2021-06-05 21:52:24,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:24,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698874674] [2021-06-05 21:52:24,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:24,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:24,291 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:24,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:24,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698874674] [2021-06-05 21:52:24,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698874674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:24,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208202120] [2021-06-05 21:52:24,291 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:24,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:52:24,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:24,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:24,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:24,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:24,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:24,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:52:24,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:24,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:24,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:52:24,405 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:24,418 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-06-05 21:52:24,419 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:52:24,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:52:24,419 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-06-05 21:52:24,432 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:24,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208202120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:24,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:24,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 21:52:24,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977568735] [2021-06-05 21:52:24,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:52:24,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:24,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:52:24,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:52:24,433 INFO L87 Difference]: Start difference. First operand 88 states and 189 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:24,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:24,566 INFO L93 Difference]: Finished difference Result 107 states and 227 transitions. [2021-06-05 21:52:24,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:52:24,566 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:24,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:24,566 INFO L225 Difference]: With dead ends: 107 [2021-06-05 21:52:24,567 INFO L226 Difference]: Without dead ends: 107 [2021-06-05 21:52:24,567 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 149.6ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:52:24,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-06-05 21:52:24,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 88. [2021-06-05 21:52:24,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.1724137931034484) internal successors, (189), 87 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:24,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 189 transitions. [2021-06-05 21:52:24,568 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 189 transitions. Word has length 17 [2021-06-05 21:52:24,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:24,568 INFO L482 AbstractCegarLoop]: Abstraction has 88 states and 189 transitions. [2021-06-05 21:52:24,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:24,568 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 189 transitions. [2021-06-05 21:52:24,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:24,568 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:24,568 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:24,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable887 [2021-06-05 21:52:24,784 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:24,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:24,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1721385830, now seen corresponding path program 149 times [2021-06-05 21:52:24,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:24,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437517230] [2021-06-05 21:52:24,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:24,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:24,855 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:24,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:24,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437517230] [2021-06-05 21:52:24,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437517230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:24,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381150760] [2021-06-05 21:52:24,856 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:24,881 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:52:24,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:24,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:24,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:24,988 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:24,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381150760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:24,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:24,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:52:24,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669656299] [2021-06-05 21:52:24,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:52:24,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:24,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:52:24,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:24,989 INFO L87 Difference]: Start difference. First operand 88 states and 189 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:25,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:25,211 INFO L93 Difference]: Finished difference Result 113 states and 230 transitions. [2021-06-05 21:52:25,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:52:25,212 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:25,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:25,212 INFO L225 Difference]: With dead ends: 113 [2021-06-05 21:52:25,212 INFO L226 Difference]: Without dead ends: 110 [2021-06-05 21:52:25,212 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 237.4ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:52:25,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-06-05 21:52:25,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 93. [2021-06-05 21:52:25,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.1739130434782608) internal successors, (200), 92 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:25,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 200 transitions. [2021-06-05 21:52:25,213 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 200 transitions. Word has length 17 [2021-06-05 21:52:25,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:25,213 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 200 transitions. [2021-06-05 21:52:25,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:25,213 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 200 transitions. [2021-06-05 21:52:25,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:25,213 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:25,213 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:25,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable891 [2021-06-05 21:52:25,414 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:25,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:25,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1945317298, now seen corresponding path program 150 times [2021-06-05 21:52:25,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:25,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651842734] [2021-06-05 21:52:25,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:25,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:25,476 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:25,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:25,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651842734] [2021-06-05 21:52:25,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651842734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:25,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026394173] [2021-06-05 21:52:25,477 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:25,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:52:25,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:25,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:25,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:25,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:25,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:25,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:52:25,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:25,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:25,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:25,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:52:25,592 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:25,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:25,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:25,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:52:25,595 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:25,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:25,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:52:25,598 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:25,629 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 21:52:25,629 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:52:25,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:52:25,630 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 21:52:25,664 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:25,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026394173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:25,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:25,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 21:52:25,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900046001] [2021-06-05 21:52:25,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:52:25,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:25,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:52:25,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:52:25,665 INFO L87 Difference]: Start difference. First operand 93 states and 200 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:25,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:25,840 INFO L93 Difference]: Finished difference Result 126 states and 266 transitions. [2021-06-05 21:52:25,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:52:25,840 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:25,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:25,840 INFO L225 Difference]: With dead ends: 126 [2021-06-05 21:52:25,840 INFO L226 Difference]: Without dead ends: 126 [2021-06-05 21:52:25,840 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 167.5ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:52:25,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-05 21:52:25,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 93. [2021-06-05 21:52:25,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.1739130434782608) internal successors, (200), 92 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:25,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 200 transitions. [2021-06-05 21:52:25,842 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 200 transitions. Word has length 17 [2021-06-05 21:52:25,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:25,842 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 200 transitions. [2021-06-05 21:52:25,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:25,842 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 200 transitions. [2021-06-05 21:52:25,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:25,842 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:25,842 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:26,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable903,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:26,043 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:26,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:26,043 INFO L82 PathProgramCache]: Analyzing trace with hash -585200558, now seen corresponding path program 151 times [2021-06-05 21:52:26,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:26,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894828434] [2021-06-05 21:52:26,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:26,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:26,112 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:26,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:26,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894828434] [2021-06-05 21:52:26,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894828434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:26,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483815839] [2021-06-05 21:52:26,112 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:26,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:26,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:26,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:26,247 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:26,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483815839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:26,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:26,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:52:26,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632776421] [2021-06-05 21:52:26,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:52:26,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:26,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:52:26,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:26,248 INFO L87 Difference]: Start difference. First operand 93 states and 200 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:26,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:26,413 INFO L93 Difference]: Finished difference Result 98 states and 209 transitions. [2021-06-05 21:52:26,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:52:26,413 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:26,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:26,413 INFO L225 Difference]: With dead ends: 98 [2021-06-05 21:52:26,414 INFO L226 Difference]: Without dead ends: 98 [2021-06-05 21:52:26,414 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 183.4ms TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:52:26,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-06-05 21:52:26,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2021-06-05 21:52:26,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.1744186046511627) internal successors, (187), 86 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:26,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 187 transitions. [2021-06-05 21:52:26,415 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 187 transitions. Word has length 17 [2021-06-05 21:52:26,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:26,415 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 187 transitions. [2021-06-05 21:52:26,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:26,415 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 187 transitions. [2021-06-05 21:52:26,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:26,415 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:26,415 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:26,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable913 [2021-06-05 21:52:26,615 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:26,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:26,616 INFO L82 PathProgramCache]: Analyzing trace with hash 466797346, now seen corresponding path program 152 times [2021-06-05 21:52:26,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:26,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36480960] [2021-06-05 21:52:26,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:26,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:26,677 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:26,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:26,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36480960] [2021-06-05 21:52:26,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36480960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:26,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280350508] [2021-06-05 21:52:26,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:26,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:52:26,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:26,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:26,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:26,819 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:26,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280350508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:26,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:26,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:52:26,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617564447] [2021-06-05 21:52:26,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:52:26,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:26,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:52:26,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:26,820 INFO L87 Difference]: Start difference. First operand 87 states and 187 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:27,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:27,016 INFO L93 Difference]: Finished difference Result 125 states and 252 transitions. [2021-06-05 21:52:27,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:52:27,017 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:27,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:27,017 INFO L225 Difference]: With dead ends: 125 [2021-06-05 21:52:27,017 INFO L226 Difference]: Without dead ends: 122 [2021-06-05 21:52:27,017 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 223.0ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:52:27,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-06-05 21:52:27,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 94. [2021-06-05 21:52:27,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.193548387096774) internal successors, (204), 93 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:27,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 204 transitions. [2021-06-05 21:52:27,018 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 204 transitions. Word has length 17 [2021-06-05 21:52:27,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:27,018 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 204 transitions. [2021-06-05 21:52:27,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:27,018 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 204 transitions. [2021-06-05 21:52:27,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:27,018 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:27,018 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:27,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable923,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:27,219 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:27,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:27,219 INFO L82 PathProgramCache]: Analyzing trace with hash 242865878, now seen corresponding path program 153 times [2021-06-05 21:52:27,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:27,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070718765] [2021-06-05 21:52:27,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:27,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:27,301 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:27,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:27,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070718765] [2021-06-05 21:52:27,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070718765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:27,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130759624] [2021-06-05 21:52:27,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:27,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:52:27,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:27,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:27,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:27,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:27,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:27,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:52:27,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:27,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:27,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:52:27,427 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:27,466 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-06-05 21:52:27,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 21:52:27,468 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:27,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:52:27,481 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:52:27,481 INFO L518 ElimStorePlain]: Eliminatee v_prenex_117 vanished before elimination [2021-06-05 21:52:27,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:52:27,482 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 21:52:27,517 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:27,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130759624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:27,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:27,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 21:52:27,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382951749] [2021-06-05 21:52:27,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:52:27,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:27,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:52:27,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:52:27,518 INFO L87 Difference]: Start difference. First operand 94 states and 204 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:27,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:27,746 INFO L93 Difference]: Finished difference Result 118 states and 243 transitions. [2021-06-05 21:52:27,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:52:27,746 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:27,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:27,747 INFO L225 Difference]: With dead ends: 118 [2021-06-05 21:52:27,747 INFO L226 Difference]: Without dead ends: 118 [2021-06-05 21:52:27,747 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 272.1ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:52:27,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-06-05 21:52:27,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2021-06-05 21:52:27,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.193548387096774) internal successors, (204), 93 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:27,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 204 transitions. [2021-06-05 21:52:27,748 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 204 transitions. Word has length 17 [2021-06-05 21:52:27,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:27,748 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 204 transitions. [2021-06-05 21:52:27,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:27,748 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 204 transitions. [2021-06-05 21:52:27,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:27,748 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:27,748 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:27,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable934,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:27,949 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:27,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:27,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1602982618, now seen corresponding path program 154 times [2021-06-05 21:52:27,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:27,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177691687] [2021-06-05 21:52:27,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:27,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:28,022 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:28,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:28,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177691687] [2021-06-05 21:52:28,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177691687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:28,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506926708] [2021-06-05 21:52:28,022 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:28,047 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:52:28,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:28,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:28,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:28,172 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:28,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506926708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:28,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:28,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:52:28,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002096267] [2021-06-05 21:52:28,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:52:28,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:28,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:52:28,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:28,173 INFO L87 Difference]: Start difference. First operand 94 states and 204 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:28,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:28,379 INFO L93 Difference]: Finished difference Result 128 states and 261 transitions. [2021-06-05 21:52:28,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:52:28,379 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:28,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:28,379 INFO L225 Difference]: With dead ends: 128 [2021-06-05 21:52:28,379 INFO L226 Difference]: Without dead ends: 128 [2021-06-05 21:52:28,379 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 232.2ms TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:52:28,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-06-05 21:52:28,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 93. [2021-06-05 21:52:28,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.1956521739130435) internal successors, (202), 92 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:28,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 202 transitions. [2021-06-05 21:52:28,381 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 202 transitions. Word has length 17 [2021-06-05 21:52:28,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:28,381 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 202 transitions. [2021-06-05 21:52:28,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:28,381 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 202 transitions. [2021-06-05 21:52:28,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:28,381 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:28,381 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:28,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable941 [2021-06-05 21:52:28,582 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:28,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:28,582 INFO L82 PathProgramCache]: Analyzing trace with hash -630069376, now seen corresponding path program 155 times [2021-06-05 21:52:28,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:28,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396580452] [2021-06-05 21:52:28,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:28,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:28,648 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:28,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:28,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396580452] [2021-06-05 21:52:28,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396580452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:28,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079624563] [2021-06-05 21:52:28,648 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:28,672 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:52:28,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:28,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:28,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:28,778 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:28,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079624563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:28,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:28,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:52:28,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361423466] [2021-06-05 21:52:28,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:52:28,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:28,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:52:28,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:28,779 INFO L87 Difference]: Start difference. First operand 93 states and 202 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:28,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:28,992 INFO L93 Difference]: Finished difference Result 97 states and 206 transitions. [2021-06-05 21:52:28,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:52:28,992 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:28,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:28,993 INFO L225 Difference]: With dead ends: 97 [2021-06-05 21:52:28,993 INFO L226 Difference]: Without dead ends: 93 [2021-06-05 21:52:28,993 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 249.0ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:52:28,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-06-05 21:52:28,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-06-05 21:52:28,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.1847826086956523) internal successors, (201), 92 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:28,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 201 transitions. [2021-06-05 21:52:28,994 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 201 transitions. Word has length 17 [2021-06-05 21:52:28,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:28,994 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 201 transitions. [2021-06-05 21:52:28,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:28,994 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 201 transitions. [2021-06-05 21:52:28,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:28,994 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:28,994 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:29,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable953,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:29,195 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:29,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:29,195 INFO L82 PathProgramCache]: Analyzing trace with hash -543188142, now seen corresponding path program 156 times [2021-06-05 21:52:29,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:29,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938454759] [2021-06-05 21:52:29,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:29,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:29,262 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:29,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:29,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938454759] [2021-06-05 21:52:29,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938454759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:29,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195804593] [2021-06-05 21:52:29,263 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:29,287 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:52:29,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:29,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:29,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:29,383 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:29,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195804593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:29,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:29,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:52:29,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330516216] [2021-06-05 21:52:29,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:52:29,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:29,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:52:29,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:29,384 INFO L87 Difference]: Start difference. First operand 93 states and 201 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:29,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:29,506 INFO L93 Difference]: Finished difference Result 105 states and 222 transitions. [2021-06-05 21:52:29,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:52:29,506 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:29,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:29,506 INFO L225 Difference]: With dead ends: 105 [2021-06-05 21:52:29,506 INFO L226 Difference]: Without dead ends: 105 [2021-06-05 21:52:29,506 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 140.9ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:52:29,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-06-05 21:52:29,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2021-06-05 21:52:29,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.176470588235294) internal successors, (185), 85 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:29,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 185 transitions. [2021-06-05 21:52:29,507 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 185 transitions. Word has length 17 [2021-06-05 21:52:29,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:29,507 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 185 transitions. [2021-06-05 21:52:29,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:29,508 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 185 transitions. [2021-06-05 21:52:29,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:29,508 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:29,508 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:29,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable959,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:29,713 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:29,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:29,713 INFO L82 PathProgramCache]: Analyzing trace with hash -419000934, now seen corresponding path program 157 times [2021-06-05 21:52:29,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:29,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923895483] [2021-06-05 21:52:29,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:29,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:29,783 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:29,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:29,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923895483] [2021-06-05 21:52:29,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923895483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:29,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957431508] [2021-06-05 21:52:29,783 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:29,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:29,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:29,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:29,957 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:29,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957431508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:29,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:29,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:52:29,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129400996] [2021-06-05 21:52:29,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:52:29,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:29,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:52:29,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:29,957 INFO L87 Difference]: Start difference. First operand 86 states and 185 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:30,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:30,237 INFO L93 Difference]: Finished difference Result 123 states and 249 transitions. [2021-06-05 21:52:30,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:52:30,237 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:30,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:30,237 INFO L225 Difference]: With dead ends: 123 [2021-06-05 21:52:30,238 INFO L226 Difference]: Without dead ends: 120 [2021-06-05 21:52:30,238 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 305.3ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:52:30,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-06-05 21:52:30,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 94. [2021-06-05 21:52:30,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.21505376344086) internal successors, (206), 93 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:30,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 206 transitions. [2021-06-05 21:52:30,239 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 206 transitions. Word has length 17 [2021-06-05 21:52:30,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:30,239 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 206 transitions. [2021-06-05 21:52:30,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:30,239 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 206 transitions. [2021-06-05 21:52:30,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:30,239 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:30,239 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:30,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable963 [2021-06-05 21:52:30,440 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:30,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:30,440 INFO L82 PathProgramCache]: Analyzing trace with hash -642932402, now seen corresponding path program 158 times [2021-06-05 21:52:30,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:30,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886916808] [2021-06-05 21:52:30,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:30,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:30,519 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:30,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:30,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886916808] [2021-06-05 21:52:30,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886916808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:30,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654492631] [2021-06-05 21:52:30,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:30,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:52:30,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:30,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:30,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:30,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:30,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:30,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:52:30,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:30,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:30,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:52:30,664 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:30,701 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-06-05 21:52:30,701 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:52:30,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 21:52:30,704 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:30,717 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:52:30,717 INFO L518 ElimStorePlain]: Eliminatee v_prenex_123 vanished before elimination [2021-06-05 21:52:30,718 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:52:30,718 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 21:52:30,744 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:30,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654492631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:30,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:30,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:52:30,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245623617] [2021-06-05 21:52:30,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:52:30,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:30,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:52:30,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:30,745 INFO L87 Difference]: Start difference. First operand 94 states and 206 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:30,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:30,992 INFO L93 Difference]: Finished difference Result 121 states and 250 transitions. [2021-06-05 21:52:30,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:52:30,993 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:30,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:30,993 INFO L225 Difference]: With dead ends: 121 [2021-06-05 21:52:30,993 INFO L226 Difference]: Without dead ends: 121 [2021-06-05 21:52:30,993 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 277.8ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:52:30,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-06-05 21:52:30,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 94. [2021-06-05 21:52:30,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.21505376344086) internal successors, (206), 93 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:30,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 206 transitions. [2021-06-05 21:52:30,994 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 206 transitions. Word has length 17 [2021-06-05 21:52:30,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:30,994 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 206 transitions. [2021-06-05 21:52:30,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:30,994 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 206 transitions. [2021-06-05 21:52:30,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:30,994 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:30,995 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:31,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable976 [2021-06-05 21:52:31,199 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:31,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:31,200 INFO L82 PathProgramCache]: Analyzing trace with hash -2053723234, now seen corresponding path program 159 times [2021-06-05 21:52:31,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:31,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153844750] [2021-06-05 21:52:31,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:31,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:31,270 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:31,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:31,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153844750] [2021-06-05 21:52:31,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153844750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:31,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919920312] [2021-06-05 21:52:31,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:31,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:52:31,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:31,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:31,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:31,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:31,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:31,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:52:31,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:31,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:31,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:52:31,416 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:31,455 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-06-05 21:52:31,455 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:52:31,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 21:52:31,458 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:31,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:52:31,471 INFO L518 ElimStorePlain]: Eliminatee v_prenex_126 vanished before elimination [2021-06-05 21:52:31,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:52:31,471 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 21:52:31,498 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:31,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919920312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:31,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:31,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:52:31,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326624440] [2021-06-05 21:52:31,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:52:31,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:31,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:52:31,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:31,499 INFO L87 Difference]: Start difference. First operand 94 states and 206 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:31,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:31,822 INFO L93 Difference]: Finished difference Result 123 states and 251 transitions. [2021-06-05 21:52:31,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:52:31,822 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:31,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:31,823 INFO L225 Difference]: With dead ends: 123 [2021-06-05 21:52:31,823 INFO L226 Difference]: Without dead ends: 121 [2021-06-05 21:52:31,823 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 325.9ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:52:31,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-06-05 21:52:31,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 94. [2021-06-05 21:52:31,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.204301075268817) internal successors, (205), 93 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:31,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 205 transitions. [2021-06-05 21:52:31,824 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 205 transitions. Word has length 17 [2021-06-05 21:52:31,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:31,824 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 205 transitions. [2021-06-05 21:52:31,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:31,824 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 205 transitions. [2021-06-05 21:52:31,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:31,824 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:31,824 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:32,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable983 [2021-06-05 21:52:32,025 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:32,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:32,025 INFO L82 PathProgramCache]: Analyzing trace with hash 717184338, now seen corresponding path program 160 times [2021-06-05 21:52:32,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:32,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320653467] [2021-06-05 21:52:32,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:32,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:32,082 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:32,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:32,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320653467] [2021-06-05 21:52:32,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320653467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:32,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263217023] [2021-06-05 21:52:32,083 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:32,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:52:32,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:32,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:32,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:32,243 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:32,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263217023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:32,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:32,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:52:32,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322849162] [2021-06-05 21:52:32,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:52:32,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:32,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:52:32,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:32,243 INFO L87 Difference]: Start difference. First operand 94 states and 205 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:32,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:32,583 INFO L93 Difference]: Finished difference Result 126 states and 257 transitions. [2021-06-05 21:52:32,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:52:32,583 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:32,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:32,584 INFO L225 Difference]: With dead ends: 126 [2021-06-05 21:52:32,584 INFO L226 Difference]: Without dead ends: 126 [2021-06-05 21:52:32,584 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 317.0ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:52:32,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-05 21:52:32,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 93. [2021-06-05 21:52:32,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.2065217391304346) internal successors, (203), 92 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:32,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 203 transitions. [2021-06-05 21:52:32,585 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 203 transitions. Word has length 17 [2021-06-05 21:52:32,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:32,585 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 203 transitions. [2021-06-05 21:52:32,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:32,585 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 203 transitions. [2021-06-05 21:52:32,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:32,585 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:32,585 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:32,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable991 [2021-06-05 21:52:32,786 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:32,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:32,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1515867656, now seen corresponding path program 161 times [2021-06-05 21:52:32,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:32,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908275861] [2021-06-05 21:52:32,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:32,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:32,864 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:32,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:32,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908275861] [2021-06-05 21:52:32,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908275861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:32,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512960780] [2021-06-05 21:52:32,865 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:32,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:52:32,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:32,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:32,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:33,013 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:33,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512960780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:33,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:33,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:52:33,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263514408] [2021-06-05 21:52:33,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:52:33,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:33,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:52:33,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:33,013 INFO L87 Difference]: Start difference. First operand 93 states and 203 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:33,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:33,302 INFO L93 Difference]: Finished difference Result 101 states and 213 transitions. [2021-06-05 21:52:33,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:52:33,302 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:33,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:33,302 INFO L225 Difference]: With dead ends: 101 [2021-06-05 21:52:33,303 INFO L226 Difference]: Without dead ends: 97 [2021-06-05 21:52:33,303 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 325.1ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:52:33,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-06-05 21:52:33,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 93. [2021-06-05 21:52:33,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.1956521739130435) internal successors, (202), 92 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:33,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 202 transitions. [2021-06-05 21:52:33,304 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 202 transitions. Word has length 17 [2021-06-05 21:52:33,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:33,304 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 202 transitions. [2021-06-05 21:52:33,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:33,304 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 202 transitions. [2021-06-05 21:52:33,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:33,304 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:33,304 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:33,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1001 [2021-06-05 21:52:33,505 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:33,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:33,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1428986422, now seen corresponding path program 162 times [2021-06-05 21:52:33,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:33,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165434905] [2021-06-05 21:52:33,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:33,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:33,563 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:33,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:33,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165434905] [2021-06-05 21:52:33,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165434905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:33,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954902088] [2021-06-05 21:52:33,563 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:33,587 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:52:33,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:33,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:52:33,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:33,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:33,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:33,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:52:33,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:33,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:33,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:52:33,701 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:33,719 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 21:52:33,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:33,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 21:52:33,722 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:52:33,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:52:33,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:52:33,728 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 21:52:33,745 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:33,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954902088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:33,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:33,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 21:52:33,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172549315] [2021-06-05 21:52:33,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:52:33,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:33,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:52:33,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:52:33,746 INFO L87 Difference]: Start difference. First operand 93 states and 202 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:34,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:34,009 INFO L93 Difference]: Finished difference Result 113 states and 238 transitions. [2021-06-05 21:52:34,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:52:34,009 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:34,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:34,009 INFO L225 Difference]: With dead ends: 113 [2021-06-05 21:52:34,009 INFO L226 Difference]: Without dead ends: 113 [2021-06-05 21:52:34,009 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 287.5ms TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:52:34,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-06-05 21:52:34,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2021-06-05 21:52:34,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.197802197802198) internal successors, (200), 91 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:34,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 200 transitions. [2021-06-05 21:52:34,010 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 200 transitions. Word has length 17 [2021-06-05 21:52:34,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:34,010 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 200 transitions. [2021-06-05 21:52:34,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:34,011 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 200 transitions. [2021-06-05 21:52:34,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:34,011 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:34,011 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:34,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1006,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:34,211 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:34,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:34,212 INFO L82 PathProgramCache]: Analyzing trace with hash -2022213922, now seen corresponding path program 163 times [2021-06-05 21:52:34,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:34,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026532739] [2021-06-05 21:52:34,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:34,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:34,278 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:34,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:34,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026532739] [2021-06-05 21:52:34,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026532739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:34,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240004813] [2021-06-05 21:52:34,279 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:34,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:34,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:34,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:34,416 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:34,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240004813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:34,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:34,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:52:34,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928733606] [2021-06-05 21:52:34,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:52:34,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:34,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:52:34,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:34,417 INFO L87 Difference]: Start difference. First operand 92 states and 200 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:34,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:34,639 INFO L93 Difference]: Finished difference Result 98 states and 207 transitions. [2021-06-05 21:52:34,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:52:34,639 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:34,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:34,639 INFO L225 Difference]: With dead ends: 98 [2021-06-05 21:52:34,639 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 21:52:34,639 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 253.8ms TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:52:34,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 21:52:34,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-06-05 21:52:34,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.1868131868131866) internal successors, (199), 91 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:34,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 199 transitions. [2021-06-05 21:52:34,640 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 199 transitions. Word has length 17 [2021-06-05 21:52:34,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:34,640 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 199 transitions. [2021-06-05 21:52:34,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:34,640 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 199 transitions. [2021-06-05 21:52:34,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:34,641 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:34,641 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:34,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1008 [2021-06-05 21:52:34,841 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:34,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:34,841 INFO L82 PathProgramCache]: Analyzing trace with hash 759196754, now seen corresponding path program 164 times [2021-06-05 21:52:34,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:34,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849935316] [2021-06-05 21:52:34,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:34,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:34,896 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:34,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:34,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849935316] [2021-06-05 21:52:34,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849935316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:34,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507888548] [2021-06-05 21:52:34,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:34,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:52:34,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:34,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:34,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:35,026 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:35,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507888548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:35,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:35,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:52:35,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372831515] [2021-06-05 21:52:35,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:52:35,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:35,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:52:35,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:35,027 INFO L87 Difference]: Start difference. First operand 92 states and 199 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:35,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:35,117 INFO L93 Difference]: Finished difference Result 101 states and 214 transitions. [2021-06-05 21:52:35,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:52:35,117 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:35,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:35,118 INFO L225 Difference]: With dead ends: 101 [2021-06-05 21:52:35,118 INFO L226 Difference]: Without dead ends: 101 [2021-06-05 21:52:35,118 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 112.3ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:35,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-06-05 21:52:35,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 83. [2021-06-05 21:52:35,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.1707317073170733) internal successors, (178), 82 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:35,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 178 transitions. [2021-06-05 21:52:35,119 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 178 transitions. Word has length 17 [2021-06-05 21:52:35,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:35,119 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 178 transitions. [2021-06-05 21:52:35,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:35,119 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 178 transitions. [2021-06-05 21:52:35,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:35,119 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:35,119 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:35,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1013 [2021-06-05 21:52:35,329 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:35,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:35,329 INFO L82 PathProgramCache]: Analyzing trace with hash 438642694, now seen corresponding path program 165 times [2021-06-05 21:52:35,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:35,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699977434] [2021-06-05 21:52:35,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:35,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:35,404 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:35,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:35,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699977434] [2021-06-05 21:52:35,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699977434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:35,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616976593] [2021-06-05 21:52:35,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:35,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:52:35,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:35,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:35,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:35,515 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:35,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616976593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:35,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:35,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 21:52:35,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711733908] [2021-06-05 21:52:35,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:52:35,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:35,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:52:35,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:52:35,516 INFO L87 Difference]: Start difference. First operand 83 states and 178 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:35,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:35,706 INFO L93 Difference]: Finished difference Result 98 states and 203 transitions. [2021-06-05 21:52:35,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:52:35,707 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:35,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:35,707 INFO L225 Difference]: With dead ends: 98 [2021-06-05 21:52:35,707 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 21:52:35,707 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 218.7ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:52:35,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 21:52:35,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 83. [2021-06-05 21:52:35,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.158536585365854) internal successors, (177), 82 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:35,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 177 transitions. [2021-06-05 21:52:35,708 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 177 transitions. Word has length 17 [2021-06-05 21:52:35,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:35,708 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 177 transitions. [2021-06-05 21:52:35,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:35,708 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 177 transitions. [2021-06-05 21:52:35,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:35,708 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:35,709 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:35,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1017,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:35,909 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:35,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:35,909 INFO L82 PathProgramCache]: Analyzing trace with hash 2086701778, now seen corresponding path program 166 times [2021-06-05 21:52:35,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:35,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887613442] [2021-06-05 21:52:35,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:35,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:35,968 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:35,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:35,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887613442] [2021-06-05 21:52:35,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887613442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:35,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50837530] [2021-06-05 21:52:35,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:35,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:52:35,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:35,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:35,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:36,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:36,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:36,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:52:36,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:36,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:36,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:52:36,086 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:36,101 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-06-05 21:52:36,101 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:52:36,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:52:36,102 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-06-05 21:52:36,121 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:36,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50837530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:36,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:36,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:52:36,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700454919] [2021-06-05 21:52:36,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:52:36,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:36,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:52:36,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:36,122 INFO L87 Difference]: Start difference. First operand 83 states and 177 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:36,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:36,267 INFO L93 Difference]: Finished difference Result 114 states and 239 transitions. [2021-06-05 21:52:36,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:52:36,267 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:36,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:36,268 INFO L225 Difference]: With dead ends: 114 [2021-06-05 21:52:36,268 INFO L226 Difference]: Without dead ends: 114 [2021-06-05 21:52:36,268 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 165.2ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:52:36,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-06-05 21:52:36,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 83. [2021-06-05 21:52:36,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.158536585365854) internal successors, (177), 82 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:36,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 177 transitions. [2021-06-05 21:52:36,269 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 177 transitions. Word has length 17 [2021-06-05 21:52:36,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:36,269 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 177 transitions. [2021-06-05 21:52:36,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:36,269 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 177 transitions. [2021-06-05 21:52:36,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:36,269 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:36,269 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:36,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1021,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:36,485 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:36,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:36,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1300647758, now seen corresponding path program 167 times [2021-06-05 21:52:36,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:36,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70089470] [2021-06-05 21:52:36,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:36,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:36,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:36,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:36,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70089470] [2021-06-05 21:52:36,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70089470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:36,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799641598] [2021-06-05 21:52:36,555 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:36,579 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:52:36,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:36,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:36,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:36,672 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:36,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799641598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:36,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:36,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 21:52:36,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227609972] [2021-06-05 21:52:36,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:52:36,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:36,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:52:36,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:52:36,673 INFO L87 Difference]: Start difference. First operand 83 states and 177 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:36,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:36,953 INFO L93 Difference]: Finished difference Result 118 states and 238 transitions. [2021-06-05 21:52:36,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:52:36,953 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:36,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:36,953 INFO L225 Difference]: With dead ends: 118 [2021-06-05 21:52:36,953 INFO L226 Difference]: Without dead ends: 115 [2021-06-05 21:52:36,954 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 257.1ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:52:36,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-06-05 21:52:36,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 88. [2021-06-05 21:52:36,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.1724137931034484) internal successors, (189), 87 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:36,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 189 transitions. [2021-06-05 21:52:36,955 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 189 transitions. Word has length 17 [2021-06-05 21:52:36,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:36,955 INFO L482 AbstractCegarLoop]: Abstraction has 88 states and 189 transitions. [2021-06-05 21:52:36,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:36,955 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 189 transitions. [2021-06-05 21:52:36,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:36,955 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:36,955 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:37,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1025,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:37,169 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:37,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:37,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1076716290, now seen corresponding path program 168 times [2021-06-05 21:52:37,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:37,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262691607] [2021-06-05 21:52:37,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:37,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:37,230 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:37,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:37,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262691607] [2021-06-05 21:52:37,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262691607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:37,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408178126] [2021-06-05 21:52:37,231 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:37,255 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:52:37,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:37,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:37,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:37,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:37,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:37,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:52:37,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:37,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:37,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:37,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:52:37,347 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:37,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:37,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:37,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:52:37,351 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:37,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:37,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:52:37,355 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:37,387 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 21:52:37,387 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:52:37,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:52:37,388 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 21:52:37,422 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:37,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408178126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:37,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:37,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:52:37,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776286636] [2021-06-05 21:52:37,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:52:37,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:37,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:52:37,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:37,423 INFO L87 Difference]: Start difference. First operand 88 states and 189 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:37,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:37,740 INFO L93 Difference]: Finished difference Result 139 states and 283 transitions. [2021-06-05 21:52:37,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:52:37,740 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:37,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:37,741 INFO L225 Difference]: With dead ends: 139 [2021-06-05 21:52:37,741 INFO L226 Difference]: Without dead ends: 139 [2021-06-05 21:52:37,741 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 277.7ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:52:37,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-06-05 21:52:37,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 88. [2021-06-05 21:52:37,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.1724137931034484) internal successors, (189), 87 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:37,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 189 transitions. [2021-06-05 21:52:37,742 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 189 transitions. Word has length 17 [2021-06-05 21:52:37,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:37,742 INFO L482 AbstractCegarLoop]: Abstraction has 88 states and 189 transitions. [2021-06-05 21:52:37,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:37,742 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 189 transitions. [2021-06-05 21:52:37,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:37,742 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:37,742 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:37,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1035 [2021-06-05 21:52:37,943 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:37,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:37,943 INFO L82 PathProgramCache]: Analyzing trace with hash -334074542, now seen corresponding path program 169 times [2021-06-05 21:52:37,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:37,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162450945] [2021-06-05 21:52:37,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:37,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:38,005 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:38,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:38,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162450945] [2021-06-05 21:52:38,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162450945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:38,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842584034] [2021-06-05 21:52:38,005 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:38,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:38,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:38,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:38,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:38,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:38,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:52:38,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:38,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:38,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:38,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:52:38,111 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:38,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:38,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:38,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:52:38,114 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:38,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:38,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:52:38,117 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:38,149 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 21:52:38,149 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:52:38,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:52:38,150 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 21:52:38,174 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:38,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842584034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:38,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:38,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 21:52:38,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361005101] [2021-06-05 21:52:38,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:52:38,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:38,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:52:38,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:52:38,175 INFO L87 Difference]: Start difference. First operand 88 states and 189 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:38,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:38,381 INFO L93 Difference]: Finished difference Result 115 states and 240 transitions. [2021-06-05 21:52:38,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:52:38,381 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:38,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:38,381 INFO L225 Difference]: With dead ends: 115 [2021-06-05 21:52:38,381 INFO L226 Difference]: Without dead ends: 113 [2021-06-05 21:52:38,381 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 207.2ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:52:38,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-06-05 21:52:38,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 88. [2021-06-05 21:52:38,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.160919540229885) internal successors, (188), 87 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:38,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 188 transitions. [2021-06-05 21:52:38,382 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 188 transitions. Word has length 17 [2021-06-05 21:52:38,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:38,383 INFO L482 AbstractCegarLoop]: Abstraction has 88 states and 188 transitions. [2021-06-05 21:52:38,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:38,383 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 188 transitions. [2021-06-05 21:52:38,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:38,383 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:38,383 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:38,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1047 [2021-06-05 21:52:38,583 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:38,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:38,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1858134266, now seen corresponding path program 170 times [2021-06-05 21:52:38,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:38,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862392943] [2021-06-05 21:52:38,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:38,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:38,666 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:38,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:38,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862392943] [2021-06-05 21:52:38,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862392943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:38,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931793568] [2021-06-05 21:52:38,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:38,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:52:38,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:38,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:52:38,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:38,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:38,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:38,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:52:38,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:38,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:38,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:38,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:52:38,775 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:38,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:38,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:38,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:52:38,778 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:38,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:38,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:52:38,781 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:38,822 INFO L628 ElimStorePlain]: treesize reduction 65, result has 38.1 percent of original size [2021-06-05 21:52:38,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:38,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 21:52:38,826 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:52:38,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:52:38,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:52:38,843 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:133, output treesize:22 [2021-06-05 21:52:38,879 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:38,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931793568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:38,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:38,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:52:38,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351501996] [2021-06-05 21:52:38,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:52:38,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:38,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:52:38,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:38,880 INFO L87 Difference]: Start difference. First operand 88 states and 188 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:39,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:39,009 INFO L93 Difference]: Finished difference Result 101 states and 213 transitions. [2021-06-05 21:52:39,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:52:39,009 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:39,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:39,009 INFO L225 Difference]: With dead ends: 101 [2021-06-05 21:52:39,009 INFO L226 Difference]: Without dead ends: 101 [2021-06-05 21:52:39,009 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 186.3ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:52:39,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-06-05 21:52:39,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 82. [2021-06-05 21:52:39,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.1604938271604937) internal successors, (175), 81 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:39,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 175 transitions. [2021-06-05 21:52:39,010 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 175 transitions. Word has length 17 [2021-06-05 21:52:39,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:39,010 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 175 transitions. [2021-06-05 21:52:39,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:39,010 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 175 transitions. [2021-06-05 21:52:39,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:39,011 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:39,011 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:39,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1058 [2021-06-05 21:52:39,217 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:39,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:39,217 INFO L82 PathProgramCache]: Analyzing trace with hash -806136362, now seen corresponding path program 171 times [2021-06-05 21:52:39,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:39,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898371432] [2021-06-05 21:52:39,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:39,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:39,280 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:39,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:39,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898371432] [2021-06-05 21:52:39,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898371432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:39,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618657470] [2021-06-05 21:52:39,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:39,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:52:39,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:39,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:39,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:39,426 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:39,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618657470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:39,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:39,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 21:52:39,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189829806] [2021-06-05 21:52:39,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:52:39,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:39,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:52:39,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:52:39,427 INFO L87 Difference]: Start difference. First operand 82 states and 175 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:39,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:39,638 INFO L93 Difference]: Finished difference Result 126 states and 251 transitions. [2021-06-05 21:52:39,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:52:39,639 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:39,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:39,639 INFO L225 Difference]: With dead ends: 126 [2021-06-05 21:52:39,639 INFO L226 Difference]: Without dead ends: 123 [2021-06-05 21:52:39,639 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 224.9ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:52:39,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-06-05 21:52:39,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2021-06-05 21:52:39,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.1627906976744184) internal successors, (186), 86 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:39,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 186 transitions. [2021-06-05 21:52:39,640 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 186 transitions. Word has length 17 [2021-06-05 21:52:39,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:39,640 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 186 transitions. [2021-06-05 21:52:39,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:39,640 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 186 transitions. [2021-06-05 21:52:39,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:39,640 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:39,640 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:39,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1062,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:39,841 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:39,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:39,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1030067830, now seen corresponding path program 172 times [2021-06-05 21:52:39,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:39,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573777188] [2021-06-05 21:52:39,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:39,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:39,912 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:39,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:39,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573777188] [2021-06-05 21:52:39,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573777188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:39,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322315046] [2021-06-05 21:52:39,913 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:39,936 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:52:39,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:39,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:39,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:40,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:40,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:40,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:52:40,030 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:40,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:40,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:52:40,033 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:40,069 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-06-05 21:52:40,069 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:52:40,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 21:52:40,072 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:40,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:52:40,087 INFO L518 ElimStorePlain]: Eliminatee v_prenex_131 vanished before elimination [2021-06-05 21:52:40,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:52:40,088 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 21:52:40,125 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:40,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322315046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:40,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:40,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:52:40,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272296672] [2021-06-05 21:52:40,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:52:40,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:40,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:52:40,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:40,126 INFO L87 Difference]: Start difference. First operand 87 states and 186 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:40,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:40,389 INFO L93 Difference]: Finished difference Result 120 states and 243 transitions. [2021-06-05 21:52:40,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:52:40,389 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:40,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:40,390 INFO L225 Difference]: With dead ends: 120 [2021-06-05 21:52:40,390 INFO L226 Difference]: Without dead ends: 120 [2021-06-05 21:52:40,390 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 282.9ms TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:52:40,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-06-05 21:52:40,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 87. [2021-06-05 21:52:40,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.1627906976744184) internal successors, (186), 86 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:40,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 186 transitions. [2021-06-05 21:52:40,391 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 186 transitions. Word has length 17 [2021-06-05 21:52:40,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:40,391 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 186 transitions. [2021-06-05 21:52:40,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:40,391 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 186 transitions. [2021-06-05 21:52:40,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:40,391 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:40,391 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:40,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1073,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:40,592 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:40,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:40,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1854108634, now seen corresponding path program 173 times [2021-06-05 21:52:40,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:40,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319843867] [2021-06-05 21:52:40,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:40,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:40,654 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:40,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:40,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319843867] [2021-06-05 21:52:40,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319843867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:40,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754239916] [2021-06-05 21:52:40,655 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:40,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:52:40,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:40,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:40,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:40,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:40,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:40,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:52:40,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:40,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:40,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:52:40,765 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:40,802 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-06-05 21:52:40,802 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:52:40,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 21:52:40,805 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:40,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:52:40,817 INFO L518 ElimStorePlain]: Eliminatee v_prenex_134 vanished before elimination [2021-06-05 21:52:40,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:52:40,818 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 21:52:40,843 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:40,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754239916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:40,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:40,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 21:52:40,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238516919] [2021-06-05 21:52:40,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:52:40,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:40,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:52:40,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:52:40,844 INFO L87 Difference]: Start difference. First operand 87 states and 186 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:41,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:41,143 INFO L93 Difference]: Finished difference Result 118 states and 236 transitions. [2021-06-05 21:52:41,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:52:41,144 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:41,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:41,144 INFO L225 Difference]: With dead ends: 118 [2021-06-05 21:52:41,144 INFO L226 Difference]: Without dead ends: 116 [2021-06-05 21:52:41,144 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 293.8ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:52:41,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-06-05 21:52:41,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 87. [2021-06-05 21:52:41,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.1511627906976742) internal successors, (185), 86 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:41,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 185 transitions. [2021-06-05 21:52:41,145 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 185 transitions. Word has length 17 [2021-06-05 21:52:41,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:41,145 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 185 transitions. [2021-06-05 21:52:41,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:41,145 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 185 transitions. [2021-06-05 21:52:41,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:41,146 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:41,146 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:41,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1080,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:41,365 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:41,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:41,365 INFO L82 PathProgramCache]: Analyzing trace with hash 330048910, now seen corresponding path program 174 times [2021-06-05 21:52:41,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:41,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062391030] [2021-06-05 21:52:41,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:41,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:41,427 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:41,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:41,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062391030] [2021-06-05 21:52:41,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062391030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:41,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195220821] [2021-06-05 21:52:41,428 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:41,452 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:52:41,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:41,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:41,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:41,580 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:41,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195220821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:41,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:41,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 21:52:41,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28953454] [2021-06-05 21:52:41,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:52:41,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:41,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:52:41,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:52:41,581 INFO L87 Difference]: Start difference. First operand 87 states and 185 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:41,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:41,791 INFO L93 Difference]: Finished difference Result 132 states and 265 transitions. [2021-06-05 21:52:41,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:52:41,792 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:41,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:41,792 INFO L225 Difference]: With dead ends: 132 [2021-06-05 21:52:41,792 INFO L226 Difference]: Without dead ends: 132 [2021-06-05 21:52:41,792 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 217.8ms TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:52:41,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-06-05 21:52:41,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 86. [2021-06-05 21:52:41,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.152941176470588) internal successors, (183), 85 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:41,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 183 transitions. [2021-06-05 21:52:41,793 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 183 transitions. Word has length 17 [2021-06-05 21:52:41,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:41,793 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 183 transitions. [2021-06-05 21:52:41,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:41,793 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 183 transitions. [2021-06-05 21:52:41,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:41,793 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:41,793 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:41,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1088 [2021-06-05 21:52:41,994 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:41,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:41,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1903003084, now seen corresponding path program 175 times [2021-06-05 21:52:41,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:41,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519213122] [2021-06-05 21:52:41,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:41,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:42,070 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:42,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:42,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519213122] [2021-06-05 21:52:42,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519213122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:42,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174290830] [2021-06-05 21:52:42,071 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:42,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:42,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:42,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:42,187 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:42,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174290830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:42,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:42,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 21:52:42,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808983782] [2021-06-05 21:52:42,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:52:42,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:42,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:52:42,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:52:42,188 INFO L87 Difference]: Start difference. First operand 86 states and 183 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:42,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:42,423 INFO L93 Difference]: Finished difference Result 94 states and 195 transitions. [2021-06-05 21:52:42,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:52:42,423 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:42,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:42,423 INFO L225 Difference]: With dead ends: 94 [2021-06-05 21:52:42,423 INFO L226 Difference]: Without dead ends: 90 [2021-06-05 21:52:42,423 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 254.4ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:52:42,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-05 21:52:42,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2021-06-05 21:52:42,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.1411764705882352) internal successors, (182), 85 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:42,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 182 transitions. [2021-06-05 21:52:42,424 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 182 transitions. Word has length 17 [2021-06-05 21:52:42,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:42,424 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 182 transitions. [2021-06-05 21:52:42,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:42,425 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 182 transitions. [2021-06-05 21:52:42,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:42,425 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:42,425 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:42,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1098,176 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:42,625 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:42,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:42,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1816121850, now seen corresponding path program 176 times [2021-06-05 21:52:42,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:42,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031726645] [2021-06-05 21:52:42,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:42,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:42,687 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:42,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:42,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031726645] [2021-06-05 21:52:42,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031726645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:42,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542337980] [2021-06-05 21:52:42,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:42,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:52:42,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:42,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:52:42,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:42,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:42,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:42,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:52:42,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:42,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:42,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:52:42,796 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:42,814 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 21:52:42,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:42,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 21:52:42,817 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:52:42,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:52:42,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:52:42,824 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 21:52:42,843 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:42,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542337980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:42,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:42,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:52:42,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662983143] [2021-06-05 21:52:42,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:52:42,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:42,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:52:42,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:42,844 INFO L87 Difference]: Start difference. First operand 86 states and 182 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:42,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:42,994 INFO L93 Difference]: Finished difference Result 105 states and 218 transitions. [2021-06-05 21:52:42,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:52:42,995 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:42,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:42,995 INFO L225 Difference]: With dead ends: 105 [2021-06-05 21:52:42,995 INFO L226 Difference]: Without dead ends: 105 [2021-06-05 21:52:42,995 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 152.1ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:52:42,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-06-05 21:52:42,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 79. [2021-06-05 21:52:42,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.128205128205128) internal successors, (166), 78 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:42,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 166 transitions. [2021-06-05 21:52:42,996 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 166 transitions. Word has length 17 [2021-06-05 21:52:42,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:42,998 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 166 transitions. [2021-06-05 21:52:42,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:42,998 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 166 transitions. [2021-06-05 21:52:42,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:42,998 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:42,998 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:43,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1103 [2021-06-05 21:52:43,198 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:43,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:43,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1691934642, now seen corresponding path program 177 times [2021-06-05 21:52:43,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:43,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379516982] [2021-06-05 21:52:43,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:43,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:43,252 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:43,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:43,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379516982] [2021-06-05 21:52:43,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379516982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:43,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263175097] [2021-06-05 21:52:43,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:43,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:52:43,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:43,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:52:43,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:43,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:43,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:43,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:52:43,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:43,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:43,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:52:43,374 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:43,419 INFO L628 ElimStorePlain]: treesize reduction 72, result has 39.5 percent of original size [2021-06-05 21:52:43,419 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:52:43,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:43,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:52:43,423 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:43,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:52:43,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:43,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 21:52:43,442 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:52:43,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:52:43,458 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:52:43,458 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-06-05 21:52:43,488 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:43,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263175097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:43,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:43,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 21:52:43,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608039627] [2021-06-05 21:52:43,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:52:43,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:43,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:52:43,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:52:43,489 INFO L87 Difference]: Start difference. First operand 79 states and 166 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:43,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:43,601 INFO L93 Difference]: Finished difference Result 109 states and 213 transitions. [2021-06-05 21:52:43,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:52:43,601 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:43,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:43,602 INFO L225 Difference]: With dead ends: 109 [2021-06-05 21:52:43,602 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 21:52:43,602 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 130.1ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:43,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 21:52:43,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 85. [2021-06-05 21:52:43,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.142857142857143) internal successors, (180), 84 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:43,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 180 transitions. [2021-06-05 21:52:43,603 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 180 transitions. Word has length 17 [2021-06-05 21:52:43,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:43,603 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 180 transitions. [2021-06-05 21:52:43,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:43,603 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 180 transitions. [2021-06-05 21:52:43,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:43,603 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:43,603 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:43,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1105 [2021-06-05 21:52:43,803 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:43,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:43,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1265797140, now seen corresponding path program 178 times [2021-06-05 21:52:43,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:43,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165414220] [2021-06-05 21:52:43,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:43,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:43,879 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:43,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:43,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165414220] [2021-06-05 21:52:43,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165414220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:43,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267021528] [2021-06-05 21:52:43,879 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:43,902 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:52:43,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:43,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:43,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:44,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:44,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:44,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:52:44,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:44,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:44,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:52:44,009 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:44,046 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-06-05 21:52:44,046 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:52:44,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 21:52:44,049 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:44,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:52:44,062 INFO L518 ElimStorePlain]: Eliminatee v_prenex_141 vanished before elimination [2021-06-05 21:52:44,062 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:52:44,062 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 21:52:44,099 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:44,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267021528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:44,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:44,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:52:44,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556237759] [2021-06-05 21:52:44,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:52:44,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:44,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:52:44,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:44,100 INFO L87 Difference]: Start difference. First operand 85 states and 180 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:44,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:44,356 INFO L93 Difference]: Finished difference Result 109 states and 214 transitions. [2021-06-05 21:52:44,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:52:44,356 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:44,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:44,357 INFO L225 Difference]: With dead ends: 109 [2021-06-05 21:52:44,357 INFO L226 Difference]: Without dead ends: 109 [2021-06-05 21:52:44,357 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 285.4ms TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:52:44,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-06-05 21:52:44,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 82. [2021-06-05 21:52:44,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.074074074074074) internal successors, (168), 81 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:44,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 168 transitions. [2021-06-05 21:52:44,358 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 168 transitions. Word has length 17 [2021-06-05 21:52:44,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:44,358 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 168 transitions. [2021-06-05 21:52:44,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:44,358 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 168 transitions. [2021-06-05 21:52:44,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:44,358 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:44,358 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:44,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1110 [2021-06-05 21:52:44,559 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:44,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:44,559 INFO L82 PathProgramCache]: Analyzing trace with hash -555749370, now seen corresponding path program 179 times [2021-06-05 21:52:44,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:44,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027660950] [2021-06-05 21:52:44,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:44,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:44,614 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:44,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:44,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027660950] [2021-06-05 21:52:44,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027660950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:44,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815180789] [2021-06-05 21:52:44,614 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:44,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:52:44,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:44,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:44,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:44,772 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:44,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815180789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:44,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:44,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 21:52:44,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426383267] [2021-06-05 21:52:44,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:52:44,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:44,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:52:44,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:52:44,773 INFO L87 Difference]: Start difference. First operand 82 states and 168 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:44,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:44,897 INFO L93 Difference]: Finished difference Result 106 states and 204 transitions. [2021-06-05 21:52:44,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:52:44,898 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:44,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:44,898 INFO L225 Difference]: With dead ends: 106 [2021-06-05 21:52:44,898 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 21:52:44,898 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 149.7ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:44,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 21:52:44,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 81. [2021-06-05 21:52:44,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.075) internal successors, (166), 80 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:44,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 166 transitions. [2021-06-05 21:52:44,899 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 166 transitions. Word has length 17 [2021-06-05 21:52:44,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:44,899 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 166 transitions. [2021-06-05 21:52:44,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:44,899 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 166 transitions. [2021-06-05 21:52:44,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:44,899 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:44,899 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:45,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1117,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:45,100 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:45,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:45,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1506165932, now seen corresponding path program 180 times [2021-06-05 21:52:45,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:45,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393459460] [2021-06-05 21:52:45,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:45,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:45,164 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:45,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:45,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393459460] [2021-06-05 21:52:45,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393459460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:45,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892653268] [2021-06-05 21:52:45,165 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:45,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 21:52:45,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:45,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:52:45,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:45,311 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:45,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892653268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:45,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:45,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 21:52:45,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877049184] [2021-06-05 21:52:45,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:52:45,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:45,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:52:45,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:52:45,312 INFO L87 Difference]: Start difference. First operand 81 states and 166 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:45,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:45,442 INFO L93 Difference]: Finished difference Result 89 states and 176 transitions. [2021-06-05 21:52:45,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:52:45,442 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:45,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:45,443 INFO L225 Difference]: With dead ends: 89 [2021-06-05 21:52:45,443 INFO L226 Difference]: Without dead ends: 85 [2021-06-05 21:52:45,443 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 158.9ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:45,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-06-05 21:52:45,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2021-06-05 21:52:45,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.0625) internal successors, (165), 80 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:45,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 165 transitions. [2021-06-05 21:52:45,444 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 165 transitions. Word has length 17 [2021-06-05 21:52:45,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:45,444 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 165 transitions. [2021-06-05 21:52:45,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:45,444 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 165 transitions. [2021-06-05 21:52:45,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:45,444 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:45,444 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:45,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1129,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:45,645 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:45,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:45,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1593047166, now seen corresponding path program 181 times [2021-06-05 21:52:45,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:45,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518625583] [2021-06-05 21:52:45,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:45,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:45,707 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:45,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:45,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518625583] [2021-06-05 21:52:45,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518625583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:45,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056545363] [2021-06-05 21:52:45,707 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:45,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:45,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:45,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:45,835 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:45,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056545363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:45,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:45,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 21:52:45,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420486094] [2021-06-05 21:52:45,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:52:45,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:45,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:52:45,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:52:45,836 INFO L87 Difference]: Start difference. First operand 81 states and 165 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:45,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:45,930 INFO L93 Difference]: Finished difference Result 101 states and 201 transitions. [2021-06-05 21:52:45,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:52:45,931 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:45,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:45,931 INFO L225 Difference]: With dead ends: 101 [2021-06-05 21:52:45,931 INFO L226 Difference]: Without dead ends: 101 [2021-06-05 21:52:45,931 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 111.7ms TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:52:45,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-06-05 21:52:45,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 80. [2021-06-05 21:52:45,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.0632911392405062) internal successors, (163), 79 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:45,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 163 transitions. [2021-06-05 21:52:45,932 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 163 transitions. Word has length 17 [2021-06-05 21:52:45,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:45,932 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 163 transitions. [2021-06-05 21:52:45,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:45,932 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 163 transitions. [2021-06-05 21:52:45,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:45,932 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:45,932 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:46,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1134,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:46,134 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:46,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:46,134 INFO L82 PathProgramCache]: Analyzing trace with hash 999819666, now seen corresponding path program 182 times [2021-06-05 21:52:46,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:46,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097179242] [2021-06-05 21:52:46,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:46,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:46,197 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:46,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:46,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097179242] [2021-06-05 21:52:46,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097179242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:46,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172713568] [2021-06-05 21:52:46,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 21:52:46,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:52:46,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:46,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:52:46,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:46,331 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:46,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172713568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:46,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:46,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 21:52:46,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720483353] [2021-06-05 21:52:46,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:52:46,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:46,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:52:46,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:52:46,332 INFO L87 Difference]: Start difference. First operand 80 states and 163 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:46,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:46,442 INFO L93 Difference]: Finished difference Result 86 states and 170 transitions. [2021-06-05 21:52:46,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:52:46,443 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:46,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:46,443 INFO L225 Difference]: With dead ends: 86 [2021-06-05 21:52:46,443 INFO L226 Difference]: Without dead ends: 80 [2021-06-05 21:52:46,443 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 148.9ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:46,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-05 21:52:46,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-06-05 21:52:46,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.050632911392405) internal successors, (162), 79 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:46,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 162 transitions. [2021-06-05 21:52:46,444 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 162 transitions. Word has length 17 [2021-06-05 21:52:46,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:46,444 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 162 transitions. [2021-06-05 21:52:46,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:46,444 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 162 transitions. [2021-06-05 21:52:46,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:46,444 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:46,444 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:46,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1138 [2021-06-05 21:52:46,653 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:46,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:46,653 INFO L82 PathProgramCache]: Analyzing trace with hash -513736954, now seen corresponding path program 183 times [2021-06-05 21:52:46,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:46,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790327493] [2021-06-05 21:52:46,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:46,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:46,706 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:46,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:46,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790327493] [2021-06-05 21:52:46,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790327493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:46,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789273956] [2021-06-05 21:52:46,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:46,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:52:46,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:46,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:52:46,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:46,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:46,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:46,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:52:46,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:46,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:46,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:52:46,818 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:46,836 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 21:52:46,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:46,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 21:52:46,839 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:52:46,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:52:46,845 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:52:46,845 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 21:52:46,862 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:46,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789273956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:46,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:46,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:52:46,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617350589] [2021-06-05 21:52:46,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:52:46,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:46,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:52:46,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:46,863 INFO L87 Difference]: Start difference. First operand 80 states and 162 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:46,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:46,964 INFO L93 Difference]: Finished difference Result 89 states and 177 transitions. [2021-06-05 21:52:46,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:52:46,964 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:46,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:46,964 INFO L225 Difference]: With dead ends: 89 [2021-06-05 21:52:46,964 INFO L226 Difference]: Without dead ends: 89 [2021-06-05 21:52:46,965 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 109.6ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:46,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-05 21:52:46,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 72. [2021-06-05 21:52:46,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 71 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:46,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 143 transitions. [2021-06-05 21:52:46,965 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 143 transitions. Word has length 17 [2021-06-05 21:52:46,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:46,965 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 143 transitions. [2021-06-05 21:52:46,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:46,966 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 143 transitions. [2021-06-05 21:52:46,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:46,966 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:46,966 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:47,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1142,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:47,167 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:47,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:47,167 INFO L82 PathProgramCache]: Analyzing trace with hash 68118298, now seen corresponding path program 184 times [2021-06-05 21:52:47,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:47,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350451886] [2021-06-05 21:52:47,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:47,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:47,225 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:47,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:47,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350451886] [2021-06-05 21:52:47,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350451886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:47,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588553418] [2021-06-05 21:52:47,225 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:47,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:52:47,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:47,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:47,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:47,392 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:47,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588553418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:47,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:47,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 21:52:47,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585737349] [2021-06-05 21:52:47,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:52:47,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:47,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:52:47,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:52:47,393 INFO L87 Difference]: Start difference. First operand 72 states and 143 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:47,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:47,579 INFO L93 Difference]: Finished difference Result 117 states and 217 transitions. [2021-06-05 21:52:47,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:52:47,579 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:47,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:47,579 INFO L225 Difference]: With dead ends: 117 [2021-06-05 21:52:47,579 INFO L226 Difference]: Without dead ends: 114 [2021-06-05 21:52:47,580 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 219.1ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:52:47,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-06-05 21:52:47,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 78. [2021-06-05 21:52:47,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.038961038961039) internal successors, (157), 77 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:47,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 157 transitions. [2021-06-05 21:52:47,580 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 157 transitions. Word has length 17 [2021-06-05 21:52:47,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:47,581 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 157 transitions. [2021-06-05 21:52:47,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:47,581 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 157 transitions. [2021-06-05 21:52:47,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:47,581 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:47,581 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:47,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1144 [2021-06-05 21:52:47,781 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:47,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:47,781 INFO L82 PathProgramCache]: Analyzing trace with hash -155813170, now seen corresponding path program 185 times [2021-06-05 21:52:47,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:47,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525592184] [2021-06-05 21:52:47,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:47,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:47,870 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:47,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:47,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525592184] [2021-06-05 21:52:47,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525592184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:47,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797745914] [2021-06-05 21:52:47,871 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:47,895 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:52:47,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:47,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:47,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:48,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:48,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:48,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:52:48,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:48,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:48,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:52:48,022 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:48,059 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-06-05 21:52:48,059 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:52:48,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 21:52:48,062 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:48,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:52:48,075 INFO L518 ElimStorePlain]: Eliminatee v_prenex_148 vanished before elimination [2021-06-05 21:52:48,076 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:52:48,076 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 21:52:48,102 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:48,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797745914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:48,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:48,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 21:52:48,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102179390] [2021-06-05 21:52:48,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:52:48,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:48,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:52:48,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:52:48,102 INFO L87 Difference]: Start difference. First operand 78 states and 157 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:48,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:48,489 INFO L93 Difference]: Finished difference Result 99 states and 189 transitions. [2021-06-05 21:52:48,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:52:48,490 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:48,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:48,490 INFO L225 Difference]: With dead ends: 99 [2021-06-05 21:52:48,490 INFO L226 Difference]: Without dead ends: 99 [2021-06-05 21:52:48,490 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 420.6ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:52:48,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-06-05 21:52:48,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 78. [2021-06-05 21:52:48,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.038961038961039) internal successors, (157), 77 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:48,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 157 transitions. [2021-06-05 21:52:48,491 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 157 transitions. Word has length 17 [2021-06-05 21:52:48,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:48,491 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 157 transitions. [2021-06-05 21:52:48,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:48,491 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 157 transitions. [2021-06-05 21:52:48,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:48,492 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:48,492 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:48,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1155 [2021-06-05 21:52:48,705 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:48,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:48,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1204303570, now seen corresponding path program 186 times [2021-06-05 21:52:48,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:48,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949246311] [2021-06-05 21:52:48,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:48,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:48,761 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:48,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:48,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949246311] [2021-06-05 21:52:48,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949246311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:48,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481648496] [2021-06-05 21:52:48,761 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:48,786 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:52:48,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:48,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:52:48,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:48,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:48,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:48,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:52:48,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:48,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:48,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:52:48,896 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:48,942 INFO L628 ElimStorePlain]: treesize reduction 70, result has 41.2 percent of original size [2021-06-05 21:52:48,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:48,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 21:52:48,946 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:52:48,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:52:48,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 21:52:48,966 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:48,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:52:48,983 INFO L518 ElimStorePlain]: Eliminatee v_prenex_151 vanished before elimination [2021-06-05 21:52:48,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:52:48,984 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-06-05 21:52:49,022 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:49,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481648496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:49,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:49,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:52:49,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893662385] [2021-06-05 21:52:49,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:52:49,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:49,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:52:49,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:49,023 INFO L87 Difference]: Start difference. First operand 78 states and 157 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:49,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:49,262 INFO L93 Difference]: Finished difference Result 116 states and 214 transitions. [2021-06-05 21:52:49,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:52:49,263 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:49,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:49,263 INFO L225 Difference]: With dead ends: 116 [2021-06-05 21:52:49,263 INFO L226 Difference]: Without dead ends: 116 [2021-06-05 21:52:49,263 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 275.8ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:52:49,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-06-05 21:52:49,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 77. [2021-06-05 21:52:49,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.039473684210526) internal successors, (155), 76 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:49,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 155 transitions. [2021-06-05 21:52:49,264 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 155 transitions. Word has length 17 [2021-06-05 21:52:49,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:49,264 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 155 transitions. [2021-06-05 21:52:49,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:49,265 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 155 transitions. [2021-06-05 21:52:49,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:49,265 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:49,265 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:49,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1162,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:49,469 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:49,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:49,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1028748424, now seen corresponding path program 187 times [2021-06-05 21:52:49,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:49,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245905392] [2021-06-05 21:52:49,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:49,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:49,557 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:49,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:49,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245905392] [2021-06-05 21:52:49,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245905392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:49,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452248242] [2021-06-05 21:52:49,557 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:49,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:49,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:49,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:49,721 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:49,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452248242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:49,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:49,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 21:52:49,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611385520] [2021-06-05 21:52:49,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:52:49,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:49,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:52:49,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:52:49,722 INFO L87 Difference]: Start difference. First operand 77 states and 155 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:50,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:50,133 INFO L93 Difference]: Finished difference Result 98 states and 183 transitions. [2021-06-05 21:52:50,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:52:50,134 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:50,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:50,134 INFO L225 Difference]: With dead ends: 98 [2021-06-05 21:52:50,134 INFO L226 Difference]: Without dead ends: 94 [2021-06-05 21:52:50,134 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 438.1ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:52:50,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-05 21:52:50,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 77. [2021-06-05 21:52:50,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.026315789473684) internal successors, (154), 76 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:50,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 154 transitions. [2021-06-05 21:52:50,135 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 154 transitions. Word has length 17 [2021-06-05 21:52:50,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:50,135 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 154 transitions. [2021-06-05 21:52:50,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:50,135 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 154 transitions. [2021-06-05 21:52:50,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:50,135 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:50,135 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:50,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1166 [2021-06-05 21:52:50,336 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:50,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:50,336 INFO L82 PathProgramCache]: Analyzing trace with hash -941867190, now seen corresponding path program 188 times [2021-06-05 21:52:50,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:50,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998507980] [2021-06-05 21:52:50,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:50,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:50,394 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:50,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:50,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998507980] [2021-06-05 21:52:50,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998507980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:50,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552371724] [2021-06-05 21:52:50,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:50,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:52:50,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:50,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:52:50,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:50,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:50,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:50,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:52:50,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:50,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:50,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:52:50,541 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:50,559 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 21:52:50,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:50,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 21:52:50,564 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:52:50,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:52:50,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:52:50,570 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 21:52:50,587 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:50,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552371724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:50,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:50,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 21:52:50,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972069992] [2021-06-05 21:52:50,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:52:50,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:50,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:52:50,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:52:50,588 INFO L87 Difference]: Start difference. First operand 77 states and 154 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:50,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:50,738 INFO L93 Difference]: Finished difference Result 110 states and 208 transitions. [2021-06-05 21:52:50,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:52:50,738 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:50,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:50,739 INFO L225 Difference]: With dead ends: 110 [2021-06-05 21:52:50,739 INFO L226 Difference]: Without dead ends: 110 [2021-06-05 21:52:50,739 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 195.6ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:52:50,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-06-05 21:52:50,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 76. [2021-06-05 21:52:50,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.026666666666667) internal successors, (152), 75 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:50,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 152 transitions. [2021-06-05 21:52:50,740 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 152 transitions. Word has length 17 [2021-06-05 21:52:50,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:50,740 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 152 transitions. [2021-06-05 21:52:50,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:50,740 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 152 transitions. [2021-06-05 21:52:50,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:50,740 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:50,740 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:50,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1172,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:50,940 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:50,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:50,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1535094690, now seen corresponding path program 189 times [2021-06-05 21:52:50,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:50,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956276515] [2021-06-05 21:52:50,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:50,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:51,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:51,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:51,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956276515] [2021-06-05 21:52:51,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956276515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:51,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703098041] [2021-06-05 21:52:51,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:51,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:52:51,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:51,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:51,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:51,170 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:51,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703098041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:51,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:51,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 21:52:51,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340354962] [2021-06-05 21:52:51,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:52:51,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:51,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:52:51,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:52:51,170 INFO L87 Difference]: Start difference. First operand 76 states and 152 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:51,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:51,567 INFO L93 Difference]: Finished difference Result 99 states and 183 transitions. [2021-06-05 21:52:51,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:52:51,568 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:51,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:51,568 INFO L225 Difference]: With dead ends: 99 [2021-06-05 21:52:51,568 INFO L226 Difference]: Without dead ends: 93 [2021-06-05 21:52:51,568 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 420.2ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:52:51,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-06-05 21:52:51,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 76. [2021-06-05 21:52:51,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.013333333333333) internal successors, (151), 75 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:51,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 151 transitions. [2021-06-05 21:52:51,569 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 151 transitions. Word has length 17 [2021-06-05 21:52:51,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:51,569 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 151 transitions. [2021-06-05 21:52:51,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:51,569 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 151 transitions. [2021-06-05 21:52:51,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:51,569 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:51,569 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:51,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1174 [2021-06-05 21:52:51,780 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:51,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:51,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1246315986, now seen corresponding path program 190 times [2021-06-05 21:52:51,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:51,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775020574] [2021-06-05 21:52:51,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:51,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:51,839 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:51,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:51,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775020574] [2021-06-05 21:52:51,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775020574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:51,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691079529] [2021-06-05 21:52:51,839 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:51,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:52:51,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:51,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:51,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:51,968 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:51,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691079529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:51,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:51,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 21:52:51,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72204593] [2021-06-05 21:52:51,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:52:51,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:51,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:52:51,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:52:51,969 INFO L87 Difference]: Start difference. First operand 76 states and 151 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:52,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:52,148 INFO L93 Difference]: Finished difference Result 119 states and 226 transitions. [2021-06-05 21:52:52,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:52:52,148 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:52,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:52,148 INFO L225 Difference]: With dead ends: 119 [2021-06-05 21:52:52,148 INFO L226 Difference]: Without dead ends: 119 [2021-06-05 21:52:52,149 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 174.9ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:52:52,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-05 21:52:52,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 75. [2021-06-05 21:52:52,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 74 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:52,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 149 transitions. [2021-06-05 21:52:52,149 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 149 transitions. Word has length 17 [2021-06-05 21:52:52,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:52,150 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 149 transitions. [2021-06-05 21:52:52,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:52,150 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 149 transitions. [2021-06-05 21:52:52,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:52,150 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:52,150 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:52,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1179 [2021-06-05 21:52:52,350 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:52,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:52,351 INFO L82 PathProgramCache]: Analyzing trace with hash -494858892, now seen corresponding path program 191 times [2021-06-05 21:52:52,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:52,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673338437] [2021-06-05 21:52:52,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:52,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:52,419 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:52,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:52,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673338437] [2021-06-05 21:52:52,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673338437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:52,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756231476] [2021-06-05 21:52:52,419 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:52,443 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:52:52,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:52,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:52,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:52,518 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:52,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756231476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:52,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:52,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 21:52:52,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342127265] [2021-06-05 21:52:52,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:52:52,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:52,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:52:52,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:52:52,519 INFO L87 Difference]: Start difference. First operand 75 states and 149 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:52,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:52,773 INFO L93 Difference]: Finished difference Result 81 states and 156 transitions. [2021-06-05 21:52:52,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:52:52,774 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:52,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:52,774 INFO L225 Difference]: With dead ends: 81 [2021-06-05 21:52:52,774 INFO L226 Difference]: Without dead ends: 73 [2021-06-05 21:52:52,774 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 280.6ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:52:52,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-06-05 21:52:52,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-06-05 21:52:52,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.013888888888889) internal successors, (145), 72 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:52,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 145 transitions. [2021-06-05 21:52:52,775 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 145 transitions. Word has length 17 [2021-06-05 21:52:52,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:52,775 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 145 transitions. [2021-06-05 21:52:52,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:52,775 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 145 transitions. [2021-06-05 21:52:52,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:52:52,775 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:52,775 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:52,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1183,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:52,989 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:52,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:52,989 INFO L82 PathProgramCache]: Analyzing trace with hash -82381434, now seen corresponding path program 192 times [2021-06-05 21:52:52,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:52,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809708851] [2021-06-05 21:52:52,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:52,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:53,041 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:53,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:53,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809708851] [2021-06-05 21:52:53,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809708851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:53,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236024100] [2021-06-05 21:52:53,041 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:53,071 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:52:53,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:53,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:52:53,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:53,155 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:53,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236024100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:53,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:53,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 21:52:53,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138438872] [2021-06-05 21:52:53,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:52:53,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:53,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:52:53,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:52:53,156 INFO L87 Difference]: Start difference. First operand 73 states and 145 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:53,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:53,259 INFO L93 Difference]: Finished difference Result 85 states and 166 transitions. [2021-06-05 21:52:53,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:52:53,259 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:52:53,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:53,259 INFO L225 Difference]: With dead ends: 85 [2021-06-05 21:52:53,259 INFO L226 Difference]: Without dead ends: 85 [2021-06-05 21:52:53,260 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 100.5ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:52:53,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-06-05 21:52:53,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2021-06-05 21:52:53,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.9696969696969697) internal successors, (130), 66 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:53,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 130 transitions. [2021-06-05 21:52:53,260 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 130 transitions. Word has length 17 [2021-06-05 21:52:53,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:53,261 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 130 transitions. [2021-06-05 21:52:53,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:53,261 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 130 transitions. [2021-06-05 21:52:53,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:52:53,261 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:53,261 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:53,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1187 [2021-06-05 21:52:53,461 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:53,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:53,461 INFO L82 PathProgramCache]: Analyzing trace with hash 413516902, now seen corresponding path program 193 times [2021-06-05 21:52:53,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:53,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650577739] [2021-06-05 21:52:53,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:53,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:53,624 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:53,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:53,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650577739] [2021-06-05 21:52:53,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650577739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:53,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998633734] [2021-06-05 21:52:53,624 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:53,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:53,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:52:53,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:53,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:53,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:53,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:52:53,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:53,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:53,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:52:53,809 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:53,830 INFO L628 ElimStorePlain]: treesize reduction 37, result has 40.3 percent of original size [2021-06-05 21:52:53,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:53,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:52:53,834 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:52:53,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:52:53,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:52:53,842 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 21:52:53,880 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:53,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998633734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:53,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:53,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 21:52:53,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889256255] [2021-06-05 21:52:53,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:52:53,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:53,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:52:53,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:52:53,881 INFO L87 Difference]: Start difference. First operand 67 states and 130 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:54,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:54,119 INFO L93 Difference]: Finished difference Result 120 states and 223 transitions. [2021-06-05 21:52:54,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:52:54,119 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:52:54,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:54,120 INFO L225 Difference]: With dead ends: 120 [2021-06-05 21:52:54,120 INFO L226 Difference]: Without dead ends: 96 [2021-06-05 21:52:54,120 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 404.5ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:52:54,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-06-05 21:52:54,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 69. [2021-06-05 21:52:54,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.9705882352941178) internal successors, (134), 68 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:54,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 134 transitions. [2021-06-05 21:52:54,121 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 134 transitions. Word has length 18 [2021-06-05 21:52:54,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:54,121 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 134 transitions. [2021-06-05 21:52:54,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:54,121 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 134 transitions. [2021-06-05 21:52:54,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:52:54,121 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:54,121 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:54,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1190,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:54,322 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:54,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:54,322 INFO L82 PathProgramCache]: Analyzing trace with hash 293588210, now seen corresponding path program 194 times [2021-06-05 21:52:54,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:54,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167847722] [2021-06-05 21:52:54,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:54,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:54,476 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:54,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:54,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167847722] [2021-06-05 21:52:54,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167847722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:54,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775134109] [2021-06-05 21:52:54,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:54,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:52:54,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:54,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 21:52:54,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:54,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:54,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:52:54,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:54,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:52:54,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:54,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 21:52:54,674 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:54,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:52:54,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:52:54,681 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-06-05 21:52:54,716 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:54,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775134109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:54,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:54,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 21:52:54,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096279122] [2021-06-05 21:52:54,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:52:54,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:54,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:52:54,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:52:54,717 INFO L87 Difference]: Start difference. First operand 69 states and 134 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:54,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:54,990 INFO L93 Difference]: Finished difference Result 116 states and 219 transitions. [2021-06-05 21:52:54,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:52:54,990 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:52:54,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:54,990 INFO L225 Difference]: With dead ends: 116 [2021-06-05 21:52:54,990 INFO L226 Difference]: Without dead ends: 109 [2021-06-05 21:52:54,990 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 386.1ms TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:52:54,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-06-05 21:52:54,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2021-06-05 21:52:54,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.9722222222222223) internal successors, (142), 72 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:54,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 142 transitions. [2021-06-05 21:52:54,991 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 142 transitions. Word has length 18 [2021-06-05 21:52:54,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:54,991 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 142 transitions. [2021-06-05 21:52:54,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:54,991 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 142 transitions. [2021-06-05 21:52:54,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:52:54,992 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:54,992 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:55,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1193 [2021-06-05 21:52:55,192 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:55,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:55,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1245941418, now seen corresponding path program 195 times [2021-06-05 21:52:55,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:55,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717020312] [2021-06-05 21:52:55,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:55,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:55,347 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:55,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:55,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717020312] [2021-06-05 21:52:55,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717020312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:55,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209175268] [2021-06-05 21:52:55,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:55,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:52:55,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:55,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:52:55,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:55,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:55,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:55,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:52:55,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:55,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:55,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:52:55,581 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:55,604 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-06-05 21:52:55,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:55,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:52:55,607 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:52:55,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:52:55,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:52:55,616 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 21:52:55,658 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:55,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209175268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:55,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:55,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 21:52:55,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057934235] [2021-06-05 21:52:55,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:52:55,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:55,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:52:55,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:52:55,659 INFO L87 Difference]: Start difference. First operand 73 states and 142 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:55,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:55,916 INFO L93 Difference]: Finished difference Result 120 states and 224 transitions. [2021-06-05 21:52:55,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:52:55,917 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:52:55,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:55,917 INFO L225 Difference]: With dead ends: 120 [2021-06-05 21:52:55,917 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 21:52:55,917 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 396.5ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:52:55,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 21:52:55,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74. [2021-06-05 21:52:55,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.9726027397260273) internal successors, (144), 73 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:55,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 144 transitions. [2021-06-05 21:52:55,918 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 144 transitions. Word has length 18 [2021-06-05 21:52:55,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:55,918 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 144 transitions. [2021-06-05 21:52:55,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:55,918 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 144 transitions. [2021-06-05 21:52:55,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:52:55,918 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:55,918 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:56,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1196,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:56,119 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:56,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:56,119 INFO L82 PathProgramCache]: Analyzing trace with hash 2107946482, now seen corresponding path program 196 times [2021-06-05 21:52:56,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:56,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550865041] [2021-06-05 21:52:56,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:56,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:56,301 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:56,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:56,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550865041] [2021-06-05 21:52:56,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550865041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:56,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865290804] [2021-06-05 21:52:56,301 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:56,329 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:52:56,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:56,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:52:56,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:56,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:56,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:56,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:52:56,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:56,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:56,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:52:56,571 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:56,593 INFO L628 ElimStorePlain]: treesize reduction 40, result has 38.5 percent of original size [2021-06-05 21:52:56,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:56,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:52:56,597 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:52:56,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:52:56,604 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:52:56,604 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 21:52:56,645 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:56,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865290804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:56,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:56,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 21:52:56,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932837670] [2021-06-05 21:52:56,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:52:56,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:56,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:52:56,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:52:56,646 INFO L87 Difference]: Start difference. First operand 74 states and 144 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:57,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:57,007 INFO L93 Difference]: Finished difference Result 140 states and 263 transitions. [2021-06-05 21:52:57,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:52:57,008 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:52:57,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:57,008 INFO L225 Difference]: With dead ends: 140 [2021-06-05 21:52:57,008 INFO L226 Difference]: Without dead ends: 118 [2021-06-05 21:52:57,008 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 512.2ms TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:52:57,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-06-05 21:52:57,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 76. [2021-06-05 21:52:57,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.9866666666666666) internal successors, (149), 75 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:57,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 149 transitions. [2021-06-05 21:52:57,009 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 149 transitions. Word has length 18 [2021-06-05 21:52:57,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:57,009 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 149 transitions. [2021-06-05 21:52:57,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:57,009 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 149 transitions. [2021-06-05 21:52:57,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:52:57,009 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:57,009 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:57,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1199 [2021-06-05 21:52:57,210 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:57,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:57,210 INFO L82 PathProgramCache]: Analyzing trace with hash -551383242, now seen corresponding path program 197 times [2021-06-05 21:52:57,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:57,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17039115] [2021-06-05 21:52:57,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:57,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:57,374 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:57,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:57,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17039115] [2021-06-05 21:52:57,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17039115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:57,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376340995] [2021-06-05 21:52:57,374 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:57,400 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:52:57,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:57,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:52:57,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:57,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:57,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:57,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:52:57,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:57,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:57,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:52:57,552 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:57,573 INFO L628 ElimStorePlain]: treesize reduction 37, result has 43.1 percent of original size [2021-06-05 21:52:57,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:57,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:52:57,577 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:52:57,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:52:57,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:52:57,585 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 21:52:57,622 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:57,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376340995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:57,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:57,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 21:52:57,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875586405] [2021-06-05 21:52:57,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:52:57,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:57,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:52:57,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:52:57,623 INFO L87 Difference]: Start difference. First operand 76 states and 149 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:57,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:57,821 INFO L93 Difference]: Finished difference Result 97 states and 182 transitions. [2021-06-05 21:52:57,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:52:57,821 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:52:57,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:57,822 INFO L225 Difference]: With dead ends: 97 [2021-06-05 21:52:57,822 INFO L226 Difference]: Without dead ends: 78 [2021-06-05 21:52:57,822 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 304.0ms TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:52:57,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-06-05 21:52:57,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-06-05 21:52:57,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.9870129870129871) internal successors, (153), 77 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:57,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 153 transitions. [2021-06-05 21:52:57,823 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 153 transitions. Word has length 18 [2021-06-05 21:52:57,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:57,823 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 153 transitions. [2021-06-05 21:52:57,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:57,823 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 153 transitions. [2021-06-05 21:52:57,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:52:57,823 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:57,823 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:58,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1203 [2021-06-05 21:52:58,032 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:58,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:58,032 INFO L82 PathProgramCache]: Analyzing trace with hash 400969966, now seen corresponding path program 198 times [2021-06-05 21:52:58,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:58,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597351489] [2021-06-05 21:52:58,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:58,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:58,190 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:58,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:58,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597351489] [2021-06-05 21:52:58,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597351489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:58,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293899751] [2021-06-05 21:52:58,191 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:58,216 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:52:58,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:52:58,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 21:52:58,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:58,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:58,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:52:58,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:58,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:52:58,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:58,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:52:58,394 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:52:58,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:52:58,401 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:52:58,401 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-06-05 21:52:58,444 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:58,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293899751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:58,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:58,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 21:52:58,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545248239] [2021-06-05 21:52:58,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:52:58,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:58,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:52:58,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:52:58,445 INFO L87 Difference]: Start difference. First operand 78 states and 153 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:58,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:58,654 INFO L93 Difference]: Finished difference Result 95 states and 182 transitions. [2021-06-05 21:52:58,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:52:58,655 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:52:58,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:58,655 INFO L225 Difference]: With dead ends: 95 [2021-06-05 21:52:58,655 INFO L226 Difference]: Without dead ends: 88 [2021-06-05 21:52:58,655 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 317.1ms TimeCoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:52:58,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-05 21:52:58,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 79. [2021-06-05 21:52:58,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0) internal successors, (156), 78 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:58,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 156 transitions. [2021-06-05 21:52:58,656 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 156 transitions. Word has length 18 [2021-06-05 21:52:58,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:58,656 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 156 transitions. [2021-06-05 21:52:58,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:58,656 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 156 transitions. [2021-06-05 21:52:58,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:52:58,656 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:58,656 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:58,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1206,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:58,857 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:58,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:58,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1262975030, now seen corresponding path program 199 times [2021-06-05 21:52:58,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:58,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411455770] [2021-06-05 21:52:58,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:58,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:59,028 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:59,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:52:59,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411455770] [2021-06-05 21:52:59,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411455770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:59,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547832188] [2021-06-05 21:52:59,028 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:52:59,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:52:59,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:52:59,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:52:59,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:59,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:59,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:52:59,248 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:59,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:59,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:52:59,251 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:59,273 INFO L628 ElimStorePlain]: treesize reduction 34, result has 47.7 percent of original size [2021-06-05 21:52:59,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:52:59,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 21:52:59,275 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:52:59,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:52:59,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:52:59,283 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 21:52:59,324 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:52:59,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547832188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:52:59,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:52:59,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 21:52:59,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253786364] [2021-06-05 21:52:59,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:52:59,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:52:59,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:52:59,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:52:59,325 INFO L87 Difference]: Start difference. First operand 79 states and 156 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:59,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:52:59,624 INFO L93 Difference]: Finished difference Result 105 states and 201 transitions. [2021-06-05 21:52:59,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:52:59,624 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:52:59,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:52:59,624 INFO L225 Difference]: With dead ends: 105 [2021-06-05 21:52:59,624 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 21:52:59,625 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 380.3ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:52:59,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 21:52:59,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2021-06-05 21:52:59,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.0) internal successors, (158), 79 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:59,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 158 transitions. [2021-06-05 21:52:59,625 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 158 transitions. Word has length 18 [2021-06-05 21:52:59,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:52:59,626 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 158 transitions. [2021-06-05 21:52:59,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:52:59,626 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 158 transitions. [2021-06-05 21:52:59,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:52:59,626 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:52:59,626 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:52:59,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1210 [2021-06-05 21:52:59,826 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:52:59,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:52:59,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1895806994, now seen corresponding path program 200 times [2021-06-05 21:52:59,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:52:59,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762455671] [2021-06-05 21:52:59,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:52:59,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:00,011 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:00,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:00,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762455671] [2021-06-05 21:53:00,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762455671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:00,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521673347] [2021-06-05 21:53:00,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:00,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:53:00,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:00,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 21:53:00,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:00,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:00,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:00,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:00,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:00,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:00,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:53:00,233 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:00,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:00,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:00,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:00,256 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:00,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:00,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:00,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:53:00,282 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:00,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:00,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:53:00,302 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-06-05 21:53:00,375 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:00,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521673347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:00,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:00,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 21:53:00,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897394068] [2021-06-05 21:53:00,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:53:00,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:00,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:53:00,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:53:00,376 INFO L87 Difference]: Start difference. First operand 80 states and 158 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:00,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:00,677 INFO L93 Difference]: Finished difference Result 105 states and 205 transitions. [2021-06-05 21:53:00,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:53:00,677 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:00,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:00,677 INFO L225 Difference]: With dead ends: 105 [2021-06-05 21:53:00,677 INFO L226 Difference]: Without dead ends: 96 [2021-06-05 21:53:00,678 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 440.7ms TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:53:00,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-06-05 21:53:00,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 79. [2021-06-05 21:53:00,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0) internal successors, (156), 78 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:00,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 156 transitions. [2021-06-05 21:53:00,679 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 156 transitions. Word has length 18 [2021-06-05 21:53:00,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:00,679 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 156 transitions. [2021-06-05 21:53:00,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:00,679 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 156 transitions. [2021-06-05 21:53:00,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:00,679 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:00,679 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:00,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1214,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:00,879 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:00,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:00,880 INFO L82 PathProgramCache]: Analyzing trace with hash -484828314, now seen corresponding path program 201 times [2021-06-05 21:53:00,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:00,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778017284] [2021-06-05 21:53:00,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:00,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:01,024 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:01,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:01,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778017284] [2021-06-05 21:53:01,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778017284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:01,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774038342] [2021-06-05 21:53:01,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:01,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:53:01,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:01,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:53:01,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:01,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:01,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:01,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:01,191 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:01,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:01,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:01,194 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:01,215 INFO L628 ElimStorePlain]: treesize reduction 34, result has 45.2 percent of original size [2021-06-05 21:53:01,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:01,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:53:01,219 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:01,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:01,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:53:01,227 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 21:53:01,265 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:01,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774038342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:01,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:01,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 21:53:01,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138218058] [2021-06-05 21:53:01,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:53:01,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:01,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:53:01,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:53:01,266 INFO L87 Difference]: Start difference. First operand 79 states and 156 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:01,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:01,476 INFO L93 Difference]: Finished difference Result 99 states and 188 transitions. [2021-06-05 21:53:01,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:53:01,476 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:01,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:01,477 INFO L225 Difference]: With dead ends: 99 [2021-06-05 21:53:01,477 INFO L226 Difference]: Without dead ends: 83 [2021-06-05 21:53:01,477 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 321.5ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:53:01,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-06-05 21:53:01,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-06-05 21:53:01,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0) internal successors, (164), 82 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:01,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 164 transitions. [2021-06-05 21:53:01,478 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 164 transitions. Word has length 18 [2021-06-05 21:53:01,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:01,478 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 164 transitions. [2021-06-05 21:53:01,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:01,478 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 164 transitions. [2021-06-05 21:53:01,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:01,478 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:01,478 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:01,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1219,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:01,678 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:01,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:01,679 INFO L82 PathProgramCache]: Analyzing trace with hash 377176750, now seen corresponding path program 202 times [2021-06-05 21:53:01,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:01,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727693597] [2021-06-05 21:53:01,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:01,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:01,841 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:01,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:01,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727693597] [2021-06-05 21:53:01,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727693597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:01,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920730894] [2021-06-05 21:53:01,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:01,865 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:53:01,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:01,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:53:01,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:02,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:02,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:02,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:02,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:02,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:02,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:02,030 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:02,050 INFO L628 ElimStorePlain]: treesize reduction 37, result has 40.3 percent of original size [2021-06-05 21:53:02,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:02,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:53:02,054 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:02,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:02,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:53:02,061 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 21:53:02,096 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:02,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920730894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:02,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:02,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 21:53:02,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184991669] [2021-06-05 21:53:02,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:53:02,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:02,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:53:02,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:53:02,097 INFO L87 Difference]: Start difference. First operand 83 states and 164 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:02,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:02,452 INFO L93 Difference]: Finished difference Result 101 states and 196 transitions. [2021-06-05 21:53:02,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:53:02,453 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:02,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:02,453 INFO L225 Difference]: With dead ends: 101 [2021-06-05 21:53:02,453 INFO L226 Difference]: Without dead ends: 88 [2021-06-05 21:53:02,453 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 403.0ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:53:02,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-05 21:53:02,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2021-06-05 21:53:02,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0) internal successors, (166), 83 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:02,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 166 transitions. [2021-06-05 21:53:02,454 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 166 transitions. Word has length 18 [2021-06-05 21:53:02,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:02,454 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 166 transitions. [2021-06-05 21:53:02,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:02,454 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 166 transitions. [2021-06-05 21:53:02,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:02,454 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:02,454 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:02,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1223,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:02,655 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:02,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:02,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1513362022, now seen corresponding path program 203 times [2021-06-05 21:53:02,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:02,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830892580] [2021-06-05 21:53:02,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:02,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:02,843 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:02,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:02,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830892580] [2021-06-05 21:53:02,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830892580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:02,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574357156] [2021-06-05 21:53:02,843 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:02,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:53:02,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:02,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:53:02,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:02,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:03,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:03,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:03,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:03,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:03,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:03,004 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:03,066 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-06-05 21:53:03,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:03,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:53:03,070 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:03,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:03,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:03,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:03,097 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:03,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:03,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:03,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:53:03,123 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:03,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:03,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:53:03,145 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 21:53:03,223 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:03,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574357156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:03,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:03,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 21:53:03,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579795686] [2021-06-05 21:53:03,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:53:03,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:03,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:53:03,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:53:03,223 INFO L87 Difference]: Start difference. First operand 84 states and 166 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:03,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:03,685 INFO L93 Difference]: Finished difference Result 121 states and 225 transitions. [2021-06-05 21:53:03,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:53:03,686 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:03,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:03,686 INFO L225 Difference]: With dead ends: 121 [2021-06-05 21:53:03,686 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 21:53:03,686 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 553.4ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:53:03,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 21:53:03,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 86. [2021-06-05 21:53:03,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.023529411764706) internal successors, (172), 85 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:03,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 172 transitions. [2021-06-05 21:53:03,687 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 172 transitions. Word has length 18 [2021-06-05 21:53:03,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:03,687 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 172 transitions. [2021-06-05 21:53:03,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:03,687 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 172 transitions. [2021-06-05 21:53:03,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:03,687 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:03,687 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:03,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1227 [2021-06-05 21:53:03,888 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:03,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:03,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1729607370, now seen corresponding path program 204 times [2021-06-05 21:53:03,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:03,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556657067] [2021-06-05 21:53:03,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:03,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:04,037 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:04,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:04,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556657067] [2021-06-05 21:53:04,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556657067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:04,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008873327] [2021-06-05 21:53:04,037 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:04,063 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:53:04,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:04,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:53:04,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:04,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:04,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:04,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:04,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:04,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:04,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:04,214 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:04,236 INFO L628 ElimStorePlain]: treesize reduction 37, result has 43.1 percent of original size [2021-06-05 21:53:04,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:04,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:53:04,239 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:04,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:04,247 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:53:04,247 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 21:53:04,285 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:04,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008873327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:04,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:04,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 21:53:04,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818578709] [2021-06-05 21:53:04,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:53:04,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:04,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:53:04,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:53:04,286 INFO L87 Difference]: Start difference. First operand 86 states and 172 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:04,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:04,657 INFO L93 Difference]: Finished difference Result 110 states and 216 transitions. [2021-06-05 21:53:04,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:53:04,657 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:04,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:04,658 INFO L225 Difference]: With dead ends: 110 [2021-06-05 21:53:04,658 INFO L226 Difference]: Without dead ends: 97 [2021-06-05 21:53:04,658 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 406.3ms TimeCoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:53:04,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-06-05 21:53:04,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 93. [2021-06-05 21:53:04,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.0217391304347827) internal successors, (186), 92 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:04,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 186 transitions. [2021-06-05 21:53:04,659 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 186 transitions. Word has length 18 [2021-06-05 21:53:04,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:04,659 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 186 transitions. [2021-06-05 21:53:04,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:04,659 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 186 transitions. [2021-06-05 21:53:04,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:04,659 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:04,659 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:04,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1232,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:04,860 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:04,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:04,860 INFO L82 PathProgramCache]: Analyzing trace with hash -593422098, now seen corresponding path program 205 times [2021-06-05 21:53:04,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:04,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413168896] [2021-06-05 21:53:04,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:04,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:05,058 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:05,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:05,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413168896] [2021-06-05 21:53:05,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413168896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:05,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566835488] [2021-06-05 21:53:05,058 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:05,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:05,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:53:05,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:05,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:05,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:05,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:05,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:05,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:05,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:05,191 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:05,252 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-06-05 21:53:05,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:05,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:53:05,257 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:05,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:05,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:05,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:05,284 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:05,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:05,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:05,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:53:05,310 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:05,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:05,332 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:53:05,332 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 21:53:05,408 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:05,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566835488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:05,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:05,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 21:53:05,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427260221] [2021-06-05 21:53:05,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:53:05,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:05,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:53:05,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:53:05,409 INFO L87 Difference]: Start difference. First operand 93 states and 186 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:05,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:05,958 INFO L93 Difference]: Finished difference Result 131 states and 247 transitions. [2021-06-05 21:53:05,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:53:05,959 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:05,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:05,959 INFO L225 Difference]: With dead ends: 131 [2021-06-05 21:53:05,959 INFO L226 Difference]: Without dead ends: 112 [2021-06-05 21:53:05,959 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 630.1ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:53:05,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-06-05 21:53:05,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 92. [2021-06-05 21:53:05,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.021978021978022) internal successors, (184), 91 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:05,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 184 transitions. [2021-06-05 21:53:05,960 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 184 transitions. Word has length 18 [2021-06-05 21:53:05,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:05,960 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 184 transitions. [2021-06-05 21:53:05,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:05,961 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 184 transitions. [2021-06-05 21:53:05,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:05,961 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:05,961 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:06,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1235 [2021-06-05 21:53:06,161 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:06,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:06,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1555374438, now seen corresponding path program 206 times [2021-06-05 21:53:06,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:06,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062919040] [2021-06-05 21:53:06,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:06,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:06,340 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:06,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:06,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062919040] [2021-06-05 21:53:06,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062919040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:06,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822937110] [2021-06-05 21:53:06,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:06,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:53:06,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:06,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 21:53:06,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:06,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:06,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:06,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:06,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:06,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:06,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:06,448 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:06,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:06,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:06,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:06,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:53:06,475 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:06,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:06,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:53:06,479 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:06,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:06,501 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:53:06,501 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 21:53:06,572 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:06,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822937110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:06,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:06,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 21:53:06,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837086395] [2021-06-05 21:53:06,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:53:06,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:06,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:53:06,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:53:06,573 INFO L87 Difference]: Start difference. First operand 92 states and 184 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:07,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:07,458 INFO L93 Difference]: Finished difference Result 160 states and 305 transitions. [2021-06-05 21:53:07,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:53:07,458 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:07,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:07,458 INFO L225 Difference]: With dead ends: 160 [2021-06-05 21:53:07,458 INFO L226 Difference]: Without dead ends: 137 [2021-06-05 21:53:07,458 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 861.5ms TimeCoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:53:07,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-06-05 21:53:07,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 95. [2021-06-05 21:53:07,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.0638297872340425) internal successors, (194), 94 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:07,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 194 transitions. [2021-06-05 21:53:07,459 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 194 transitions. Word has length 18 [2021-06-05 21:53:07,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:07,460 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 194 transitions. [2021-06-05 21:53:07,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:07,460 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 194 transitions. [2021-06-05 21:53:07,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:07,460 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:07,460 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:07,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1240,207 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:07,660 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:07,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:07,661 INFO L82 PathProgramCache]: Analyzing trace with hash -975694478, now seen corresponding path program 207 times [2021-06-05 21:53:07,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:07,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425666711] [2021-06-05 21:53:07,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:07,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:07,833 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:07,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:07,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425666711] [2021-06-05 21:53:07,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425666711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:07,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201084595] [2021-06-05 21:53:07,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:07,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:53:07,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:07,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:53:07,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:08,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:08,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:08,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:08,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:08,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:08,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:08,031 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:08,061 INFO L628 ElimStorePlain]: treesize reduction 34, result has 45.2 percent of original size [2021-06-05 21:53:08,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:08,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:53:08,065 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:08,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:08,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:53:08,073 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 21:53:08,112 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:08,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201084595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:08,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:08,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 21:53:08,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940286698] [2021-06-05 21:53:08,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:53:08,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:08,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:53:08,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:53:08,112 INFO L87 Difference]: Start difference. First operand 95 states and 194 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:08,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:08,268 INFO L93 Difference]: Finished difference Result 117 states and 228 transitions. [2021-06-05 21:53:08,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:53:08,268 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:08,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:08,268 INFO L225 Difference]: With dead ends: 117 [2021-06-05 21:53:08,268 INFO L226 Difference]: Without dead ends: 98 [2021-06-05 21:53:08,269 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 326.3ms TimeCoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:53:08,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-06-05 21:53:08,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2021-06-05 21:53:08,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.0631578947368423) internal successors, (196), 95 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:08,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 196 transitions. [2021-06-05 21:53:08,270 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 196 transitions. Word has length 18 [2021-06-05 21:53:08,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:08,270 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 196 transitions. [2021-06-05 21:53:08,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:08,270 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 196 transitions. [2021-06-05 21:53:08,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:08,270 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:08,270 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:08,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1243 [2021-06-05 21:53:08,470 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:08,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:08,471 INFO L82 PathProgramCache]: Analyzing trace with hash -23341270, now seen corresponding path program 208 times [2021-06-05 21:53:08,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:08,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249555102] [2021-06-05 21:53:08,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:08,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:08,637 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:08,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:08,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249555102] [2021-06-05 21:53:08,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249555102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:08,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489848100] [2021-06-05 21:53:08,638 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:08,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:53:08,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:08,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:53:08,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:08,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:08,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:08,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:53:08,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:08,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:08,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:53:08,864 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:08,886 INFO L628 ElimStorePlain]: treesize reduction 40, result has 38.5 percent of original size [2021-06-05 21:53:08,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:08,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:53:08,889 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:08,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:08,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:53:08,896 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 21:53:08,936 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:08,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489848100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:08,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:08,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 21:53:08,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271266208] [2021-06-05 21:53:08,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:53:08,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:08,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:53:08,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:53:08,937 INFO L87 Difference]: Start difference. First operand 96 states and 196 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:09,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:09,181 INFO L93 Difference]: Finished difference Result 115 states and 225 transitions. [2021-06-05 21:53:09,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:53:09,181 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:09,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:09,182 INFO L225 Difference]: With dead ends: 115 [2021-06-05 21:53:09,182 INFO L226 Difference]: Without dead ends: 99 [2021-06-05 21:53:09,182 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 376.1ms TimeCoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:53:09,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-06-05 21:53:09,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2021-06-05 21:53:09,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0625) internal successors, (198), 96 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:09,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 198 transitions. [2021-06-05 21:53:09,183 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 198 transitions. Word has length 18 [2021-06-05 21:53:09,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:09,183 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 198 transitions. [2021-06-05 21:53:09,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:09,183 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 198 transitions. [2021-06-05 21:53:09,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:09,183 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:09,183 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:09,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1247 [2021-06-05 21:53:09,384 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:09,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:09,384 INFO L82 PathProgramCache]: Analyzing trace with hash 838663794, now seen corresponding path program 209 times [2021-06-05 21:53:09,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:09,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998642687] [2021-06-05 21:53:09,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:09,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:09,560 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:09,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:09,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998642687] [2021-06-05 21:53:09,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998642687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:09,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550801499] [2021-06-05 21:53:09,561 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:09,586 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:53:09,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:09,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:53:09,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:09,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:09,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:09,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:53:09,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:09,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:09,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:53:09,813 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:09,835 INFO L628 ElimStorePlain]: treesize reduction 40, result has 38.5 percent of original size [2021-06-05 21:53:09,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:09,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:53:09,838 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:09,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:09,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:53:09,846 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 21:53:09,886 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:09,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550801499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:09,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:09,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 21:53:09,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168107333] [2021-06-05 21:53:09,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:53:09,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:09,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:53:09,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:53:09,887 INFO L87 Difference]: Start difference. First operand 97 states and 198 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:10,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:10,225 INFO L93 Difference]: Finished difference Result 117 states and 233 transitions. [2021-06-05 21:53:10,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:53:10,225 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:10,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:10,225 INFO L225 Difference]: With dead ends: 117 [2021-06-05 21:53:10,225 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 21:53:10,225 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 434.8ms TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:53:10,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 21:53:10,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 98. [2021-06-05 21:53:10,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.0618556701030926) internal successors, (200), 97 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:10,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 200 transitions. [2021-06-05 21:53:10,227 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 200 transitions. Word has length 18 [2021-06-05 21:53:10,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:10,227 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 200 transitions. [2021-06-05 21:53:10,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:10,227 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 200 transitions. [2021-06-05 21:53:10,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:10,227 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:10,227 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:10,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1251,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:10,427 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:10,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:10,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1974849066, now seen corresponding path program 210 times [2021-06-05 21:53:10,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:10,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724802377] [2021-06-05 21:53:10,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:10,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:10,631 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:10,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:10,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724802377] [2021-06-05 21:53:10,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724802377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:10,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016546395] [2021-06-05 21:53:10,631 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:10,661 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:53:10,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:10,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 21:53:10,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:10,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:10,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:10,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:10,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:10,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:10,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:53:10,860 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:10,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:10,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:10,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:10,885 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:10,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:10,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:10,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:53:10,909 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:10,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:10,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:53:10,928 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-06-05 21:53:11,008 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:11,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016546395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:11,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:11,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 21:53:11,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914086642] [2021-06-05 21:53:11,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:53:11,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:11,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:53:11,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:53:11,009 INFO L87 Difference]: Start difference. First operand 98 states and 200 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:11,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:11,366 INFO L93 Difference]: Finished difference Result 118 states and 239 transitions. [2021-06-05 21:53:11,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:53:11,366 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:11,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:11,366 INFO L225 Difference]: With dead ends: 118 [2021-06-05 21:53:11,366 INFO L226 Difference]: Without dead ends: 109 [2021-06-05 21:53:11,366 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 557.1ms TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:53:11,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-06-05 21:53:11,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 96. [2021-06-05 21:53:11,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.0631578947368423) internal successors, (196), 95 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:11,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 196 transitions. [2021-06-05 21:53:11,367 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 196 transitions. Word has length 18 [2021-06-05 21:53:11,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:11,368 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 196 transitions. [2021-06-05 21:53:11,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:11,368 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 196 transitions. [2021-06-05 21:53:11,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:11,368 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:11,368 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:11,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1255,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:11,568 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:11,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:11,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1695884842, now seen corresponding path program 211 times [2021-06-05 21:53:11,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:11,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999657401] [2021-06-05 21:53:11,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:11,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:11,714 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:11,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:11,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999657401] [2021-06-05 21:53:11,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999657401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:11,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811099242] [2021-06-05 21:53:11,715 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:11,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:11,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:53:11,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:11,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:11,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:11,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:53:11,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:11,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:11,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:53:11,889 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:11,910 INFO L628 ElimStorePlain]: treesize reduction 34, result has 47.7 percent of original size [2021-06-05 21:53:11,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:11,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 21:53:11,913 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:11,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:11,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:53:11,922 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 21:53:11,960 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:11,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811099242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:11,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:11,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 21:53:11,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897484982] [2021-06-05 21:53:11,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:53:11,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:11,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:53:11,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:53:11,961 INFO L87 Difference]: Start difference. First operand 96 states and 196 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:12,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:12,143 INFO L93 Difference]: Finished difference Result 116 states and 227 transitions. [2021-06-05 21:53:12,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:53:12,144 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:12,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:12,144 INFO L225 Difference]: With dead ends: 116 [2021-06-05 21:53:12,144 INFO L226 Difference]: Without dead ends: 100 [2021-06-05 21:53:12,144 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 308.9ms TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:53:12,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-05 21:53:12,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2021-06-05 21:53:12,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.0618556701030926) internal successors, (200), 97 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:12,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 200 transitions. [2021-06-05 21:53:12,145 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 200 transitions. Word has length 18 [2021-06-05 21:53:12,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:12,145 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 200 transitions. [2021-06-05 21:53:12,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:12,145 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 200 transitions. [2021-06-05 21:53:12,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:12,145 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:12,145 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:12,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1260,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:12,346 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:12,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:12,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1737077390, now seen corresponding path program 212 times [2021-06-05 21:53:12,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:12,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747546783] [2021-06-05 21:53:12,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:12,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:12,510 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:12,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:12,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747546783] [2021-06-05 21:53:12,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747546783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:12,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119365074] [2021-06-05 21:53:12,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:12,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:53:12,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:12,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 21:53:12,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:12,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:12,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:12,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:12,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:12,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:12,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:53:12,717 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:12,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:12,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:53:12,724 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2021-06-05 21:53:12,762 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:12,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119365074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:12,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:12,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 21:53:12,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062035327] [2021-06-05 21:53:12,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:53:12,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:12,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:53:12,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:53:12,762 INFO L87 Difference]: Start difference. First operand 98 states and 200 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:13,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:13,110 INFO L93 Difference]: Finished difference Result 118 states and 238 transitions. [2021-06-05 21:53:13,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:53:13,110 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:13,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:13,110 INFO L225 Difference]: With dead ends: 118 [2021-06-05 21:53:13,110 INFO L226 Difference]: Without dead ends: 111 [2021-06-05 21:53:13,110 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 433.7ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:53:13,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-06-05 21:53:13,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 99. [2021-06-05 21:53:13,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.0714285714285716) internal successors, (203), 98 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:13,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 203 transitions. [2021-06-05 21:53:13,111 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 203 transitions. Word has length 18 [2021-06-05 21:53:13,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:13,111 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 203 transitions. [2021-06-05 21:53:13,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:13,112 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 203 transitions. [2021-06-05 21:53:13,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:13,112 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:13,112 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:13,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1263,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:13,312 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:13,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:13,312 INFO L82 PathProgramCache]: Analyzing trace with hash -600892118, now seen corresponding path program 213 times [2021-06-05 21:53:13,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:13,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854250103] [2021-06-05 21:53:13,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:13,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:13,520 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:13,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:13,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854250103] [2021-06-05 21:53:13,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854250103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:13,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360191300] [2021-06-05 21:53:13,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:13,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:53:13,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:13,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 21:53:13,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:13,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:13,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:13,689 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:13,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:13,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:13,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:53:13,716 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:13,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:13,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:13,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:13,741 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:13,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:13,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:13,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:53:13,765 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:13,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:13,784 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:53:13,785 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-06-05 21:53:13,858 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:13,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360191300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:13,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:13,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 21:53:13,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529329674] [2021-06-05 21:53:13,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:53:13,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:13,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:53:13,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:53:13,859 INFO L87 Difference]: Start difference. First operand 99 states and 203 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:14,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:14,441 INFO L93 Difference]: Finished difference Result 145 states and 280 transitions. [2021-06-05 21:53:14,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:53:14,441 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:14,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:14,442 INFO L225 Difference]: With dead ends: 145 [2021-06-05 21:53:14,442 INFO L226 Difference]: Without dead ends: 129 [2021-06-05 21:53:14,442 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 648.0ms TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:53:14,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-06-05 21:53:14,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 100. [2021-06-05 21:53:14,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.080808080808081) internal successors, (206), 99 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:14,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 206 transitions. [2021-06-05 21:53:14,443 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 206 transitions. Word has length 18 [2021-06-05 21:53:14,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:14,443 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 206 transitions. [2021-06-05 21:53:14,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:14,443 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 206 transitions. [2021-06-05 21:53:14,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:14,443 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:14,443 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:14,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1267 [2021-06-05 21:53:14,644 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:14,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:14,644 INFO L82 PathProgramCache]: Analyzing trace with hash -434692494, now seen corresponding path program 214 times [2021-06-05 21:53:14,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:14,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227325801] [2021-06-05 21:53:14,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:14,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:14,785 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:14,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:14,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227325801] [2021-06-05 21:53:14,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227325801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:14,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070752522] [2021-06-05 21:53:14,786 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:14,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:53:14,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:14,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:53:14,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:14,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:14,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:14,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:53:14,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:14,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:14,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:53:14,967 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:14,988 INFO L628 ElimStorePlain]: treesize reduction 40, result has 38.5 percent of original size [2021-06-05 21:53:14,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:14,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:53:14,992 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:14,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:15,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:53:15,002 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 21:53:15,040 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:15,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070752522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:15,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:15,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 21:53:15,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641297884] [2021-06-05 21:53:15,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:53:15,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:15,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:53:15,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:53:15,041 INFO L87 Difference]: Start difference. First operand 100 states and 206 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:15,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:15,403 INFO L93 Difference]: Finished difference Result 124 states and 249 transitions. [2021-06-05 21:53:15,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:53:15,403 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:15,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:15,403 INFO L225 Difference]: With dead ends: 124 [2021-06-05 21:53:15,404 INFO L226 Difference]: Without dead ends: 111 [2021-06-05 21:53:15,404 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 415.9ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:53:15,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-06-05 21:53:15,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 105. [2021-06-05 21:53:15,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.076923076923077) internal successors, (216), 104 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:15,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 216 transitions. [2021-06-05 21:53:15,405 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 216 transitions. Word has length 18 [2021-06-05 21:53:15,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:15,405 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 216 transitions. [2021-06-05 21:53:15,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:15,405 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 216 transitions. [2021-06-05 21:53:15,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:15,405 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:15,405 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:15,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1272,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:15,606 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:15,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:15,606 INFO L82 PathProgramCache]: Analyzing trace with hash 701492778, now seen corresponding path program 215 times [2021-06-05 21:53:15,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:15,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581619271] [2021-06-05 21:53:15,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:15,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:15,786 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:15,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:15,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581619271] [2021-06-05 21:53:15,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581619271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:15,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452306126] [2021-06-05 21:53:15,786 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:15,811 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:53:15,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:15,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:53:15,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:15,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:15,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:15,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:15,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:15,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:15,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:15,931 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:15,992 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-06-05 21:53:15,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:15,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:15,996 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:16,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:16,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:16,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:53:16,022 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:16,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:16,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:16,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:53:16,048 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:16,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:16,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:53:16,070 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 21:53:16,147 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:16,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452306126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:16,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:16,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 21:53:16,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008762317] [2021-06-05 21:53:16,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:53:16,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:16,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:53:16,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:53:16,148 INFO L87 Difference]: Start difference. First operand 105 states and 216 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:16,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:16,548 INFO L93 Difference]: Finished difference Result 146 states and 282 transitions. [2021-06-05 21:53:16,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:53:16,548 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:16,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:16,548 INFO L225 Difference]: With dead ends: 146 [2021-06-05 21:53:16,548 INFO L226 Difference]: Without dead ends: 127 [2021-06-05 21:53:16,549 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 524.2ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:53:16,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-05 21:53:16,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 104. [2021-06-05 21:53:16,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0776699029126213) internal successors, (214), 103 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:16,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 214 transitions. [2021-06-05 21:53:16,550 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 214 transitions. Word has length 18 [2021-06-05 21:53:16,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:16,550 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 214 transitions. [2021-06-05 21:53:16,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:16,550 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 214 transitions. [2021-06-05 21:53:16,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:16,550 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:16,550 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:16,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1276 [2021-06-05 21:53:16,750 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:16,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:16,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1444677982, now seen corresponding path program 216 times [2021-06-05 21:53:16,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:16,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127403103] [2021-06-05 21:53:16,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:16,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:16,925 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:16,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:16,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127403103] [2021-06-05 21:53:16,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127403103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:16,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585290208] [2021-06-05 21:53:16,925 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:16,950 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:53:16,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:16,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 21:53:16,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:17,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:17,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:17,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:17,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:17,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:17,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:17,040 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:17,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:17,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:17,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:17,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:53:17,069 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:17,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:17,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:53:17,072 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:17,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:17,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:53:17,098 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 21:53:17,171 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:17,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585290208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:17,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:17,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 21:53:17,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162388151] [2021-06-05 21:53:17,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:53:17,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:17,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:53:17,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:53:17,172 INFO L87 Difference]: Start difference. First operand 104 states and 214 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:17,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:17,890 INFO L93 Difference]: Finished difference Result 170 states and 330 transitions. [2021-06-05 21:53:17,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:53:17,890 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:17,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:17,890 INFO L225 Difference]: With dead ends: 170 [2021-06-05 21:53:17,890 INFO L226 Difference]: Without dead ends: 147 [2021-06-05 21:53:17,891 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 763.6ms TimeCoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:53:17,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-05 21:53:17,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 103. [2021-06-05 21:53:17,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0784313725490198) internal successors, (212), 102 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:17,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 212 transitions. [2021-06-05 21:53:17,892 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 212 transitions. Word has length 18 [2021-06-05 21:53:17,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:17,892 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 212 transitions. [2021-06-05 21:53:17,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:17,892 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 212 transitions. [2021-06-05 21:53:17,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:17,892 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:17,892 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:18,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1281 [2021-06-05 21:53:18,109 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:18,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:18,109 INFO L82 PathProgramCache]: Analyzing trace with hash 743505194, now seen corresponding path program 217 times [2021-06-05 21:53:18,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:18,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115440703] [2021-06-05 21:53:18,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:18,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:18,300 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:18,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:18,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115440703] [2021-06-05 21:53:18,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115440703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:18,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709033018] [2021-06-05 21:53:18,300 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:18,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:18,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:53:18,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:18,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:18,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:18,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:18,435 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:18,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:18,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:18,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:18,439 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:18,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:18,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:18,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:18,443 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:18,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:18,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:18,446 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:18,504 INFO L628 ElimStorePlain]: treesize reduction 90, result has 38.8 percent of original size [2021-06-05 21:53:18,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:18,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:53:18,508 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:18,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:18,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:53:18,532 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:173, output treesize:36 [2021-06-05 21:53:18,609 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:18,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709033018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:18,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:18,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 21:53:18,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830476198] [2021-06-05 21:53:18,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:53:18,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:18,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:53:18,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:53:18,610 INFO L87 Difference]: Start difference. First operand 103 states and 212 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:19,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:19,253 INFO L93 Difference]: Finished difference Result 157 states and 309 transitions. [2021-06-05 21:53:19,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:53:19,254 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:19,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:19,254 INFO L225 Difference]: With dead ends: 157 [2021-06-05 21:53:19,254 INFO L226 Difference]: Without dead ends: 138 [2021-06-05 21:53:19,254 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 718.9ms TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:53:19,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-06-05 21:53:19,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 106. [2021-06-05 21:53:19,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.0952380952380953) internal successors, (220), 105 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:19,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 220 transitions. [2021-06-05 21:53:19,257 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 220 transitions. Word has length 18 [2021-06-05 21:53:19,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:19,257 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 220 transitions. [2021-06-05 21:53:19,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:19,258 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 220 transitions. [2021-06-05 21:53:19,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:19,258 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:19,258 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:19,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1284,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:19,458 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:19,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:19,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1244440906, now seen corresponding path program 218 times [2021-06-05 21:53:19,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:19,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334352214] [2021-06-05 21:53:19,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:19,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:19,647 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:19,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:19,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334352214] [2021-06-05 21:53:19,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334352214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:19,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196779189] [2021-06-05 21:53:19,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:19,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:53:19,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:19,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:53:19,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:19,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:19,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:19,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:19,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:19,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:19,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:19,856 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:19,878 INFO L628 ElimStorePlain]: treesize reduction 37, result has 43.1 percent of original size [2021-06-05 21:53:19,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:19,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:53:19,881 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:19,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:19,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:53:19,889 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 21:53:19,931 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:19,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196779189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:19,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:19,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:53:19,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826630610] [2021-06-05 21:53:19,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:53:19,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:19,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:53:19,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:53:19,931 INFO L87 Difference]: Start difference. First operand 106 states and 220 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:20,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:20,081 INFO L93 Difference]: Finished difference Result 128 states and 254 transitions. [2021-06-05 21:53:20,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:53:20,082 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:20,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:20,082 INFO L225 Difference]: With dead ends: 128 [2021-06-05 21:53:20,082 INFO L226 Difference]: Without dead ends: 109 [2021-06-05 21:53:20,082 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 363.8ms TimeCoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:53:20,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-06-05 21:53:20,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2021-06-05 21:53:20,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0943396226415096) internal successors, (222), 106 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:20,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 222 transitions. [2021-06-05 21:53:20,083 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 222 transitions. Word has length 18 [2021-06-05 21:53:20,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:20,083 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 222 transitions. [2021-06-05 21:53:20,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:20,083 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 222 transitions. [2021-06-05 21:53:20,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:20,084 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:20,084 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:20,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1287 [2021-06-05 21:53:20,284 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:20,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:20,284 INFO L82 PathProgramCache]: Analyzing trace with hash -292087698, now seen corresponding path program 219 times [2021-06-05 21:53:20,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:20,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116911633] [2021-06-05 21:53:20,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:20,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:20,461 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:20,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:20,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116911633] [2021-06-05 21:53:20,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116911633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:20,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524286649] [2021-06-05 21:53:20,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:20,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:53:20,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:20,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:53:20,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:20,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:20,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:20,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:53:20,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:20,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:20,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:53:20,697 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:20,719 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-06-05 21:53:20,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:20,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:53:20,722 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:20,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:20,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:53:20,730 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 21:53:20,771 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:20,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524286649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:20,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:20,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:53:20,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669204308] [2021-06-05 21:53:20,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:53:20,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:20,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:53:20,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:53:20,771 INFO L87 Difference]: Start difference. First operand 107 states and 222 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:20,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:20,969 INFO L93 Difference]: Finished difference Result 126 states and 251 transitions. [2021-06-05 21:53:20,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:53:20,969 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:20,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:20,970 INFO L225 Difference]: With dead ends: 126 [2021-06-05 21:53:20,970 INFO L226 Difference]: Without dead ends: 110 [2021-06-05 21:53:20,970 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 410.5ms TimeCoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:53:20,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-06-05 21:53:20,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2021-06-05 21:53:20,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0934579439252334) internal successors, (224), 107 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:20,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 224 transitions. [2021-06-05 21:53:20,971 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 224 transitions. Word has length 18 [2021-06-05 21:53:20,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:20,971 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 224 transitions. [2021-06-05 21:53:20,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:20,971 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 224 transitions. [2021-06-05 21:53:20,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:20,971 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:20,971 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:21,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1291,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:21,172 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:21,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:21,172 INFO L82 PathProgramCache]: Analyzing trace with hash 569917366, now seen corresponding path program 220 times [2021-06-05 21:53:21,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:21,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842338031] [2021-06-05 21:53:21,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:21,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:21,360 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:21,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:21,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842338031] [2021-06-05 21:53:21,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842338031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:21,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160696958] [2021-06-05 21:53:21,361 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:21,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:53:21,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:21,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:53:21,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:21,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:21,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:21,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:21,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:21,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:21,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:21,606 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:21,627 INFO L628 ElimStorePlain]: treesize reduction 37, result has 40.3 percent of original size [2021-06-05 21:53:21,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:21,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:53:21,630 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:21,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:21,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:53:21,638 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 21:53:21,683 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:21,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160696958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:21,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:21,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:53:21,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085612141] [2021-06-05 21:53:21,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:53:21,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:21,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:53:21,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:53:21,683 INFO L87 Difference]: Start difference. First operand 108 states and 224 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:22,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:22,025 INFO L93 Difference]: Finished difference Result 127 states and 257 transitions. [2021-06-05 21:53:22,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:53:22,025 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:22,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:22,025 INFO L225 Difference]: With dead ends: 127 [2021-06-05 21:53:22,026 INFO L226 Difference]: Without dead ends: 114 [2021-06-05 21:53:22,026 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 502.8ms TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:53:22,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-06-05 21:53:22,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 109. [2021-06-05 21:53:22,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.0925925925925926) internal successors, (226), 108 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:22,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 226 transitions. [2021-06-05 21:53:22,027 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 226 transitions. Word has length 18 [2021-06-05 21:53:22,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:22,027 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 226 transitions. [2021-06-05 21:53:22,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:22,027 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 226 transitions. [2021-06-05 21:53:22,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:22,027 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:22,027 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:22,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1295,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:22,228 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:22,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:22,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1706102638, now seen corresponding path program 221 times [2021-06-05 21:53:22,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:22,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680385483] [2021-06-05 21:53:22,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:22,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:22,426 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:22,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:22,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680385483] [2021-06-05 21:53:22,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680385483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:22,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140790344] [2021-06-05 21:53:22,426 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:22,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:53:22,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:22,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:53:22,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:22,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:22,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:22,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:22,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:22,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:22,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:22,645 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:22,707 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-06-05 21:53:22,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:22,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:53:22,711 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:22,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:22,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:22,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:22,739 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:22,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:22,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:22,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:53:22,765 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:22,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:22,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:53:22,788 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 21:53:22,873 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:22,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140790344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:22,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:22,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:53:22,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922252282] [2021-06-05 21:53:22,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:53:22,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:22,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:53:22,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:53:22,874 INFO L87 Difference]: Start difference. First operand 109 states and 226 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:23,664 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2021-06-05 21:53:24,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:24,258 INFO L93 Difference]: Finished difference Result 253 states and 456 transitions. [2021-06-05 21:53:24,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:53:24,259 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:24,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:24,259 INFO L225 Difference]: With dead ends: 253 [2021-06-05 21:53:24,259 INFO L226 Difference]: Without dead ends: 213 [2021-06-05 21:53:24,259 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1458.9ms TimeCoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 21:53:24,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-06-05 21:53:24,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 113. [2021-06-05 21:53:24,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.142857142857143) internal successors, (240), 112 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:24,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 240 transitions. [2021-06-05 21:53:24,260 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 240 transitions. Word has length 18 [2021-06-05 21:53:24,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:24,260 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 240 transitions. [2021-06-05 21:53:24,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:24,261 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 240 transitions. [2021-06-05 21:53:24,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:24,261 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:24,261 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:24,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1299 [2021-06-05 21:53:24,461 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:24,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:24,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1177885978, now seen corresponding path program 222 times [2021-06-05 21:53:24,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:24,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558081755] [2021-06-05 21:53:24,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:24,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:24,604 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:24,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:24,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558081755] [2021-06-05 21:53:24,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558081755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:24,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103271564] [2021-06-05 21:53:24,604 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:24,629 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:53:24,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:24,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 21:53:24,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:24,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:24,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:24,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:24,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:24,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:24,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:53:24,835 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:24,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:24,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:53:24,841 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2021-06-05 21:53:24,877 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:24,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103271564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:24,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:24,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 21:53:24,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641924530] [2021-06-05 21:53:24,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:53:24,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:24,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:53:24,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:53:24,878 INFO L87 Difference]: Start difference. First operand 113 states and 240 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:25,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:25,089 INFO L93 Difference]: Finished difference Result 132 states and 272 transitions. [2021-06-05 21:53:25,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:53:25,089 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:25,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:25,089 INFO L225 Difference]: With dead ends: 132 [2021-06-05 21:53:25,089 INFO L226 Difference]: Without dead ends: 125 [2021-06-05 21:53:25,089 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 338.5ms TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:53:25,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-06-05 21:53:25,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 114. [2021-06-05 21:53:25,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.150442477876106) internal successors, (243), 113 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:25,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 243 transitions. [2021-06-05 21:53:25,091 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 243 transitions. Word has length 18 [2021-06-05 21:53:25,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:25,091 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 243 transitions. [2021-06-05 21:53:25,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:25,091 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 243 transitions. [2021-06-05 21:53:25,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:25,091 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:25,091 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:25,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1304,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:25,292 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:25,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:25,292 INFO L82 PathProgramCache]: Analyzing trace with hash -315880914, now seen corresponding path program 223 times [2021-06-05 21:53:25,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:25,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550225803] [2021-06-05 21:53:25,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:25,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:25,458 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:25,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:25,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550225803] [2021-06-05 21:53:25,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550225803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:25,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207011656] [2021-06-05 21:53:25,458 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:25,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:25,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:53:25,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:25,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:25,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:25,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:25,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:25,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:25,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:25,712 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:25,741 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-06-05 21:53:25,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:25,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:53:25,744 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:25,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:25,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:53:25,751 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 21:53:25,787 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:25,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207011656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:25,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:25,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 21:53:25,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821993622] [2021-06-05 21:53:25,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:53:25,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:25,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:53:25,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:53:25,788 INFO L87 Difference]: Start difference. First operand 114 states and 243 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:26,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:26,099 INFO L93 Difference]: Finished difference Result 142 states and 291 transitions. [2021-06-05 21:53:26,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:53:26,099 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:26,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:26,099 INFO L225 Difference]: With dead ends: 142 [2021-06-05 21:53:26,099 INFO L226 Difference]: Without dead ends: 129 [2021-06-05 21:53:26,100 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 448.4ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:53:26,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-06-05 21:53:26,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 115. [2021-06-05 21:53:26,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.1491228070175437) internal successors, (245), 114 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:26,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 245 transitions. [2021-06-05 21:53:26,101 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 245 transitions. Word has length 18 [2021-06-05 21:53:26,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:26,101 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 245 transitions. [2021-06-05 21:53:26,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:26,101 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 245 transitions. [2021-06-05 21:53:26,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:26,101 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:26,101 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:26,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1307 [2021-06-05 21:53:26,302 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:26,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:26,302 INFO L82 PathProgramCache]: Analyzing trace with hash 820304358, now seen corresponding path program 224 times [2021-06-05 21:53:26,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:26,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788174017] [2021-06-05 21:53:26,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:26,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:26,485 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:26,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:26,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788174017] [2021-06-05 21:53:26,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788174017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:26,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844401335] [2021-06-05 21:53:26,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:26,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:53:26,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:26,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:53:26,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:26,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:26,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:26,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:26,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:26,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:26,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:26,674 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:26,736 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-06-05 21:53:26,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:26,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:53:26,740 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:26,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:26,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:26,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:26,768 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:26,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:26,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:26,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:53:26,794 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:26,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:26,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:53:26,818 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 21:53:26,910 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:26,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844401335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:26,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:26,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 21:53:26,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420620318] [2021-06-05 21:53:26,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:53:26,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:26,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:53:26,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:53:26,911 INFO L87 Difference]: Start difference. First operand 115 states and 245 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:27,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:27,266 INFO L93 Difference]: Finished difference Result 163 states and 322 transitions. [2021-06-05 21:53:27,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:53:27,267 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:27,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:27,267 INFO L225 Difference]: With dead ends: 163 [2021-06-05 21:53:27,267 INFO L226 Difference]: Without dead ends: 144 [2021-06-05 21:53:27,267 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 530.7ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:53:27,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-06-05 21:53:27,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 114. [2021-06-05 21:53:27,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.150442477876106) internal successors, (243), 113 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:27,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 243 transitions. [2021-06-05 21:53:27,268 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 243 transitions. Word has length 18 [2021-06-05 21:53:27,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:27,268 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 243 transitions. [2021-06-05 21:53:27,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:27,269 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 243 transitions. [2021-06-05 21:53:27,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:27,269 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:27,269 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:27,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1311 [2021-06-05 21:53:27,469 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:27,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:27,469 INFO L82 PathProgramCache]: Analyzing trace with hash 578515942, now seen corresponding path program 225 times [2021-06-05 21:53:27,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:27,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763095254] [2021-06-05 21:53:27,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:27,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:27,619 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:27,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:27,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763095254] [2021-06-05 21:53:27,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763095254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:27,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481693369] [2021-06-05 21:53:27,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:27,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:53:27,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:27,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 21:53:27,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:27,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:27,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:27,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:27,801 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:27,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:27,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:27,804 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:27,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:27,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:27,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:27,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:53:27,825 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:27,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:27,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:53:27,829 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:27,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:27,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:53:27,847 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:67, output treesize:29 [2021-06-05 21:53:27,901 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:27,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481693369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:27,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:27,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:53:27,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916840522] [2021-06-05 21:53:27,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:53:27,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:27,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:53:27,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:53:27,902 INFO L87 Difference]: Start difference. First operand 114 states and 243 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:28,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:28,228 INFO L93 Difference]: Finished difference Result 138 states and 286 transitions. [2021-06-05 21:53:28,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:53:28,228 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:28,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:28,229 INFO L225 Difference]: With dead ends: 138 [2021-06-05 21:53:28,229 INFO L226 Difference]: Without dead ends: 122 [2021-06-05 21:53:28,229 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 387.9ms TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:53:28,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-06-05 21:53:28,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 116. [2021-06-05 21:53:28,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.1478260869565218) internal successors, (247), 115 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:28,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 247 transitions. [2021-06-05 21:53:28,230 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 247 transitions. Word has length 18 [2021-06-05 21:53:28,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:28,230 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 247 transitions. [2021-06-05 21:53:28,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:28,230 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 247 transitions. [2021-06-05 21:53:28,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:28,230 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:28,230 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:28,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1316 [2021-06-05 21:53:28,431 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:28,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:28,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1440521006, now seen corresponding path program 226 times [2021-06-05 21:53:28,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:28,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788972129] [2021-06-05 21:53:28,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:28,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:28,600 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:28,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:28,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788972129] [2021-06-05 21:53:28,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788972129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:28,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273228625] [2021-06-05 21:53:28,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:28,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:53:28,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:28,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:53:28,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:28,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:28,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:28,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:28,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:28,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:28,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:28,841 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:28,868 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-06-05 21:53:28,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:28,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:53:28,872 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:28,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:28,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:53:28,880 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 21:53:28,916 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:28,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273228625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:28,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:28,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 21:53:28,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016900898] [2021-06-05 21:53:28,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:53:28,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:28,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:53:28,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:53:28,916 INFO L87 Difference]: Start difference. First operand 116 states and 247 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:29,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:29,200 INFO L93 Difference]: Finished difference Result 135 states and 280 transitions. [2021-06-05 21:53:29,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:53:29,200 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:29,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:29,201 INFO L225 Difference]: With dead ends: 135 [2021-06-05 21:53:29,201 INFO L226 Difference]: Without dead ends: 122 [2021-06-05 21:53:29,201 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 442.3ms TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:53:29,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-06-05 21:53:29,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 117. [2021-06-05 21:53:29,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.146551724137931) internal successors, (249), 116 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:29,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 249 transitions. [2021-06-05 21:53:29,202 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 249 transitions. Word has length 18 [2021-06-05 21:53:29,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:29,202 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 249 transitions. [2021-06-05 21:53:29,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:29,202 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 249 transitions. [2021-06-05 21:53:29,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:29,202 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:29,202 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:29,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1322 [2021-06-05 21:53:29,403 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:29,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:29,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1718261018, now seen corresponding path program 227 times [2021-06-05 21:53:29,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:29,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002911192] [2021-06-05 21:53:29,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:29,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:29,601 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:29,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:29,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002911192] [2021-06-05 21:53:29,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002911192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:29,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107687935] [2021-06-05 21:53:29,602 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:29,662 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:53:29,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:29,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:53:29,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:29,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:29,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:29,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:29,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:29,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:29,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:29,821 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:29,883 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-06-05 21:53:29,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:29,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:53:29,887 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:29,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:29,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:29,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:29,915 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:29,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:29,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:29,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:53:29,941 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:29,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:29,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:53:29,963 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 21:53:30,047 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:30,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107687935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:30,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:30,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:53:30,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511820189] [2021-06-05 21:53:30,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:53:30,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:30,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:53:30,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:53:30,048 INFO L87 Difference]: Start difference. First operand 117 states and 249 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:30,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:30,286 INFO L93 Difference]: Finished difference Result 135 states and 278 transitions. [2021-06-05 21:53:30,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:53:30,287 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:30,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:30,287 INFO L225 Difference]: With dead ends: 135 [2021-06-05 21:53:30,287 INFO L226 Difference]: Without dead ends: 123 [2021-06-05 21:53:30,287 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 448.7ms TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:53:30,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-06-05 21:53:30,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 118. [2021-06-05 21:53:30,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.1452991452991452) internal successors, (251), 117 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:30,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 251 transitions. [2021-06-05 21:53:30,288 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 251 transitions. Word has length 18 [2021-06-05 21:53:30,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:30,288 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 251 transitions. [2021-06-05 21:53:30,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:30,288 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 251 transitions. [2021-06-05 21:53:30,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:30,288 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:30,289 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:30,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1326,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:30,489 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:30,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:30,489 INFO L82 PathProgramCache]: Analyzing trace with hash -666263114, now seen corresponding path program 228 times [2021-06-05 21:53:30,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:30,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958552783] [2021-06-05 21:53:30,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:30,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:30,642 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:30,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:30,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958552783] [2021-06-05 21:53:30,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958552783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:30,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098179568] [2021-06-05 21:53:30,643 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:30,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:53:30,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:30,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:53:30,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:30,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:30,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:30,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:53:30,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:30,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:30,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:53:30,828 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:30,849 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-06-05 21:53:30,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:30,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:53:30,852 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:30,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:30,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:53:30,859 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 21:53:30,896 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:30,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098179568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:30,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:30,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:53:30,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126339020] [2021-06-05 21:53:30,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:53:30,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:30,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:53:30,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:53:30,897 INFO L87 Difference]: Start difference. First operand 118 states and 251 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:31,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:31,190 INFO L93 Difference]: Finished difference Result 140 states and 290 transitions. [2021-06-05 21:53:31,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:53:31,191 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:31,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:31,191 INFO L225 Difference]: With dead ends: 140 [2021-06-05 21:53:31,191 INFO L226 Difference]: Without dead ends: 127 [2021-06-05 21:53:31,191 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 401.6ms TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:53:31,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-05 21:53:31,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 120. [2021-06-05 21:53:31,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.142857142857143) internal successors, (255), 119 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:31,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 255 transitions. [2021-06-05 21:53:31,192 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 255 transitions. Word has length 18 [2021-06-05 21:53:31,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:31,192 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 255 transitions. [2021-06-05 21:53:31,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:31,192 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 255 transitions. [2021-06-05 21:53:31,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:31,193 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:31,193 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:31,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1331 [2021-06-05 21:53:31,408 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:31,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:31,409 INFO L82 PathProgramCache]: Analyzing trace with hash 469922158, now seen corresponding path program 229 times [2021-06-05 21:53:31,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:31,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871374396] [2021-06-05 21:53:31,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:31,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:31,579 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:31,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:31,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871374396] [2021-06-05 21:53:31,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871374396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:31,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457619023] [2021-06-05 21:53:31,579 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:31,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:31,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:53:31,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:31,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:31,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:31,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:31,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:31,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:31,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:31,754 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:31,815 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-06-05 21:53:31,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:31,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:53:31,819 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:31,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:31,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:31,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:31,846 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:31,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:31,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:31,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:53:31,872 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:31,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:31,893 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:53:31,894 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 21:53:31,968 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:31,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457619023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:31,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:31,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:53:31,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004457820] [2021-06-05 21:53:31,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:53:31,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:31,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:53:31,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:53:31,968 INFO L87 Difference]: Start difference. First operand 120 states and 255 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:32,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:32,321 INFO L93 Difference]: Finished difference Result 138 states and 284 transitions. [2021-06-05 21:53:32,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:53:32,321 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:32,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:32,321 INFO L225 Difference]: With dead ends: 138 [2021-06-05 21:53:32,321 INFO L226 Difference]: Without dead ends: 126 [2021-06-05 21:53:32,321 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 444.1ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:53:32,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-05 21:53:32,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 119. [2021-06-05 21:53:32,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.1440677966101696) internal successors, (253), 118 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:32,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 253 transitions. [2021-06-05 21:53:32,323 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 253 transitions. Word has length 18 [2021-06-05 21:53:32,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:32,323 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 253 transitions. [2021-06-05 21:53:32,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:32,323 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 253 transitions. [2021-06-05 21:53:32,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:32,323 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:32,323 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:32,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1335 [2021-06-05 21:53:32,523 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:32,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:32,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1676248602, now seen corresponding path program 230 times [2021-06-05 21:53:32,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:32,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996667074] [2021-06-05 21:53:32,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:32,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:32,678 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:32,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:32,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996667074] [2021-06-05 21:53:32,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996667074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:32,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906164159] [2021-06-05 21:53:32,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:32,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:53:32,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:32,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 21:53:32,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:32,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:32,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:32,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:32,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:32,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:32,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:32,812 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:32,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:32,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:32,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:32,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:53:32,836 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:32,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:32,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:53:32,840 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:32,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:32,860 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:53:32,860 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 21:53:32,933 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:32,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906164159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:32,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:32,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:53:32,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173972478] [2021-06-05 21:53:32,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:53:32,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:32,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:53:32,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:53:32,934 INFO L87 Difference]: Start difference. First operand 119 states and 253 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:33,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:33,360 INFO L93 Difference]: Finished difference Result 147 states and 310 transitions. [2021-06-05 21:53:33,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:53:33,360 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:33,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:33,361 INFO L225 Difference]: With dead ends: 147 [2021-06-05 21:53:33,361 INFO L226 Difference]: Without dead ends: 138 [2021-06-05 21:53:33,361 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 475.7ms TimeCoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:53:33,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-06-05 21:53:33,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 120. [2021-06-05 21:53:33,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.1512605042016806) internal successors, (256), 119 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:33,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 256 transitions. [2021-06-05 21:53:33,362 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 256 transitions. Word has length 18 [2021-06-05 21:53:33,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:33,362 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 256 transitions. [2021-06-05 21:53:33,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:33,362 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 256 transitions. [2021-06-05 21:53:33,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:33,362 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:33,362 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:33,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1340,231 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:33,563 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:33,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:33,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1052962998, now seen corresponding path program 231 times [2021-06-05 21:53:33,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:33,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481871584] [2021-06-05 21:53:33,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:33,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:33,698 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:33,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:33,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481871584] [2021-06-05 21:53:33,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481871584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:33,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449149820] [2021-06-05 21:53:33,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:33,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:53:33,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:33,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 21:53:33,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:33,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:33,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:33,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:33,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:33,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:33,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:33,870 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:33,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:33,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:33,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:33,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:53:33,895 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:33,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:33,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:53:33,899 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:33,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:33,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:53:33,917 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:67, output treesize:29 [2021-06-05 21:53:33,967 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:33,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449149820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:33,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:33,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:53:33,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055997103] [2021-06-05 21:53:33,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:53:33,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:33,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:53:33,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:53:33,968 INFO L87 Difference]: Start difference. First operand 120 states and 256 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:34,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:34,290 INFO L93 Difference]: Finished difference Result 142 states and 295 transitions. [2021-06-05 21:53:34,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:53:34,291 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:34,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:34,291 INFO L225 Difference]: With dead ends: 142 [2021-06-05 21:53:34,291 INFO L226 Difference]: Without dead ends: 129 [2021-06-05 21:53:34,291 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 333.6ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:53:34,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-06-05 21:53:34,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2021-06-05 21:53:34,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.1463414634146343) internal successors, (264), 123 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:34,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 264 transitions. [2021-06-05 21:53:34,293 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 264 transitions. Word has length 18 [2021-06-05 21:53:34,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:34,293 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 264 transitions. [2021-06-05 21:53:34,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:34,293 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 264 transitions. [2021-06-05 21:53:34,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:34,293 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:34,293 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:34,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1343 [2021-06-05 21:53:34,493 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:34,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:34,494 INFO L82 PathProgramCache]: Analyzing trace with hash -2105819026, now seen corresponding path program 232 times [2021-06-05 21:53:34,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:34,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037193950] [2021-06-05 21:53:34,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:34,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:34,680 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:34,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:34,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037193950] [2021-06-05 21:53:34,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037193950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:34,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535060471] [2021-06-05 21:53:34,680 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:34,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:53:34,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:34,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:53:34,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:34,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:34,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:34,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:34,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:34,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:34,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:34,834 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:34,901 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-06-05 21:53:34,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:34,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:53:34,905 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:34,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:34,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:34,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:34,932 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:34,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:34,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:34,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:53:34,958 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:34,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:34,980 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:53:34,980 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 21:53:35,059 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:35,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535060471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:35,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:35,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:53:35,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475160741] [2021-06-05 21:53:35,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:53:35,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:35,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:53:35,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:53:35,060 INFO L87 Difference]: Start difference. First operand 124 states and 264 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:35,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:35,389 INFO L93 Difference]: Finished difference Result 162 states and 324 transitions. [2021-06-05 21:53:35,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:53:35,389 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:35,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:35,389 INFO L225 Difference]: With dead ends: 162 [2021-06-05 21:53:35,389 INFO L226 Difference]: Without dead ends: 143 [2021-06-05 21:53:35,390 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 470.4ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:53:35,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-06-05 21:53:35,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 123. [2021-06-05 21:53:35,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.1475409836065573) internal successors, (262), 122 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:35,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 262 transitions. [2021-06-05 21:53:35,391 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 262 transitions. Word has length 18 [2021-06-05 21:53:35,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:35,391 INFO L482 AbstractCegarLoop]: Abstraction has 123 states and 262 transitions. [2021-06-05 21:53:35,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:35,391 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 262 transitions. [2021-06-05 21:53:35,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:35,391 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:35,391 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:35,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1349 [2021-06-05 21:53:35,592 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:35,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:35,592 INFO L82 PathProgramCache]: Analyzing trace with hash 42977510, now seen corresponding path program 233 times [2021-06-05 21:53:35,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:35,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197940344] [2021-06-05 21:53:35,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:35,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:35,797 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:35,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:35,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197940344] [2021-06-05 21:53:35,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197940344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:35,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318835962] [2021-06-05 21:53:35,797 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:35,822 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:53:35,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:35,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:53:35,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:35,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:35,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:35,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:35,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:35,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:35,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:35,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:35,934 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:35,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:35,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:35,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:35,938 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:35,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:35,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:35,941 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:35,995 INFO L628 ElimStorePlain]: treesize reduction 77, result has 46.5 percent of original size [2021-06-05 21:53:35,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:35,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:35,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:53:35,999 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:36,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:36,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:53:36,003 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:36,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:36,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:53:36,028 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 21:53:36,105 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:36,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318835962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:36,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:36,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 21:53:36,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110594895] [2021-06-05 21:53:36,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:53:36,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:36,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:53:36,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:53:36,105 INFO L87 Difference]: Start difference. First operand 123 states and 262 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:36,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:36,468 INFO L93 Difference]: Finished difference Result 172 states and 349 transitions. [2021-06-05 21:53:36,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:53:36,468 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:36,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:36,469 INFO L225 Difference]: With dead ends: 172 [2021-06-05 21:53:36,469 INFO L226 Difference]: Without dead ends: 153 [2021-06-05 21:53:36,469 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 501.9ms TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:53:36,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-06-05 21:53:36,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 123. [2021-06-05 21:53:36,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.1475409836065573) internal successors, (262), 122 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:36,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 262 transitions. [2021-06-05 21:53:36,470 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 262 transitions. Word has length 18 [2021-06-05 21:53:36,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:36,470 INFO L482 AbstractCegarLoop]: Abstraction has 123 states and 262 transitions. [2021-06-05 21:53:36,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:36,470 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 262 transitions. [2021-06-05 21:53:36,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:36,471 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:36,471 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:36,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1354 [2021-06-05 21:53:36,671 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:36,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:36,671 INFO L82 PathProgramCache]: Analyzing trace with hash -2063806610, now seen corresponding path program 234 times [2021-06-05 21:53:36,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:36,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001071048] [2021-06-05 21:53:36,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:36,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:36,913 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:36,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:36,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001071048] [2021-06-05 21:53:36,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001071048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:36,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523665979] [2021-06-05 21:53:36,913 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:36,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:53:36,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:36,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 21:53:36,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:37,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:37,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:37,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:37,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:37,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:37,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:37,068 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:37,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:37,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:37,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:37,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:53:37,095 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:37,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:37,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:53:37,098 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:37,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:37,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:53:37,121 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 21:53:37,210 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:37,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523665979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:37,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:37,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:53:37,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747796168] [2021-06-05 21:53:37,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:53:37,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:37,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:53:37,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:53:37,211 INFO L87 Difference]: Start difference. First operand 123 states and 262 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:37,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:37,530 INFO L93 Difference]: Finished difference Result 153 states and 315 transitions. [2021-06-05 21:53:37,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:53:37,530 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:37,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:37,530 INFO L225 Difference]: With dead ends: 153 [2021-06-05 21:53:37,530 INFO L226 Difference]: Without dead ends: 139 [2021-06-05 21:53:37,531 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 540.7ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:53:37,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-06-05 21:53:37,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 126. [2021-06-05 21:53:37,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.176) internal successors, (272), 125 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:37,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 272 transitions. [2021-06-05 21:53:37,532 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 272 transitions. Word has length 18 [2021-06-05 21:53:37,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:37,532 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 272 transitions. [2021-06-05 21:53:37,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:37,532 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 272 transitions. [2021-06-05 21:53:37,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:37,532 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:37,532 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:37,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1357 [2021-06-05 21:53:37,733 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:37,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:37,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1345362406, now seen corresponding path program 235 times [2021-06-05 21:53:37,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:37,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848242422] [2021-06-05 21:53:37,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:37,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:37,951 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:37,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:37,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848242422] [2021-06-05 21:53:37,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848242422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:37,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411420580] [2021-06-05 21:53:37,952 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:37,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:37,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:53:37,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:38,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:38,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:38,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:38,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:38,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:38,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:38,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:38,140 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:38,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:38,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:38,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:38,144 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:38,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:38,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:38,148 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:38,216 INFO L628 ElimStorePlain]: treesize reduction 77, result has 46.5 percent of original size [2021-06-05 21:53:38,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:38,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:38,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:53:38,225 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:38,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:38,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:53:38,229 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:38,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:38,259 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:53:38,259 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 21:53:38,379 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:38,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411420580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:38,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:38,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 21:53:38,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94092105] [2021-06-05 21:53:38,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:53:38,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:38,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:53:38,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:53:38,380 INFO L87 Difference]: Start difference. First operand 126 states and 272 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:38,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:38,686 INFO L93 Difference]: Finished difference Result 157 states and 332 transitions. [2021-06-05 21:53:38,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:53:38,687 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:38,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:38,687 INFO L225 Difference]: With dead ends: 157 [2021-06-05 21:53:38,687 INFO L226 Difference]: Without dead ends: 145 [2021-06-05 21:53:38,687 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 479.1ms TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:53:38,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-05 21:53:38,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 131. [2021-06-05 21:53:38,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.1846153846153844) internal successors, (284), 130 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:38,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 284 transitions. [2021-06-05 21:53:38,688 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 284 transitions. Word has length 18 [2021-06-05 21:53:38,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:38,688 INFO L482 AbstractCegarLoop]: Abstraction has 131 states and 284 transitions. [2021-06-05 21:53:38,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:38,689 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 284 transitions. [2021-06-05 21:53:38,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:38,689 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:38,689 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:38,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1362,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:38,889 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:38,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:38,890 INFO L82 PathProgramCache]: Analyzing trace with hash -726850258, now seen corresponding path program 236 times [2021-06-05 21:53:38,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:38,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410533028] [2021-06-05 21:53:38,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:38,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:39,072 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:39,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:39,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410533028] [2021-06-05 21:53:39,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410533028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:39,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660111583] [2021-06-05 21:53:39,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:39,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:53:39,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:39,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:53:39,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:39,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:39,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:39,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:53:39,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:39,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:39,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:53:39,243 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:39,265 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-06-05 21:53:39,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:39,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:53:39,269 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:39,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:39,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:53:39,276 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 21:53:39,316 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:39,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660111583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:39,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:39,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:53:39,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478579608] [2021-06-05 21:53:39,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:53:39,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:39,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:53:39,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:53:39,317 INFO L87 Difference]: Start difference. First operand 131 states and 284 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:39,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:39,495 INFO L93 Difference]: Finished difference Result 154 states and 320 transitions. [2021-06-05 21:53:39,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:53:39,495 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:39,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:39,496 INFO L225 Difference]: With dead ends: 154 [2021-06-05 21:53:39,496 INFO L226 Difference]: Without dead ends: 135 [2021-06-05 21:53:39,496 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 339.4ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:53:39,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-06-05 21:53:39,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2021-06-05 21:53:39,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.183206106870229) internal successors, (286), 131 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:39,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 286 transitions. [2021-06-05 21:53:39,497 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 286 transitions. Word has length 18 [2021-06-05 21:53:39,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:39,497 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 286 transitions. [2021-06-05 21:53:39,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:39,497 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 286 transitions. [2021-06-05 21:53:39,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:39,498 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:39,498 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:39,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1365 [2021-06-05 21:53:39,713 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:39,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:39,713 INFO L82 PathProgramCache]: Analyzing trace with hash 225502950, now seen corresponding path program 237 times [2021-06-05 21:53:39,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:39,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263574294] [2021-06-05 21:53:39,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:39,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:39,884 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:39,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:39,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263574294] [2021-06-05 21:53:39,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263574294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:39,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990631807] [2021-06-05 21:53:39,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:39,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:53:39,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:39,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:53:39,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:40,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:40,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:40,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:53:40,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:40,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:40,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:53:40,068 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:40,090 INFO L628 ElimStorePlain]: treesize reduction 36, result has 47.8 percent of original size [2021-06-05 21:53:40,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:40,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 21:53:40,093 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:40,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:40,100 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:53:40,100 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 21:53:40,146 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:40,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990631807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:40,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:40,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:53:40,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262771958] [2021-06-05 21:53:40,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:53:40,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:40,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:53:40,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:53:40,147 INFO L87 Difference]: Start difference. First operand 132 states and 286 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:40,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:40,329 INFO L93 Difference]: Finished difference Result 152 states and 317 transitions. [2021-06-05 21:53:40,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:53:40,329 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:40,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:40,329 INFO L225 Difference]: With dead ends: 152 [2021-06-05 21:53:40,329 INFO L226 Difference]: Without dead ends: 136 [2021-06-05 21:53:40,330 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 380.1ms TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:53:40,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-06-05 21:53:40,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 133. [2021-06-05 21:53:40,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.1818181818181817) internal successors, (288), 132 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:40,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 288 transitions. [2021-06-05 21:53:40,331 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 288 transitions. Word has length 18 [2021-06-05 21:53:40,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:40,331 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 288 transitions. [2021-06-05 21:53:40,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:40,331 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 288 transitions. [2021-06-05 21:53:40,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:40,331 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:40,331 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:40,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1366,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:40,532 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:40,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:40,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1087508014, now seen corresponding path program 238 times [2021-06-05 21:53:40,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:40,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844110272] [2021-06-05 21:53:40,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:40,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:40,713 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:40,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:40,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844110272] [2021-06-05 21:53:40,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844110272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:40,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702184389] [2021-06-05 21:53:40,714 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:40,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:53:40,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:40,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:53:40,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:40,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:40,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:40,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:53:40,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:40,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:40,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:53:40,901 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:40,923 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-06-05 21:53:40,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:40,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:53:40,926 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:40,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:40,933 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:53:40,933 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 21:53:40,973 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:40,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702184389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:40,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:40,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:53:40,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594263700] [2021-06-05 21:53:40,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:53:40,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:40,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:53:40,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:53:40,974 INFO L87 Difference]: Start difference. First operand 133 states and 288 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:41,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:41,291 INFO L93 Difference]: Finished difference Result 154 states and 325 transitions. [2021-06-05 21:53:41,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:53:41,292 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:41,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:41,292 INFO L225 Difference]: With dead ends: 154 [2021-06-05 21:53:41,292 INFO L226 Difference]: Without dead ends: 141 [2021-06-05 21:53:41,292 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 450.2ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:53:41,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-06-05 21:53:41,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 134. [2021-06-05 21:53:41,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.180451127819549) internal successors, (290), 133 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:41,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 290 transitions. [2021-06-05 21:53:41,293 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 290 transitions. Word has length 18 [2021-06-05 21:53:41,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:41,293 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 290 transitions. [2021-06-05 21:53:41,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:41,293 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 290 transitions. [2021-06-05 21:53:41,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:41,294 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:41,294 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:41,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1367 [2021-06-05 21:53:41,494 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:41,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:41,494 INFO L82 PathProgramCache]: Analyzing trace with hash -2071274010, now seen corresponding path program 239 times [2021-06-05 21:53:41,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:41,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075109124] [2021-06-05 21:53:41,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:41,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:41,709 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:41,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:41,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075109124] [2021-06-05 21:53:41,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075109124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:41,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943755913] [2021-06-05 21:53:41,709 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:41,745 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:53:41,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:41,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:53:41,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:41,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:41,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:41,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:41,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:41,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:41,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:41,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:41,883 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:41,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:41,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:41,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:41,887 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:41,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:41,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:41,890 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:41,943 INFO L628 ElimStorePlain]: treesize reduction 77, result has 46.5 percent of original size [2021-06-05 21:53:41,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:41,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:41,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:53:41,947 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:41,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:41,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:53:41,951 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:41,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:41,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:53:41,975 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 21:53:42,057 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:42,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943755913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:42,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:42,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:53:42,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262563443] [2021-06-05 21:53:42,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:53:42,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:42,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:53:42,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:53:42,058 INFO L87 Difference]: Start difference. First operand 134 states and 290 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:42,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:42,427 INFO L93 Difference]: Finished difference Result 175 states and 356 transitions. [2021-06-05 21:53:42,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:53:42,427 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:42,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:42,428 INFO L225 Difference]: With dead ends: 175 [2021-06-05 21:53:42,428 INFO L226 Difference]: Without dead ends: 156 [2021-06-05 21:53:42,428 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 547.1ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:53:42,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-05 21:53:42,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 132. [2021-06-05 21:53:42,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.183206106870229) internal successors, (286), 131 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:42,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 286 transitions. [2021-06-05 21:53:42,429 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 286 transitions. Word has length 18 [2021-06-05 21:53:42,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:42,429 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 286 transitions. [2021-06-05 21:53:42,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:42,429 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 286 transitions. [2021-06-05 21:53:42,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:42,429 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:42,429 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:42,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1368 [2021-06-05 21:53:42,630 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:42,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:42,630 INFO L82 PathProgramCache]: Analyzing trace with hash -660295330, now seen corresponding path program 240 times [2021-06-05 21:53:42,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:42,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112299949] [2021-06-05 21:53:42,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:42,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:42,801 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:42,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:42,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112299949] [2021-06-05 21:53:42,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112299949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:42,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487868974] [2021-06-05 21:53:42,801 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:42,847 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:53:42,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:42,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 21:53:42,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:42,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:42,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:53:42,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:42,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:42,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:42,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 21:53:42,995 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:43,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:43,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:53:43,002 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-06-05 21:53:43,039 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:43,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487868974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:43,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:43,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:53:43,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244705088] [2021-06-05 21:53:43,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:53:43,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:43,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:53:43,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:53:43,040 INFO L87 Difference]: Start difference. First operand 132 states and 286 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:43,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:43,267 INFO L93 Difference]: Finished difference Result 153 states and 322 transitions. [2021-06-05 21:53:43,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:53:43,268 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:43,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:43,268 INFO L225 Difference]: With dead ends: 153 [2021-06-05 21:53:43,268 INFO L226 Difference]: Without dead ends: 146 [2021-06-05 21:53:43,268 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 356.4ms TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:53:43,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-05 21:53:43,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 134. [2021-06-05 21:53:43,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.18796992481203) internal successors, (291), 133 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:43,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 291 transitions. [2021-06-05 21:53:43,269 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 291 transitions. Word has length 18 [2021-06-05 21:53:43,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:43,269 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 291 transitions. [2021-06-05 21:53:43,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:43,270 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 291 transitions. [2021-06-05 21:53:43,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:43,270 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:43,270 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:43,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1371,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:43,485 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:43,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:43,486 INFO L82 PathProgramCache]: Analyzing trace with hash 201709734, now seen corresponding path program 241 times [2021-06-05 21:53:43,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:43,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287857234] [2021-06-05 21:53:43,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:43,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:43,646 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:43,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:43,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287857234] [2021-06-05 21:53:43,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287857234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:43,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387533528] [2021-06-05 21:53:43,646 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:43,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:43,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:53:43,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:43,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:43,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:43,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:53:43,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:43,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:43,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:53:43,824 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:43,845 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-06-05 21:53:43,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:43,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:53:43,849 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:43,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:43,857 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:53:43,857 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 21:53:43,892 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:43,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387533528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:43,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:43,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 21:53:43,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245057793] [2021-06-05 21:53:43,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:53:43,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:43,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:53:43,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:53:43,893 INFO L87 Difference]: Start difference. First operand 134 states and 291 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:44,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:44,177 INFO L93 Difference]: Finished difference Result 163 states and 341 transitions. [2021-06-05 21:53:44,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:53:44,178 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:44,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:44,178 INFO L225 Difference]: With dead ends: 163 [2021-06-05 21:53:44,178 INFO L226 Difference]: Without dead ends: 150 [2021-06-05 21:53:44,178 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 423.0ms TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:53:44,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-06-05 21:53:44,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 135. [2021-06-05 21:53:44,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.1865671641791047) internal successors, (293), 134 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:44,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 293 transitions. [2021-06-05 21:53:44,179 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 293 transitions. Word has length 18 [2021-06-05 21:53:44,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:44,180 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 293 transitions. [2021-06-05 21:53:44,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:44,180 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 293 transitions. [2021-06-05 21:53:44,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:44,180 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:44,180 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:44,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1372,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:44,380 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:44,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:44,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1337895006, now seen corresponding path program 242 times [2021-06-05 21:53:44,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:44,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779003173] [2021-06-05 21:53:44,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:44,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:44,552 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:44,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:44,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779003173] [2021-06-05 21:53:44,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779003173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:44,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980857344] [2021-06-05 21:53:44,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:44,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:53:44,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:44,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:53:44,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:44,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:44,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:44,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:44,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:44,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:44,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:44,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:44,712 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:44,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:44,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:44,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:44,716 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:44,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:44,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:44,719 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:44,772 INFO L628 ElimStorePlain]: treesize reduction 77, result has 46.5 percent of original size [2021-06-05 21:53:44,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:44,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:44,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:53:44,776 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:44,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:44,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:53:44,780 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:44,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:44,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:53:44,803 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 21:53:44,876 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:44,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980857344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:44,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:44,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 21:53:44,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991667310] [2021-06-05 21:53:44,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:53:44,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:44,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:53:44,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:53:44,877 INFO L87 Difference]: Start difference. First operand 135 states and 293 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:45,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:45,246 INFO L93 Difference]: Finished difference Result 184 states and 372 transitions. [2021-06-05 21:53:45,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:53:45,246 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:45,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:45,246 INFO L225 Difference]: With dead ends: 184 [2021-06-05 21:53:45,247 INFO L226 Difference]: Without dead ends: 165 [2021-06-05 21:53:45,247 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 500.3ms TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:53:45,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-06-05 21:53:45,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 133. [2021-06-05 21:53:45,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.1818181818181817) internal successors, (288), 132 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:45,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 288 transitions. [2021-06-05 21:53:45,248 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 288 transitions. Word has length 18 [2021-06-05 21:53:45,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:45,248 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 288 transitions. [2021-06-05 21:53:45,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:45,248 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 288 transitions. [2021-06-05 21:53:45,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:45,248 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:45,248 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:45,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1373,243 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:45,449 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:45,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:45,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1905074386, now seen corresponding path program 243 times [2021-06-05 21:53:45,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:45,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58283384] [2021-06-05 21:53:45,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:45,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:45,605 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:45,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:45,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58283384] [2021-06-05 21:53:45,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58283384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:45,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593224784] [2021-06-05 21:53:45,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:45,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:53:45,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:45,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:53:45,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:45,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:45,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:45,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:53:45,757 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:45,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:45,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:53:45,760 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:45,783 INFO L628 ElimStorePlain]: treesize reduction 42, result has 44.0 percent of original size [2021-06-05 21:53:45,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:45,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 21:53:45,786 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:45,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:45,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:53:45,793 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 21:53:45,827 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:45,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593224784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:45,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:45,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 21:53:45,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850026471] [2021-06-05 21:53:45,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:53:45,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:45,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:53:45,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:53:45,827 INFO L87 Difference]: Start difference. First operand 133 states and 288 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:46,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:46,114 INFO L93 Difference]: Finished difference Result 156 states and 329 transitions. [2021-06-05 21:53:46,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:53:46,114 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:46,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:46,115 INFO L225 Difference]: With dead ends: 156 [2021-06-05 21:53:46,115 INFO L226 Difference]: Without dead ends: 143 [2021-06-05 21:53:46,115 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 340.8ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:53:46,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-06-05 21:53:46,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 135. [2021-06-05 21:53:46,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.1791044776119404) internal successors, (292), 134 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:46,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 292 transitions. [2021-06-05 21:53:46,118 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 292 transitions. Word has length 18 [2021-06-05 21:53:46,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:46,118 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 292 transitions. [2021-06-05 21:53:46,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:46,118 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 292 transitions. [2021-06-05 21:53:46,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:46,118 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:46,119 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:46,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1376 [2021-06-05 21:53:46,319 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:46,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:46,319 INFO L82 PathProgramCache]: Analyzing trace with hash -768889114, now seen corresponding path program 244 times [2021-06-05 21:53:46,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:46,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299283073] [2021-06-05 21:53:46,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:46,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:46,486 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:46,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:46,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299283073] [2021-06-05 21:53:46,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299283073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:46,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168476200] [2021-06-05 21:53:46,487 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:46,511 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:53:46,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:46,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:53:46,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:46,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:46,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:46,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:46,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:46,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:46,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:46,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:46,619 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:46,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:46,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:46,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:46,623 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:46,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:46,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:46,626 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:46,680 INFO L628 ElimStorePlain]: treesize reduction 90, result has 38.8 percent of original size [2021-06-05 21:53:46,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:46,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:53:46,684 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:46,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:46,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:53:46,708 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:173, output treesize:36 [2021-06-05 21:53:46,778 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:46,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168476200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:46,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:46,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 21:53:46,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440267130] [2021-06-05 21:53:46,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:53:46,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:46,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:53:46,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:53:46,779 INFO L87 Difference]: Start difference. First operand 135 states and 292 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:47,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:47,128 INFO L93 Difference]: Finished difference Result 176 states and 358 transitions. [2021-06-05 21:53:47,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:53:47,129 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:47,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:47,129 INFO L225 Difference]: With dead ends: 176 [2021-06-05 21:53:47,129 INFO L226 Difference]: Without dead ends: 157 [2021-06-05 21:53:47,129 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 442.4ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:53:47,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-06-05 21:53:47,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 134. [2021-06-05 21:53:47,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.180451127819549) internal successors, (290), 133 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:47,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 290 transitions. [2021-06-05 21:53:47,130 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 290 transitions. Word has length 18 [2021-06-05 21:53:47,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:47,131 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 290 transitions. [2021-06-05 21:53:47,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:47,131 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 290 transitions. [2021-06-05 21:53:47,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:47,131 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:47,131 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:47,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1377 [2021-06-05 21:53:47,333 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:47,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:47,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1379907422, now seen corresponding path program 245 times [2021-06-05 21:53:47,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:47,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895827660] [2021-06-05 21:53:47,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:47,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:47,486 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:47,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:47,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895827660] [2021-06-05 21:53:47,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895827660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:47,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765056627] [2021-06-05 21:53:47,487 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:47,512 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:53:47,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:47,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:53:47,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:47,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:47,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:47,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:47,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:47,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:47,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:47,636 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:47,698 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-06-05 21:53:47,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:47,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:53:47,702 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:47,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:47,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:47,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:47,729 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:47,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:47,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:47,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:53:47,755 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:47,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:47,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:53:47,777 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 21:53:47,852 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:47,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765056627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:47,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:47,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:53:47,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505298419] [2021-06-05 21:53:47,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:53:47,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:47,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:53:47,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:53:47,853 INFO L87 Difference]: Start difference. First operand 134 states and 290 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:48,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:48,101 INFO L93 Difference]: Finished difference Result 173 states and 361 transitions. [2021-06-05 21:53:48,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:53:48,101 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:48,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:48,101 INFO L225 Difference]: With dead ends: 173 [2021-06-05 21:53:48,101 INFO L226 Difference]: Without dead ends: 154 [2021-06-05 21:53:48,102 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 348.2ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:53:48,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-05 21:53:48,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 136. [2021-06-05 21:53:48,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.185185185185185) internal successors, (295), 135 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:48,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 295 transitions. [2021-06-05 21:53:48,103 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 295 transitions. Word has length 18 [2021-06-05 21:53:48,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:48,103 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 295 transitions. [2021-06-05 21:53:48,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:48,103 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 295 transitions. [2021-06-05 21:53:48,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:48,103 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:48,103 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:48,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1380,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:48,304 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:48,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:48,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1944729062, now seen corresponding path program 246 times [2021-06-05 21:53:48,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:48,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705544335] [2021-06-05 21:53:48,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:48,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:48,437 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:48,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:48,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705544335] [2021-06-05 21:53:48,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705544335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:48,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140421896] [2021-06-05 21:53:48,437 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:48,462 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:53:48,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:48,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 21:53:48,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:48,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:48,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:53:48,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:48,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:48,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:48,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 21:53:48,605 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:48,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:48,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:53:48,611 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-06-05 21:53:48,647 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:48,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140421896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:48,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:48,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:53:48,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973846863] [2021-06-05 21:53:48,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:53:48,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:48,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:53:48,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:53:48,648 INFO L87 Difference]: Start difference. First operand 136 states and 295 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:48,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:48,846 INFO L93 Difference]: Finished difference Result 158 states and 333 transitions. [2021-06-05 21:53:48,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:53:48,847 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:48,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:48,847 INFO L225 Difference]: With dead ends: 158 [2021-06-05 21:53:48,847 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 21:53:48,847 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 316.2ms TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:53:48,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 21:53:48,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 139. [2021-06-05 21:53:48,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.1884057971014492) internal successors, (302), 138 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:48,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 302 transitions. [2021-06-05 21:53:48,848 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 302 transitions. Word has length 18 [2021-06-05 21:53:48,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:48,848 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 302 transitions. [2021-06-05 21:53:48,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:48,849 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 302 transitions. [2021-06-05 21:53:48,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:48,849 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:48,849 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:49,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1385 [2021-06-05 21:53:49,049 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:49,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:49,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1488233170, now seen corresponding path program 247 times [2021-06-05 21:53:49,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:49,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813365458] [2021-06-05 21:53:49,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:49,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:49,207 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:49,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:49,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813365458] [2021-06-05 21:53:49,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813365458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:49,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684038487] [2021-06-05 21:53:49,208 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:49,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:49,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:53:49,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:49,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:49,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:49,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:53:49,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:49,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:49,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:53:49,378 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:49,400 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-06-05 21:53:49,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:49,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:53:49,403 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:49,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:49,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:53:49,411 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 21:53:49,449 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:49,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684038487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:49,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:49,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:53:49,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438184642] [2021-06-05 21:53:49,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:53:49,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:49,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:53:49,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:53:49,450 INFO L87 Difference]: Start difference. First operand 139 states and 302 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:49,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:49,787 INFO L93 Difference]: Finished difference Result 168 states and 352 transitions. [2021-06-05 21:53:49,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:53:49,787 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:49,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:49,787 INFO L225 Difference]: With dead ends: 168 [2021-06-05 21:53:49,787 INFO L226 Difference]: Without dead ends: 155 [2021-06-05 21:53:49,787 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 439.2ms TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:53:49,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-06-05 21:53:49,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 140. [2021-06-05 21:53:49,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.1870503597122304) internal successors, (304), 139 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:49,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 304 transitions. [2021-06-05 21:53:49,789 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 304 transitions. Word has length 18 [2021-06-05 21:53:49,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:49,789 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 304 transitions. [2021-06-05 21:53:49,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:49,789 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 304 transitions. [2021-06-05 21:53:49,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:49,789 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:49,789 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:49,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 248 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1386 [2021-06-05 21:53:49,990 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:49,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:49,990 INFO L82 PathProgramCache]: Analyzing trace with hash -352047898, now seen corresponding path program 248 times [2021-06-05 21:53:49,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:49,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268887499] [2021-06-05 21:53:49,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:49,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:50,157 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:50,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:50,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268887499] [2021-06-05 21:53:50,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268887499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:50,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589656127] [2021-06-05 21:53:50,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:50,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:53:50,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:50,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:53:50,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:50,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:50,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:50,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:50,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:50,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:50,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:50,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:50,303 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:50,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:50,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:50,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:50,307 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:50,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:50,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:50,311 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:50,364 INFO L628 ElimStorePlain]: treesize reduction 77, result has 46.5 percent of original size [2021-06-05 21:53:50,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:50,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:50,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:53:50,368 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:50,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:50,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:53:50,372 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:50,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:50,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:53:50,395 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 21:53:50,468 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:50,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589656127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:50,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:50,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 21:53:50,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382342313] [2021-06-05 21:53:50,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:53:50,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:50,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:53:50,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:53:50,468 INFO L87 Difference]: Start difference. First operand 140 states and 304 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:50,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:50,924 INFO L93 Difference]: Finished difference Result 188 states and 381 transitions. [2021-06-05 21:53:50,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:53:50,924 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:50,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:50,925 INFO L225 Difference]: With dead ends: 188 [2021-06-05 21:53:50,925 INFO L226 Difference]: Without dead ends: 169 [2021-06-05 21:53:50,925 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 520.3ms TimeCoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:53:50,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-06-05 21:53:50,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 138. [2021-06-05 21:53:50,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.1824817518248176) internal successors, (299), 137 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:50,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 299 transitions. [2021-06-05 21:53:50,926 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 299 transitions. Word has length 18 [2021-06-05 21:53:50,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:50,926 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 299 transitions. [2021-06-05 21:53:50,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:50,926 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 299 transitions. [2021-06-05 21:53:50,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:50,926 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:50,926 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:51,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1387 [2021-06-05 21:53:51,127 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:51,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:51,127 INFO L82 PathProgramCache]: Analyzing trace with hash 699950006, now seen corresponding path program 249 times [2021-06-05 21:53:51,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:51,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623569387] [2021-06-05 21:53:51,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:51,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:51,290 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:51,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:51,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623569387] [2021-06-05 21:53:51,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623569387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:51,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824136936] [2021-06-05 21:53:51,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:51,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:53:51,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:51,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:53:51,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:51,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:51,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:51,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:53:51,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:51,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:51,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:53:51,442 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:51,464 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-06-05 21:53:51,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:51,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:53:51,467 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:51,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:51,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:53:51,475 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 21:53:51,508 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:51,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824136936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:51,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:51,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 21:53:51,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269646929] [2021-06-05 21:53:51,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:53:51,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:51,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:53:51,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:53:51,509 INFO L87 Difference]: Start difference. First operand 138 states and 299 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:51,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:51,757 INFO L93 Difference]: Finished difference Result 159 states and 336 transitions. [2021-06-05 21:53:51,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:53:51,757 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:51,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:51,758 INFO L225 Difference]: With dead ends: 159 [2021-06-05 21:53:51,758 INFO L226 Difference]: Without dead ends: 146 [2021-06-05 21:53:51,758 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 372.1ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:53:51,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-05 21:53:51,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 140. [2021-06-05 21:53:51,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.179856115107914) internal successors, (303), 139 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:51,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 303 transitions. [2021-06-05 21:53:51,759 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 303 transitions. Word has length 18 [2021-06-05 21:53:51,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:51,759 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 303 transitions. [2021-06-05 21:53:51,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:51,759 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 303 transitions. [2021-06-05 21:53:51,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:51,760 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:51,760 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:51,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1390 [2021-06-05 21:53:51,977 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:51,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:51,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1836135278, now seen corresponding path program 250 times [2021-06-05 21:53:51,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:51,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574591230] [2021-06-05 21:53:51,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:51,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:52,112 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:52,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:52,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574591230] [2021-06-05 21:53:52,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574591230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:52,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239529878] [2021-06-05 21:53:52,112 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:52,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:53:52,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:52,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:53:52,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:52,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:52,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:52,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:52,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:52,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:52,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:52,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:52,244 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:52,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:52,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:52,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:52,247 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:52,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:52,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:52,251 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:52,305 INFO L628 ElimStorePlain]: treesize reduction 83, result has 45.8 percent of original size [2021-06-05 21:53:52,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:52,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:52,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:53:52,309 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:52,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:52,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:53:52,313 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:52,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:52,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:53:52,337 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 21:53:52,404 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:52,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239529878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:52,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:52,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 21:53:52,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127149753] [2021-06-05 21:53:52,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:53:52,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:52,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:53:52,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:53:52,405 INFO L87 Difference]: Start difference. First operand 140 states and 303 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:52,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:52,680 INFO L93 Difference]: Finished difference Result 156 states and 328 transitions. [2021-06-05 21:53:52,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:53:52,682 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:52,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:52,682 INFO L225 Difference]: With dead ends: 156 [2021-06-05 21:53:52,682 INFO L226 Difference]: Without dead ends: 144 [2021-06-05 21:53:52,682 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 382.4ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:53:52,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-06-05 21:53:52,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 139. [2021-06-05 21:53:52,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.181159420289855) internal successors, (301), 138 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:52,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 301 transitions. [2021-06-05 21:53:52,683 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 301 transitions. Word has length 18 [2021-06-05 21:53:52,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:52,683 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 301 transitions. [2021-06-05 21:53:52,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:52,683 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 301 transitions. [2021-06-05 21:53:52,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:52,684 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:52,684 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:52,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1391,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:52,889 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:52,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:52,889 INFO L82 PathProgramCache]: Analyzing trace with hash -310035482, now seen corresponding path program 251 times [2021-06-05 21:53:52,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:52,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369537796] [2021-06-05 21:53:52,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:52,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:53,033 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:53,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:53,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369537796] [2021-06-05 21:53:53,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369537796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:53,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453779129] [2021-06-05 21:53:53,033 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:53,058 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:53:53,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:53,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:53:53,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:53,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:53,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:53,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:53,174 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:53,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:53,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:53,177 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:53,238 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-06-05 21:53:53,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:53,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:53,241 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:53,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:53,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:53,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:53:53,267 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:53,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:53,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:53,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:53:53,293 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:53,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:53,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:53:53,314 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 21:53:53,389 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:53,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453779129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:53,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:53,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:53:53,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667076759] [2021-06-05 21:53:53,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:53:53,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:53,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:53:53,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:53:53,390 INFO L87 Difference]: Start difference. First operand 139 states and 301 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:53,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:53,639 INFO L93 Difference]: Finished difference Result 169 states and 359 transitions. [2021-06-05 21:53:53,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:53:53,640 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:53,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:53,640 INFO L225 Difference]: With dead ends: 169 [2021-06-05 21:53:53,640 INFO L226 Difference]: Without dead ends: 157 [2021-06-05 21:53:53,640 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 338.5ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:53:53,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-06-05 21:53:53,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 139. [2021-06-05 21:53:53,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.181159420289855) internal successors, (301), 138 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:53,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 301 transitions. [2021-06-05 21:53:53,642 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 301 transitions. Word has length 18 [2021-06-05 21:53:53,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:53,642 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 301 transitions. [2021-06-05 21:53:53,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:53,642 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 301 transitions. [2021-06-05 21:53:53,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:53,642 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:53,642 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:53,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1394,252 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:53,842 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:53,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:53,843 INFO L82 PathProgramCache]: Analyzing trace with hash -185848274, now seen corresponding path program 252 times [2021-06-05 21:53:53,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:53,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141716932] [2021-06-05 21:53:53,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:53,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:54,004 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:54,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:54,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141716932] [2021-06-05 21:53:54,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141716932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:54,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342778048] [2021-06-05 21:53:54,004 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:54,031 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:53:54,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:54,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 21:53:54,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:54,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:54,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:53:54,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:54,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:54,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:54,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:53:54,163 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:54,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:54,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:53:54,170 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-06-05 21:53:54,205 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:54,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342778048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:54,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:54,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:53:54,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697699817] [2021-06-05 21:53:54,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:53:54,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:54,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:53:54,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:53:54,206 INFO L87 Difference]: Start difference. First operand 139 states and 301 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:54,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:54,521 INFO L93 Difference]: Finished difference Result 164 states and 349 transitions. [2021-06-05 21:53:54,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:53:54,521 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:54,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:54,521 INFO L225 Difference]: With dead ends: 164 [2021-06-05 21:53:54,521 INFO L226 Difference]: Without dead ends: 157 [2021-06-05 21:53:54,522 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 363.3ms TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:53:54,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-06-05 21:53:54,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 142. [2021-06-05 21:53:54,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.1843971631205674) internal successors, (308), 141 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:54,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 308 transitions. [2021-06-05 21:53:54,523 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 308 transitions. Word has length 18 [2021-06-05 21:53:54,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:54,523 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 308 transitions. [2021-06-05 21:53:54,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:54,523 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 308 transitions. [2021-06-05 21:53:54,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:54,523 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:54,523 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:54,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1399 [2021-06-05 21:53:54,737 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:54,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:54,737 INFO L82 PathProgramCache]: Analyzing trace with hash 950336998, now seen corresponding path program 253 times [2021-06-05 21:53:54,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:54,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498401836] [2021-06-05 21:53:54,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:54,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:54,917 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:54,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:54,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498401836] [2021-06-05 21:53:54,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498401836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:54,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133959589] [2021-06-05 21:53:54,917 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:54,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:54,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:53:54,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:55,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:55,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:55,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:55,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:55,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:55,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:55,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:55,052 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:55,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:55,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:55,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:55,056 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:55,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:55,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:55,059 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:55,113 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-06-05 21:53:55,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:55,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:55,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:53:55,124 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:55,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:55,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:53:55,128 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:55,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:55,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:53:55,152 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 21:53:55,226 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:55,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133959589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:55,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:55,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:53:55,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226596222] [2021-06-05 21:53:55,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:53:55,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:55,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:53:55,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:53:55,227 INFO L87 Difference]: Start difference. First operand 142 states and 308 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:55,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:55,460 INFO L93 Difference]: Finished difference Result 168 states and 351 transitions. [2021-06-05 21:53:55,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:53:55,460 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:55,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:55,461 INFO L225 Difference]: With dead ends: 168 [2021-06-05 21:53:55,461 INFO L226 Difference]: Without dead ends: 156 [2021-06-05 21:53:55,461 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 383.2ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:53:55,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-05 21:53:55,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 142. [2021-06-05 21:53:55,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.1843971631205674) internal successors, (308), 141 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:55,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 308 transitions. [2021-06-05 21:53:55,462 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 308 transitions. Word has length 18 [2021-06-05 21:53:55,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:55,462 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 308 transitions. [2021-06-05 21:53:55,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:55,462 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 308 transitions. [2021-06-05 21:53:55,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:55,462 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:55,463 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:55,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1400,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:55,679 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:55,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:55,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1195833762, now seen corresponding path program 254 times [2021-06-05 21:53:55,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:55,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858708541] [2021-06-05 21:53:55,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:55,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:55,859 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:55,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:55,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858708541] [2021-06-05 21:53:55,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858708541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:55,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102418470] [2021-06-05 21:53:55,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:55,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:53:55,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:55,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:53:55,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:56,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:56,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:56,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:56,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:56,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:56,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:56,016 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:56,078 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-06-05 21:53:56,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:56,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:56,082 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:56,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:56,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:56,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:53:56,108 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:56,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:56,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:56,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:53:56,135 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:56,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:56,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:53:56,157 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 21:53:56,237 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:56,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102418470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:56,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:56,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:53:56,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361530659] [2021-06-05 21:53:56,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:53:56,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:56,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:53:56,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:53:56,238 INFO L87 Difference]: Start difference. First operand 142 states and 308 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:56,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:56,789 INFO L93 Difference]: Finished difference Result 194 states and 401 transitions. [2021-06-05 21:53:56,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:53:56,789 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:56,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:56,789 INFO L225 Difference]: With dead ends: 194 [2021-06-05 21:53:56,789 INFO L226 Difference]: Without dead ends: 175 [2021-06-05 21:53:56,790 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 623.7ms TimeCoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:53:56,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-06-05 21:53:56,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 142. [2021-06-05 21:53:56,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.1843971631205674) internal successors, (308), 141 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:56,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 308 transitions. [2021-06-05 21:53:56,791 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 308 transitions. Word has length 18 [2021-06-05 21:53:56,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:56,791 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 308 transitions. [2021-06-05 21:53:56,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:56,791 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 308 transitions. [2021-06-05 21:53:56,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:56,791 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:56,791 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:56,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1403 [2021-06-05 21:53:56,992 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:56,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:56,992 INFO L82 PathProgramCache]: Analyzing trace with hash 992349414, now seen corresponding path program 255 times [2021-06-05 21:53:56,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:56,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076405804] [2021-06-05 21:53:56,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:56,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:57,146 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:57,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:57,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076405804] [2021-06-05 21:53:57,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076405804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:57,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302930294] [2021-06-05 21:53:57,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:57,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:53:57,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:57,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 21:53:57,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:57,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:57,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:57,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:57,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:57,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:57,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:53:57,308 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:57,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:57,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:57,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:57,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:53:57,333 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:57,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:57,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:53:57,337 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:57,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:57,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:53:57,357 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 21:53:57,429 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:57,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302930294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:57,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:57,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:53:57,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876058864] [2021-06-05 21:53:57,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:53:57,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:57,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:53:57,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:53:57,430 INFO L87 Difference]: Start difference. First operand 142 states and 308 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:57,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:57,716 INFO L93 Difference]: Finished difference Result 169 states and 360 transitions. [2021-06-05 21:53:57,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:53:57,716 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:57,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:57,716 INFO L225 Difference]: With dead ends: 169 [2021-06-05 21:53:57,716 INFO L226 Difference]: Without dead ends: 162 [2021-06-05 21:53:57,716 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 350.0ms TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:53:57,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-06-05 21:53:57,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 142. [2021-06-05 21:53:57,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.1843971631205674) internal successors, (308), 141 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:57,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 308 transitions. [2021-06-05 21:53:57,718 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 308 transitions. Word has length 18 [2021-06-05 21:53:57,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:57,718 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 308 transitions. [2021-06-05 21:53:57,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:57,718 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 308 transitions. [2021-06-05 21:53:57,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:57,718 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:57,718 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:57,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1408,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:57,919 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:57,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:57,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1096106590, now seen corresponding path program 256 times [2021-06-05 21:53:57,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:57,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746099003] [2021-06-05 21:53:57,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:57,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:58,067 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:58,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:58,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746099003] [2021-06-05 21:53:58,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746099003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:58,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446430242] [2021-06-05 21:53:58,068 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:58,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:53:58,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:58,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:53:58,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:58,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:58,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:58,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:53:58,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:58,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:58,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:53:58,244 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:58,273 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-06-05 21:53:58,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:58,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:53:58,277 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:53:58,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:58,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:53:58,288 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 21:53:58,327 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:58,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446430242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:58,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:58,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:53:58,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57082103] [2021-06-05 21:53:58,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:53:58,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:58,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:53:58,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:53:58,328 INFO L87 Difference]: Start difference. First operand 142 states and 308 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:58,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:58,584 INFO L93 Difference]: Finished difference Result 175 states and 360 transitions. [2021-06-05 21:53:58,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:53:58,584 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:58,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:58,584 INFO L225 Difference]: With dead ends: 175 [2021-06-05 21:53:58,585 INFO L226 Difference]: Without dead ends: 150 [2021-06-05 21:53:58,585 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 348.9ms TimeCoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:53:58,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-06-05 21:53:58,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 146. [2021-06-05 21:53:58,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.179310344827586) internal successors, (316), 145 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:58,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 316 transitions. [2021-06-05 21:53:58,586 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 316 transitions. Word has length 18 [2021-06-05 21:53:58,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:58,586 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 316 transitions. [2021-06-05 21:53:58,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:58,586 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 316 transitions. [2021-06-05 21:53:58,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:58,586 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:58,586 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:58,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1411 [2021-06-05 21:53:58,801 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:58,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:58,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1958111654, now seen corresponding path program 257 times [2021-06-05 21:53:58,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:58,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593141985] [2021-06-05 21:53:58,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:58,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:53:58,970 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:58,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:53:58,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593141985] [2021-06-05 21:53:58,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593141985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:58,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395928331] [2021-06-05 21:53:58,970 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:53:58,995 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:53:58,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:53:58,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:53:58,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:53:59,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:59,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:59,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:53:59,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:59,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:59,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:53:59,149 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:59,172 INFO L628 ElimStorePlain]: treesize reduction 36, result has 47.8 percent of original size [2021-06-05 21:53:59,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:53:59,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 21:53:59,175 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:53:59,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:53:59,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:53:59,182 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 21:53:59,218 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:53:59,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395928331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:53:59,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:53:59,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 21:53:59,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538757726] [2021-06-05 21:53:59,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:53:59,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:53:59,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:53:59,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:53:59,219 INFO L87 Difference]: Start difference. First operand 146 states and 316 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:59,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:53:59,601 INFO L93 Difference]: Finished difference Result 169 states and 357 transitions. [2021-06-05 21:53:59,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:53:59,601 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:53:59,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:53:59,601 INFO L225 Difference]: With dead ends: 169 [2021-06-05 21:53:59,602 INFO L226 Difference]: Without dead ends: 156 [2021-06-05 21:53:59,602 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 442.2ms TimeCoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:53:59,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-05 21:53:59,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 147. [2021-06-05 21:53:59,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.1780821917808217) internal successors, (318), 146 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:59,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 318 transitions. [2021-06-05 21:53:59,603 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 318 transitions. Word has length 18 [2021-06-05 21:53:59,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:53:59,603 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 318 transitions. [2021-06-05 21:53:59,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:53:59,603 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 318 transitions. [2021-06-05 21:53:59,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:53:59,603 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:53:59,603 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:53:59,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1412 [2021-06-05 21:53:59,805 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:53:59,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:53:59,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1200670370, now seen corresponding path program 258 times [2021-06-05 21:53:59,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:53:59,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948340862] [2021-06-05 21:53:59,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:53:59,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:00,009 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:00,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:00,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948340862] [2021-06-05 21:54:00,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948340862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:00,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155221380] [2021-06-05 21:54:00,009 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:00,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:54:00,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:00,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 21:54:00,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:00,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:00,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:00,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:00,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:00,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:00,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:00,142 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:00,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:00,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:00,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:00,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:54:00,168 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:00,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:00,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:54:00,171 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:00,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:00,193 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:54:00,193 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 21:54:00,284 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:00,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155221380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:00,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:00,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:54:00,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010281305] [2021-06-05 21:54:00,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:54:00,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:00,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:54:00,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:54:00,285 INFO L87 Difference]: Start difference. First operand 147 states and 318 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:00,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:00,847 INFO L93 Difference]: Finished difference Result 167 states and 353 transitions. [2021-06-05 21:54:00,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:54:00,848 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:54:00,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:00,848 INFO L225 Difference]: With dead ends: 167 [2021-06-05 21:54:00,848 INFO L226 Difference]: Without dead ends: 157 [2021-06-05 21:54:00,848 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 662.0ms TimeCoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:54:00,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-06-05 21:54:00,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 148. [2021-06-05 21:54:00,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.183673469387755) internal successors, (321), 147 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:00,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 321 transitions. [2021-06-05 21:54:00,849 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 321 transitions. Word has length 18 [2021-06-05 21:54:00,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:00,850 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 321 transitions. [2021-06-05 21:54:00,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:00,850 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 321 transitions. [2021-06-05 21:54:00,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:54:00,850 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:00,850 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:01,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1413 [2021-06-05 21:54:01,050 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:01,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:01,050 INFO L82 PathProgramCache]: Analyzing trace with hash -148672466, now seen corresponding path program 259 times [2021-06-05 21:54:01,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:01,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653183228] [2021-06-05 21:54:01,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:01,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:01,204 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:01,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:01,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653183228] [2021-06-05 21:54:01,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653183228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:01,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859403920] [2021-06-05 21:54:01,204 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:01,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:01,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:54:01,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:01,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:01,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:01,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:54:01,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:01,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:01,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:54:01,360 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:01,382 INFO L628 ElimStorePlain]: treesize reduction 36, result has 47.8 percent of original size [2021-06-05 21:54:01,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:01,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 21:54:01,389 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:01,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:01,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:54:01,399 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 21:54:01,440 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:01,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859403920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:01,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:01,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:54:01,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542279447] [2021-06-05 21:54:01,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:54:01,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:01,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:54:01,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:54:01,441 INFO L87 Difference]: Start difference. First operand 148 states and 321 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:01,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:01,720 INFO L93 Difference]: Finished difference Result 171 states and 362 transitions. [2021-06-05 21:54:01,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:54:01,721 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:54:01,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:01,721 INFO L225 Difference]: With dead ends: 171 [2021-06-05 21:54:01,721 INFO L226 Difference]: Without dead ends: 158 [2021-06-05 21:54:01,721 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 398.4ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:54:01,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-05 21:54:01,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 150. [2021-06-05 21:54:01,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.1812080536912752) internal successors, (325), 149 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:01,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 325 transitions. [2021-06-05 21:54:01,722 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 325 transitions. Word has length 18 [2021-06-05 21:54:01,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:01,722 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 325 transitions. [2021-06-05 21:54:01,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:01,723 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 325 transitions. [2021-06-05 21:54:01,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:54:01,723 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:01,723 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:01,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1418,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:01,923 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:01,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:01,923 INFO L82 PathProgramCache]: Analyzing trace with hash 987512806, now seen corresponding path program 260 times [2021-06-05 21:54:01,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:01,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386894295] [2021-06-05 21:54:01,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:01,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:02,094 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:02,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:02,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386894295] [2021-06-05 21:54:02,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386894295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:02,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994732063] [2021-06-05 21:54:02,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:02,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:54:02,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:02,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 21:54:02,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:02,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:02,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:02,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:02,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:02,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:02,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:02,227 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:02,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:02,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:02,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:02,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:54:02,252 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:02,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:02,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:54:02,256 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:02,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:02,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:54:02,277 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 21:54:02,347 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:02,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994732063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:02,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:02,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:54:02,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142004517] [2021-06-05 21:54:02,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:54:02,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:02,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:54:02,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:54:02,348 INFO L87 Difference]: Start difference. First operand 150 states and 325 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:02,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:02,664 INFO L93 Difference]: Finished difference Result 168 states and 359 transitions. [2021-06-05 21:54:02,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:54:02,664 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:54:02,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:02,664 INFO L225 Difference]: With dead ends: 168 [2021-06-05 21:54:02,664 INFO L226 Difference]: Without dead ends: 161 [2021-06-05 21:54:02,664 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 435.5ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:54:02,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-06-05 21:54:02,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 150. [2021-06-05 21:54:02,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.1812080536912752) internal successors, (325), 149 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:02,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 325 transitions. [2021-06-05 21:54:02,666 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 325 transitions. Word has length 18 [2021-06-05 21:54:02,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:02,666 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 325 transitions. [2021-06-05 21:54:02,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:02,666 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 325 transitions. [2021-06-05 21:54:02,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:54:02,666 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:02,666 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:02,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1419,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:02,866 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:02,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:02,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1158657954, now seen corresponding path program 261 times [2021-06-05 21:54:02,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:02,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365427471] [2021-06-05 21:54:02,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:02,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:03,021 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:03,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:03,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365427471] [2021-06-05 21:54:03,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365427471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:03,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154649704] [2021-06-05 21:54:03,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:03,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:54:03,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:03,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:54:03,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:03,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:03,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:03,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:03,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:03,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:03,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:03,170 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:03,233 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-06-05 21:54:03,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:03,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:54:03,237 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:03,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:03,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:03,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:03,264 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:03,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:03,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:03,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:54:03,299 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:03,319 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:03,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:54:03,320 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 21:54:03,393 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:03,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154649704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:03,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:03,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:54:03,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495891101] [2021-06-05 21:54:03,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:54:03,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:03,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:54:03,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:54:03,394 INFO L87 Difference]: Start difference. First operand 150 states and 325 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:03,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:03,737 INFO L93 Difference]: Finished difference Result 184 states and 390 transitions. [2021-06-05 21:54:03,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:54:03,738 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:54:03,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:03,738 INFO L225 Difference]: With dead ends: 184 [2021-06-05 21:54:03,738 INFO L226 Difference]: Without dead ends: 172 [2021-06-05 21:54:03,738 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 422.0ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:54:03,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-05 21:54:03,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 150. [2021-06-05 21:54:03,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.1812080536912752) internal successors, (325), 149 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:03,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 325 transitions. [2021-06-05 21:54:03,739 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 325 transitions. Word has length 18 [2021-06-05 21:54:03,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:03,740 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 325 transitions. [2021-06-05 21:54:03,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:03,740 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 325 transitions. [2021-06-05 21:54:03,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:54:03,740 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:03,740 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:03,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1422,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:03,940 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:03,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:03,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1034470746, now seen corresponding path program 262 times [2021-06-05 21:54:03,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:03,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858317221] [2021-06-05 21:54:03,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:03,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:04,096 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:04,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:04,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858317221] [2021-06-05 21:54:04,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858317221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:04,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857266523] [2021-06-05 21:54:04,097 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:04,120 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:54:04,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:04,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:54:04,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:04,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:04,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:04,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:54:04,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:04,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:04,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:54:04,246 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:04,269 INFO L628 ElimStorePlain]: treesize reduction 42, result has 44.0 percent of original size [2021-06-05 21:54:04,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:04,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 21:54:04,271 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:04,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:04,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:54:04,279 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 21:54:04,314 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:04,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857266523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:04,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:04,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:54:04,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800078737] [2021-06-05 21:54:04,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:54:04,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:04,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:54:04,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:54:04,315 INFO L87 Difference]: Start difference. First operand 150 states and 325 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:04,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:04,591 INFO L93 Difference]: Finished difference Result 172 states and 364 transitions. [2021-06-05 21:54:04,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:54:04,591 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:54:04,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:04,591 INFO L225 Difference]: With dead ends: 172 [2021-06-05 21:54:04,591 INFO L226 Difference]: Without dead ends: 159 [2021-06-05 21:54:04,591 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 371.4ms TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:54:04,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-06-05 21:54:04,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 153. [2021-06-05 21:54:04,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.1776315789473686) internal successors, (331), 152 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:04,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 331 transitions. [2021-06-05 21:54:04,593 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 331 transitions. Word has length 18 [2021-06-05 21:54:04,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:04,593 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 331 transitions. [2021-06-05 21:54:04,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:04,593 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 331 transitions. [2021-06-05 21:54:04,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:54:04,593 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:04,593 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:04,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1427,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:04,793 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:04,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:04,794 INFO L82 PathProgramCache]: Analyzing trace with hash 101714526, now seen corresponding path program 263 times [2021-06-05 21:54:04,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:04,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961181233] [2021-06-05 21:54:04,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:04,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:04,966 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:04,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:04,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961181233] [2021-06-05 21:54:04,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961181233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:04,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683292870] [2021-06-05 21:54:04,967 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:04,991 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:54:04,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:04,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:54:04,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:05,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:05,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:05,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:05,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:05,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:05,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:05,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:05,098 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:05,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:05,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:05,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:05,102 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:05,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:05,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:05,105 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:05,160 INFO L628 ElimStorePlain]: treesize reduction 77, result has 45.4 percent of original size [2021-06-05 21:54:05,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:05,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:05,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:54:05,165 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:05,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:05,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:54:05,168 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:05,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:05,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:54:05,192 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 21:54:05,267 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:05,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683292870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:05,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:05,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:54:05,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64724796] [2021-06-05 21:54:05,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:54:05,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:05,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:54:05,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:54:05,268 INFO L87 Difference]: Start difference. First operand 153 states and 331 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:05,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:05,678 INFO L93 Difference]: Finished difference Result 191 states and 391 transitions. [2021-06-05 21:54:05,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:54:05,678 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:54:05,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:05,679 INFO L225 Difference]: With dead ends: 191 [2021-06-05 21:54:05,679 INFO L226 Difference]: Without dead ends: 172 [2021-06-05 21:54:05,679 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 473.2ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:54:05,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-05 21:54:05,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 152. [2021-06-05 21:54:05,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.1788079470198674) internal successors, (329), 151 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:05,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 329 transitions. [2021-06-05 21:54:05,680 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 329 transitions. Word has length 18 [2021-06-05 21:54:05,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:05,680 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 329 transitions. [2021-06-05 21:54:05,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:05,680 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 329 transitions. [2021-06-05 21:54:05,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:54:05,681 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:05,681 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:05,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1428 [2021-06-05 21:54:05,881 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:05,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:05,881 INFO L82 PathProgramCache]: Analyzing trace with hash -2044456234, now seen corresponding path program 264 times [2021-06-05 21:54:05,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:05,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854173822] [2021-06-05 21:54:05,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:05,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:06,068 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:06,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:06,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854173822] [2021-06-05 21:54:06,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854173822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:06,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346042823] [2021-06-05 21:54:06,069 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:06,093 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:54:06,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:06,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 21:54:06,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:06,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:06,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:06,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:06,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:06,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:06,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:54:06,243 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:06,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:06,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:06,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:06,267 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:06,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:06,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:06,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:54:06,291 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:06,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:06,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:54:06,310 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-06-05 21:54:06,396 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:06,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346042823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:06,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:06,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:54:06,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203041627] [2021-06-05 21:54:06,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:54:06,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:06,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:54:06,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:54:06,397 INFO L87 Difference]: Start difference. First operand 152 states and 329 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:06,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:06,782 INFO L93 Difference]: Finished difference Result 180 states and 378 transitions. [2021-06-05 21:54:06,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:54:06,782 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:54:06,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:06,783 INFO L225 Difference]: With dead ends: 180 [2021-06-05 21:54:06,783 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 21:54:06,783 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 513.1ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:54:06,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 21:54:06,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 152. [2021-06-05 21:54:06,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.1788079470198674) internal successors, (329), 151 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:06,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 329 transitions. [2021-06-05 21:54:06,784 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 329 transitions. Word has length 18 [2021-06-05 21:54:06,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:06,784 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 329 transitions. [2021-06-05 21:54:06,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:06,784 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 329 transitions. [2021-06-05 21:54:06,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:54:06,785 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:06,785 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:06,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1431 [2021-06-05 21:54:06,985 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:06,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:06,985 INFO L82 PathProgramCache]: Analyzing trace with hash 143726942, now seen corresponding path program 265 times [2021-06-05 21:54:06,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:06,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261725627] [2021-06-05 21:54:06,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:06,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:07,154 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:07,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:07,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261725627] [2021-06-05 21:54:07,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261725627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:07,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088691770] [2021-06-05 21:54:07,154 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:07,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:07,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:54:07,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:07,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:07,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:07,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:07,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:07,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:07,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:07,340 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:07,402 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-06-05 21:54:07,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:07,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:07,406 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:07,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:07,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:07,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:54:07,432 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:07,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:07,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:07,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:54:07,458 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:07,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:07,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:54:07,480 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 21:54:07,553 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:07,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088691770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:07,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:07,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 21:54:07,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684015408] [2021-06-05 21:54:07,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:54:07,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:07,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:54:07,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:54:07,554 INFO L87 Difference]: Start difference. First operand 152 states and 329 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:07,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:07,948 INFO L93 Difference]: Finished difference Result 206 states and 426 transitions. [2021-06-05 21:54:07,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:54:07,948 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:54:07,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:07,949 INFO L225 Difference]: With dead ends: 206 [2021-06-05 21:54:07,949 INFO L226 Difference]: Without dead ends: 187 [2021-06-05 21:54:07,949 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 520.8ms TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:54:07,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-06-05 21:54:07,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 152. [2021-06-05 21:54:07,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.1788079470198674) internal successors, (329), 151 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:07,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 329 transitions. [2021-06-05 21:54:07,950 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 329 transitions. Word has length 18 [2021-06-05 21:54:07,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:07,950 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 329 transitions. [2021-06-05 21:54:07,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:07,951 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 329 transitions. [2021-06-05 21:54:07,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:54:07,951 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:07,951 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:08,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1438 [2021-06-05 21:54:08,151 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:08,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:08,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1570553646, now seen corresponding path program 266 times [2021-06-05 21:54:08,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:08,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343915955] [2021-06-05 21:54:08,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:08,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:08,314 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:08,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:08,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343915955] [2021-06-05 21:54:08,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343915955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:08,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649951784] [2021-06-05 21:54:08,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:08,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:54:08,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:08,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 21:54:08,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:08,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:08,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:54:08,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:08,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:08,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:08,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 21:54:08,472 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:08,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:08,479 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:54:08,479 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-06-05 21:54:08,514 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:08,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649951784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:08,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:08,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:54:08,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567516607] [2021-06-05 21:54:08,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:54:08,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:08,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:54:08,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:54:08,514 INFO L87 Difference]: Start difference. First operand 152 states and 329 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:08,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:08,746 INFO L93 Difference]: Finished difference Result 172 states and 364 transitions. [2021-06-05 21:54:08,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:54:08,746 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:54:08,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:08,747 INFO L225 Difference]: With dead ends: 172 [2021-06-05 21:54:08,747 INFO L226 Difference]: Without dead ends: 165 [2021-06-05 21:54:08,747 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 329.1ms TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:54:08,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-06-05 21:54:08,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 156. [2021-06-05 21:54:08,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.1806451612903226) internal successors, (338), 155 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:08,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 338 transitions. [2021-06-05 21:54:08,748 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 338 transitions. Word has length 18 [2021-06-05 21:54:08,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:08,748 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 338 transitions. [2021-06-05 21:54:08,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:08,749 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 338 transitions. [2021-06-05 21:54:08,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:54:08,749 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:08,749 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:08,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1443 [2021-06-05 21:54:08,965 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:08,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:08,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1588228378, now seen corresponding path program 267 times [2021-06-05 21:54:08,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:08,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417284410] [2021-06-05 21:54:08,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:08,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:09,143 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:09,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:09,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417284410] [2021-06-05 21:54:09,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417284410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:09,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619304986] [2021-06-05 21:54:09,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:09,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:54:09,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:09,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:54:09,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:09,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:09,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:09,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:09,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:09,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:09,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:09,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:09,365 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:09,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:09,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:09,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:09,370 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:09,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:09,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:09,373 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:09,430 INFO L628 ElimStorePlain]: treesize reduction 77, result has 47.6 percent of original size [2021-06-05 21:54:09,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:09,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:09,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:54:09,434 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:09,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:09,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:54:09,438 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:09,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:09,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:54:09,462 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 21:54:09,537 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:09,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619304986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:09,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:09,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:54:09,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862357354] [2021-06-05 21:54:09,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:54:09,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:09,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:54:09,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:54:09,538 INFO L87 Difference]: Start difference. First operand 156 states and 338 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:09,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:09,793 INFO L93 Difference]: Finished difference Result 178 states and 373 transitions. [2021-06-05 21:54:09,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:54:09,793 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:54:09,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:09,793 INFO L225 Difference]: With dead ends: 178 [2021-06-05 21:54:09,793 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 21:54:09,793 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 364.5ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:54:09,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 21:54:09,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 155. [2021-06-05 21:54:09,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.175324675324675) internal successors, (335), 154 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:09,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 335 transitions. [2021-06-05 21:54:09,795 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 335 transitions. Word has length 18 [2021-06-05 21:54:09,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:09,795 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 335 transitions. [2021-06-05 21:54:09,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:09,795 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 335 transitions. [2021-06-05 21:54:09,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:54:09,795 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:09,795 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:09,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1444 [2021-06-05 21:54:09,995 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:09,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:09,996 INFO L82 PathProgramCache]: Analyzing trace with hash 560568158, now seen corresponding path program 268 times [2021-06-05 21:54:09,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:09,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900365129] [2021-06-05 21:54:09,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:09,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:10,166 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:10,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:10,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900365129] [2021-06-05 21:54:10,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900365129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:10,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432754933] [2021-06-05 21:54:10,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:10,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:54:10,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:10,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:54:10,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:10,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:10,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:10,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:10,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:10,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:10,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:10,323 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:10,384 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-06-05 21:54:10,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:10,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:54:10,389 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:10,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:10,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:10,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:10,416 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:10,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:10,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:10,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:54:10,445 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:10,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:10,467 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:54:10,467 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 21:54:10,540 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:10,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432754933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:10,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:10,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 21:54:10,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799264469] [2021-06-05 21:54:10,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:54:10,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:10,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:54:10,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:54:10,541 INFO L87 Difference]: Start difference. First operand 155 states and 335 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:10,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:10,895 INFO L93 Difference]: Finished difference Result 203 states and 420 transitions. [2021-06-05 21:54:10,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:54:10,896 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:54:10,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:10,896 INFO L225 Difference]: With dead ends: 203 [2021-06-05 21:54:10,896 INFO L226 Difference]: Without dead ends: 184 [2021-06-05 21:54:10,896 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 468.0ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:54:10,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-06-05 21:54:10,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 154. [2021-06-05 21:54:10,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.176470588235294) internal successors, (333), 153 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:10,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 333 transitions. [2021-06-05 21:54:10,897 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 333 transitions. Word has length 18 [2021-06-05 21:54:10,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:10,898 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 333 transitions. [2021-06-05 21:54:10,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:10,898 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 333 transitions. [2021-06-05 21:54:10,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:54:10,898 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:10,898 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:11,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1447 [2021-06-05 21:54:11,098 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:11,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:11,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1546215962, now seen corresponding path program 269 times [2021-06-05 21:54:11,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:11,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739197892] [2021-06-05 21:54:11,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:11,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:11,263 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:11,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:11,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739197892] [2021-06-05 21:54:11,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739197892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:11,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871704549] [2021-06-05 21:54:11,264 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:11,288 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:54:11,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:11,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:54:11,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:11,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:11,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:11,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:11,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:11,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:11,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:11,447 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:11,508 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-06-05 21:54:11,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:11,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:54:11,512 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:11,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:11,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:11,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:11,539 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:11,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:11,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:11,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:54:11,572 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:11,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:11,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:54:11,594 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 21:54:11,672 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:11,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871704549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:11,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:11,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:54:11,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253732312] [2021-06-05 21:54:11,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:54:11,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:11,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:54:11,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:54:11,673 INFO L87 Difference]: Start difference. First operand 154 states and 333 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:12,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:12,157 INFO L93 Difference]: Finished difference Result 206 states and 426 transitions. [2021-06-05 21:54:12,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:54:12,158 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:54:12,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:12,158 INFO L225 Difference]: With dead ends: 206 [2021-06-05 21:54:12,158 INFO L226 Difference]: Without dead ends: 187 [2021-06-05 21:54:12,158 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 573.3ms TimeCoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:54:12,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-06-05 21:54:12,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 154. [2021-06-05 21:54:12,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.176470588235294) internal successors, (333), 153 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:12,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 333 transitions. [2021-06-05 21:54:12,160 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 333 transitions. Word has length 18 [2021-06-05 21:54:12,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:12,160 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 333 transitions. [2021-06-05 21:54:12,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:12,160 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 333 transitions. [2021-06-05 21:54:12,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:54:12,160 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:12,160 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:12,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1452,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:12,361 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:12,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:12,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1862953054, now seen corresponding path program 270 times [2021-06-05 21:54:12,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:12,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321367553] [2021-06-05 21:54:12,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:12,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:12,567 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:12,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:12,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321367553] [2021-06-05 21:54:12,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321367553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:12,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963913477] [2021-06-05 21:54:12,567 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:12,593 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:54:12,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:12,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:54:12,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:12,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:12,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:12,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:12,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:12,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:12,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:12,790 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:12,851 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-06-05 21:54:12,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:12,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:12,855 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:12,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:12,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:12,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:54:12,880 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:12,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:12,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:12,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:54:12,906 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:12,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:12,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:54:12,928 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 21:54:13,009 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:13,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963913477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:13,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:13,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 21:54:13,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107149754] [2021-06-05 21:54:13,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:54:13,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:13,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:54:13,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:54:13,010 INFO L87 Difference]: Start difference. First operand 154 states and 333 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:14,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:14,008 INFO L93 Difference]: Finished difference Result 272 states and 540 transitions. [2021-06-05 21:54:14,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:54:14,008 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:54:14,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:14,009 INFO L225 Difference]: With dead ends: 272 [2021-06-05 21:54:14,009 INFO L226 Difference]: Without dead ends: 232 [2021-06-05 21:54:14,009 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1097.7ms TimeCoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:54:14,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-06-05 21:54:14,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 160. [2021-06-05 21:54:14,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.2138364779874213) internal successors, (352), 159 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:14,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 352 transitions. [2021-06-05 21:54:14,010 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 352 transitions. Word has length 18 [2021-06-05 21:54:14,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:14,010 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 352 transitions. [2021-06-05 21:54:14,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:14,010 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 352 transitions. [2021-06-05 21:54:14,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:54:14,011 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:14,011 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:14,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1457 [2021-06-05 21:54:14,211 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:14,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:14,211 INFO L82 PathProgramCache]: Analyzing trace with hash 289867306, now seen corresponding path program 271 times [2021-06-05 21:54:14,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:14,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710060629] [2021-06-05 21:54:14,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:14,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:14,355 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:14,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:14,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710060629] [2021-06-05 21:54:14,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710060629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:14,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592225748] [2021-06-05 21:54:14,356 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:14,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:14,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:54:14,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:14,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:14,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:14,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:54:14,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:14,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:14,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:54:14,504 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:14,526 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-06-05 21:54:14,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:14,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:54:14,529 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:14,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:14,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:54:14,536 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 21:54:14,575 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:14,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592225748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:14,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:14,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 21:54:14,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178738203] [2021-06-05 21:54:14,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:54:14,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:14,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:54:14,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:54:14,576 INFO L87 Difference]: Start difference. First operand 160 states and 352 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:14,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:14,846 INFO L93 Difference]: Finished difference Result 184 states and 390 transitions. [2021-06-05 21:54:14,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:54:14,847 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:54:14,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:14,847 INFO L225 Difference]: With dead ends: 184 [2021-06-05 21:54:14,847 INFO L226 Difference]: Without dead ends: 168 [2021-06-05 21:54:14,847 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 338.0ms TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:54:14,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-06-05 21:54:14,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 161. [2021-06-05 21:54:14,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.2125) internal successors, (354), 160 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:14,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 354 transitions. [2021-06-05 21:54:14,848 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 354 transitions. Word has length 18 [2021-06-05 21:54:14,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:14,848 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 354 transitions. [2021-06-05 21:54:14,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:14,849 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 354 transitions. [2021-06-05 21:54:14,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:54:14,849 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:14,849 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:15,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 272 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1462 [2021-06-05 21:54:15,049 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:15,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:15,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1151872370, now seen corresponding path program 272 times [2021-06-05 21:54:15,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:15,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392687318] [2021-06-05 21:54:15,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:15,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:15,228 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:15,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:15,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392687318] [2021-06-05 21:54:15,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392687318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:15,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616118719] [2021-06-05 21:54:15,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:15,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:54:15,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:15,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 21:54:15,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:15,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:15,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:54:15,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:15,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:15,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:15,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:54:15,413 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:15,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:15,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:54:15,420 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-06-05 21:54:15,463 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:15,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616118719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:15,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:15,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 21:54:15,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96342989] [2021-06-05 21:54:15,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:54:15,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:15,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:54:15,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:54:15,464 INFO L87 Difference]: Start difference. First operand 161 states and 354 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:15,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:15,879 INFO L93 Difference]: Finished difference Result 189 states and 406 transitions. [2021-06-05 21:54:15,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:54:15,879 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:54:15,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:15,880 INFO L225 Difference]: With dead ends: 189 [2021-06-05 21:54:15,880 INFO L226 Difference]: Without dead ends: 182 [2021-06-05 21:54:15,880 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 517.2ms TimeCoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:54:15,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-06-05 21:54:15,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 162. [2021-06-05 21:54:15,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.217391304347826) internal successors, (357), 161 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:15,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 357 transitions. [2021-06-05 21:54:15,881 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 357 transitions. Word has length 18 [2021-06-05 21:54:15,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:15,881 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 357 transitions. [2021-06-05 21:54:15,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:15,881 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 357 transitions. [2021-06-05 21:54:15,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:54:15,882 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:15,882 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:16,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1463 [2021-06-05 21:54:16,082 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:16,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:16,082 INFO L82 PathProgramCache]: Analyzing trace with hash -2006909654, now seen corresponding path program 273 times [2021-06-05 21:54:16,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:16,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111729439] [2021-06-05 21:54:16,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:16,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:16,325 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:16,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:16,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111729439] [2021-06-05 21:54:16,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111729439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:16,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045367450] [2021-06-05 21:54:16,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:16,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:54:16,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:16,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 21:54:16,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:16,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:16,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:16,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:16,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:16,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:16,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:16,467 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:16,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:16,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:16,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:16,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:54:16,496 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:16,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:16,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:54:16,500 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:16,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:16,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:54:16,524 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 21:54:16,614 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:16,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045367450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:16,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:16,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 21:54:16,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839440434] [2021-06-05 21:54:16,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:54:16,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:16,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:54:16,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:54:16,615 INFO L87 Difference]: Start difference. First operand 162 states and 357 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:17,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:17,128 INFO L93 Difference]: Finished difference Result 193 states and 413 transitions. [2021-06-05 21:54:17,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:54:17,129 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:54:17,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:17,129 INFO L225 Difference]: With dead ends: 193 [2021-06-05 21:54:17,129 INFO L226 Difference]: Without dead ends: 186 [2021-06-05 21:54:17,129 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 644.0ms TimeCoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:54:17,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-06-05 21:54:17,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 162. [2021-06-05 21:54:17,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.217391304347826) internal successors, (357), 161 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:17,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 357 transitions. [2021-06-05 21:54:17,130 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 357 transitions. Word has length 18 [2021-06-05 21:54:17,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:17,131 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 357 transitions. [2021-06-05 21:54:17,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:17,131 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 357 transitions. [2021-06-05 21:54:17,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:54:17,131 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:17,131 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:17,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1464 [2021-06-05 21:54:17,332 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:17,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:17,332 INFO L82 PathProgramCache]: Analyzing trace with hash -954911750, now seen corresponding path program 274 times [2021-06-05 21:54:17,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:17,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982563126] [2021-06-05 21:54:17,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:17,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:17,473 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:17,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:17,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982563126] [2021-06-05 21:54:17,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982563126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:17,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811214398] [2021-06-05 21:54:17,474 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:17,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:54:17,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:17,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:54:17,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:17,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:17,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:17,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:54:17,617 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:17,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:17,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:54:17,620 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:17,642 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-06-05 21:54:17,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:17,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:54:17,645 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:17,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:17,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:54:17,653 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 21:54:17,689 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:17,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811214398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:17,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:17,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 21:54:17,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100663438] [2021-06-05 21:54:17,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:54:17,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:17,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:54:17,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:54:17,690 INFO L87 Difference]: Start difference. First operand 162 states and 357 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:18,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:18,027 INFO L93 Difference]: Finished difference Result 191 states and 410 transitions. [2021-06-05 21:54:18,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:54:18,027 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:54:18,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:18,027 INFO L225 Difference]: With dead ends: 191 [2021-06-05 21:54:18,027 INFO L226 Difference]: Without dead ends: 178 [2021-06-05 21:54:18,027 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 382.6ms TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:54:18,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-06-05 21:54:18,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 164. [2021-06-05 21:54:18,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.214723926380368) internal successors, (361), 163 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:18,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 361 transitions. [2021-06-05 21:54:18,029 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 361 transitions. Word has length 18 [2021-06-05 21:54:18,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:18,029 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 361 transitions. [2021-06-05 21:54:18,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:18,029 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 361 transitions. [2021-06-05 21:54:18,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:54:18,029 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:18,029 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:18,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1469,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:18,230 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:18,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:18,230 INFO L82 PathProgramCache]: Analyzing trace with hash 181273522, now seen corresponding path program 275 times [2021-06-05 21:54:18,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:18,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143961295] [2021-06-05 21:54:18,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:18,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:18,411 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:18,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:18,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143961295] [2021-06-05 21:54:18,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143961295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:18,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522327255] [2021-06-05 21:54:18,412 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:18,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:54:18,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:18,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:54:18,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:18,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:18,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:18,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:18,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:18,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:18,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:18,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:18,543 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:18,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:18,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:18,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:18,547 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:18,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:18,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:18,550 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:18,605 INFO L628 ElimStorePlain]: treesize reduction 83, result has 45.8 percent of original size [2021-06-05 21:54:18,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:18,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:18,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:54:18,610 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:18,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:18,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:54:18,614 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:18,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:18,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:54:18,638 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 21:54:18,730 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:18,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522327255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:18,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:18,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 21:54:18,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414064] [2021-06-05 21:54:18,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:54:18,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:18,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:54:18,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:54:18,731 INFO L87 Difference]: Start difference. First operand 164 states and 361 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:19,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:19,232 INFO L93 Difference]: Finished difference Result 213 states and 437 transitions. [2021-06-05 21:54:19,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:54:19,233 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:54:19,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:19,233 INFO L225 Difference]: With dead ends: 213 [2021-06-05 21:54:19,233 INFO L226 Difference]: Without dead ends: 189 [2021-06-05 21:54:19,233 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 601.4ms TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:54:19,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-06-05 21:54:19,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 161. [2021-06-05 21:54:19,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.21875) internal successors, (355), 160 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:19,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 355 transitions. [2021-06-05 21:54:19,235 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 355 transitions. Word has length 18 [2021-06-05 21:54:19,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:19,235 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 355 transitions. [2021-06-05 21:54:19,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:19,235 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 355 transitions. [2021-06-05 21:54:19,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:54:19,235 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:19,235 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:19,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1470,276 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:19,436 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:19,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:19,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1964897238, now seen corresponding path program 276 times [2021-06-05 21:54:19,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:19,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405319751] [2021-06-05 21:54:19,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:19,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:19,611 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:19,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:19,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405319751] [2021-06-05 21:54:19,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405319751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:19,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500216773] [2021-06-05 21:54:19,611 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:19,636 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:54:19,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:19,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:54:19,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:19,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:19,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:19,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:19,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:19,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:19,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:19,752 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:19,811 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-06-05 21:54:19,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:19,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:19,815 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:19,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:19,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:19,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:54:19,841 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:19,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:19,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:19,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:54:19,869 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:19,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:19,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:54:19,891 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 21:54:19,967 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:19,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500216773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:19,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:19,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 21:54:19,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607444] [2021-06-05 21:54:19,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:54:19,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:19,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:54:19,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:54:19,968 INFO L87 Difference]: Start difference. First operand 161 states and 355 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:20,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:20,484 INFO L93 Difference]: Finished difference Result 221 states and 462 transitions. [2021-06-05 21:54:20,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:54:20,485 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:54:20,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:20,485 INFO L225 Difference]: With dead ends: 221 [2021-06-05 21:54:20,485 INFO L226 Difference]: Without dead ends: 202 [2021-06-05 21:54:20,485 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 564.3ms TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:54:20,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-05 21:54:20,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 159. [2021-06-05 21:54:20,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.221518987341772) internal successors, (351), 158 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:20,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 351 transitions. [2021-06-05 21:54:20,487 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 351 transitions. Word has length 18 [2021-06-05 21:54:20,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:20,487 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 351 transitions. [2021-06-05 21:54:20,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:20,487 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 351 transitions. [2021-06-05 21:54:20,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:54:20,487 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:20,487 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:20,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1473 [2021-06-05 21:54:20,688 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:20,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:20,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1840710030, now seen corresponding path program 277 times [2021-06-05 21:54:20,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:20,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630781630] [2021-06-05 21:54:20,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:20,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:20,824 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:20,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:20,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630781630] [2021-06-05 21:54:20,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630781630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:20,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25682761] [2021-06-05 21:54:20,824 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:20,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:20,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:54:20,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:20,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:20,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:20,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:54:20,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:20,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:20,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:54:20,961 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:20,984 INFO L628 ElimStorePlain]: treesize reduction 42, result has 44.0 percent of original size [2021-06-05 21:54:20,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:20,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 21:54:20,986 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:20,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:20,993 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:54:20,993 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 21:54:21,034 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:21,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25682761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:21,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:21,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 21:54:21,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624022179] [2021-06-05 21:54:21,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:54:21,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:21,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:54:21,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:54:21,035 INFO L87 Difference]: Start difference. First operand 159 states and 351 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:21,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:21,385 INFO L93 Difference]: Finished difference Result 186 states and 399 transitions. [2021-06-05 21:54:21,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:54:21,385 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:54:21,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:21,385 INFO L225 Difference]: With dead ends: 186 [2021-06-05 21:54:21,385 INFO L226 Difference]: Without dead ends: 173 [2021-06-05 21:54:21,386 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 377.1ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:54:21,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-06-05 21:54:21,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 162. [2021-06-05 21:54:21,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.217391304347826) internal successors, (357), 161 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:21,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 357 transitions. [2021-06-05 21:54:21,387 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 357 transitions. Word has length 18 [2021-06-05 21:54:21,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:21,387 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 357 transitions. [2021-06-05 21:54:21,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:21,387 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 357 transitions. [2021-06-05 21:54:21,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:54:21,387 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:21,387 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:21,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1478 [2021-06-05 21:54:21,588 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:21,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:21,588 INFO L82 PathProgramCache]: Analyzing trace with hash -704524758, now seen corresponding path program 278 times [2021-06-05 21:54:21,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:21,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003814706] [2021-06-05 21:54:21,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:21,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:21,758 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:21,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:21,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003814706] [2021-06-05 21:54:21,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003814706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:21,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131716632] [2021-06-05 21:54:21,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:21,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:54:21,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:21,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 21:54:21,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:21,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:21,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:21,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:21,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:21,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:21,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:21,893 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:21,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:21,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:21,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:21,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:54:21,921 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:21,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:21,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:54:21,924 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:21,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:21,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:54:21,946 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 21:54:22,025 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:22,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131716632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:22,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:22,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 21:54:22,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554995440] [2021-06-05 21:54:22,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:54:22,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:22,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:54:22,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:54:22,026 INFO L87 Difference]: Start difference. First operand 162 states and 357 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:22,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:22,371 INFO L93 Difference]: Finished difference Result 184 states and 398 transitions. [2021-06-05 21:54:22,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:54:22,371 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:54:22,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:22,371 INFO L225 Difference]: With dead ends: 184 [2021-06-05 21:54:22,371 INFO L226 Difference]: Without dead ends: 177 [2021-06-05 21:54:22,371 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 428.7ms TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:54:22,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-06-05 21:54:22,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 162. [2021-06-05 21:54:22,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.217391304347826) internal successors, (357), 161 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:22,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 357 transitions. [2021-06-05 21:54:22,373 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 357 transitions. Word has length 18 [2021-06-05 21:54:22,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:22,373 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 357 transitions. [2021-06-05 21:54:22,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:22,373 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 357 transitions. [2021-06-05 21:54:22,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:54:22,373 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:22,373 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:22,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1479,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:22,574 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:22,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:22,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1444271778, now seen corresponding path program 279 times [2021-06-05 21:54:22,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:22,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541609611] [2021-06-05 21:54:22,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:22,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:22,750 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:22,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:22,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541609611] [2021-06-05 21:54:22,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541609611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:22,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056674346] [2021-06-05 21:54:22,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:22,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:54:22,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:22,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 21:54:22,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:22,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:22,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:22,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:22,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:22,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:22,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:22,868 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:22,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:22,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:22,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:22,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:54:22,894 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:22,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:22,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:54:22,898 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:22,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:22,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:54:22,920 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 21:54:23,014 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:23,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056674346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:23,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:23,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 21:54:23,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719209297] [2021-06-05 21:54:23,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:54:23,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:23,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:54:23,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:54:23,015 INFO L87 Difference]: Start difference. First operand 162 states and 357 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:23,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:23,499 INFO L93 Difference]: Finished difference Result 202 states and 434 transitions. [2021-06-05 21:54:23,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:54:23,500 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:54:23,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:23,500 INFO L225 Difference]: With dead ends: 202 [2021-06-05 21:54:23,500 INFO L226 Difference]: Without dead ends: 191 [2021-06-05 21:54:23,500 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 586.2ms TimeCoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:54:23,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-06-05 21:54:23,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 162. [2021-06-05 21:54:23,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.217391304347826) internal successors, (357), 161 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:23,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 357 transitions. [2021-06-05 21:54:23,502 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 357 transitions. Word has length 18 [2021-06-05 21:54:23,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:23,502 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 357 transitions. [2021-06-05 21:54:23,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:23,502 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 357 transitions. [2021-06-05 21:54:23,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:54:23,502 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:23,502 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:23,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1482,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:23,710 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:23,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:23,710 INFO L82 PathProgramCache]: Analyzing trace with hash -662512342, now seen corresponding path program 280 times [2021-06-05 21:54:23,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:23,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818475404] [2021-06-05 21:54:23,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:23,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:23,861 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:23,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:23,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818475404] [2021-06-05 21:54:23,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818475404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:23,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207600417] [2021-06-05 21:54:23,861 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:23,886 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:54:23,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:23,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:54:23,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:24,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:24,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:24,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:24,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:24,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:24,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:24,031 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:24,091 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-06-05 21:54:24,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:24,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:54:24,095 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:24,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:24,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:24,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:24,122 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:24,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:24,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:24,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:54:24,148 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:24,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:24,169 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:54:24,170 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 21:54:24,246 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:24,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207600417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:24,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:24,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 21:54:24,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836135099] [2021-06-05 21:54:24,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:54:24,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:24,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:54:24,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:54:24,246 INFO L87 Difference]: Start difference. First operand 162 states and 357 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:24,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:24,631 INFO L93 Difference]: Finished difference Result 219 states and 463 transitions. [2021-06-05 21:54:24,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:54:24,632 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:54:24,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:24,632 INFO L225 Difference]: With dead ends: 219 [2021-06-05 21:54:24,632 INFO L226 Difference]: Without dead ends: 200 [2021-06-05 21:54:24,632 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 427.3ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:54:24,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-06-05 21:54:24,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 163. [2021-06-05 21:54:24,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.2222222222222223) internal successors, (360), 162 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:24,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 360 transitions. [2021-06-05 21:54:24,634 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 360 transitions. Word has length 18 [2021-06-05 21:54:24,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:24,634 INFO L482 AbstractCegarLoop]: Abstraction has 163 states and 360 transitions. [2021-06-05 21:54:24,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:24,634 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 360 transitions. [2021-06-05 21:54:24,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:54:24,634 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:24,634 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:24,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1485 [2021-06-05 21:54:24,835 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:24,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:24,835 INFO L82 PathProgramCache]: Analyzing trace with hash 764314362, now seen corresponding path program 281 times [2021-06-05 21:54:24,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:24,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924817859] [2021-06-05 21:54:24,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:24,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:25,000 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:25,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:25,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924817859] [2021-06-05 21:54:25,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924817859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:25,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895913301] [2021-06-05 21:54:25,001 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:25,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:54:25,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:25,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:54:25,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:25,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:25,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:25,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:54:25,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:25,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:25,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:54:25,147 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:25,169 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-06-05 21:54:25,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:25,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:54:25,175 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:25,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:25,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:54:25,182 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 21:54:25,216 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:25,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895913301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:25,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:25,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 21:54:25,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947237840] [2021-06-05 21:54:25,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:54:25,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:25,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:54:25,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:54:25,217 INFO L87 Difference]: Start difference. First operand 163 states and 360 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:25,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:25,550 INFO L93 Difference]: Finished difference Result 203 states and 431 transitions. [2021-06-05 21:54:25,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:54:25,550 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:54:25,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:25,550 INFO L225 Difference]: With dead ends: 203 [2021-06-05 21:54:25,550 INFO L226 Difference]: Without dead ends: 184 [2021-06-05 21:54:25,550 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 404.7ms TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:54:25,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-06-05 21:54:25,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 168. [2021-06-05 21:54:25,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.215568862275449) internal successors, (370), 167 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:25,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 370 transitions. [2021-06-05 21:54:25,552 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 370 transitions. Word has length 18 [2021-06-05 21:54:25,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:25,552 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 370 transitions. [2021-06-05 21:54:25,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:25,552 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 370 transitions. [2021-06-05 21:54:25,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:54:25,552 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:25,552 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:25,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1490,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:25,753 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:25,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:25,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1900499634, now seen corresponding path program 282 times [2021-06-05 21:54:25,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:25,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438229685] [2021-06-05 21:54:25,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:25,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:25,927 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:25,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:25,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438229685] [2021-06-05 21:54:25,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438229685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:25,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412997911] [2021-06-05 21:54:25,928 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:25,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:54:25,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:25,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 21:54:25,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:26,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:26,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:26,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:26,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:26,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:26,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:26,044 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:26,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:26,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:26,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:26,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:54:26,070 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:26,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:26,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:54:26,074 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:26,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:26,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:54:26,095 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 21:54:26,183 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:26,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412997911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:26,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:26,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 21:54:26,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238426270] [2021-06-05 21:54:26,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:54:26,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:26,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:54:26,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:54:26,184 INFO L87 Difference]: Start difference. First operand 168 states and 370 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:26,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:26,623 INFO L93 Difference]: Finished difference Result 198 states and 427 transitions. [2021-06-05 21:54:26,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:54:26,623 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:54:26,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:26,624 INFO L225 Difference]: With dead ends: 198 [2021-06-05 21:54:26,624 INFO L226 Difference]: Without dead ends: 191 [2021-06-05 21:54:26,624 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 494.3ms TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:54:26,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-06-05 21:54:26,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 167. [2021-06-05 21:54:26,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.216867469879518) internal successors, (368), 166 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:26,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 368 transitions. [2021-06-05 21:54:26,625 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 368 transitions. Word has length 18 [2021-06-05 21:54:26,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:26,625 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 368 transitions. [2021-06-05 21:54:26,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:26,625 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 368 transitions. [2021-06-05 21:54:26,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:54:26,626 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:26,626 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:26,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1491,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:26,826 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:26,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:26,826 INFO L82 PathProgramCache]: Analyzing trace with hash -245671126, now seen corresponding path program 283 times [2021-06-05 21:54:26,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:26,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799928022] [2021-06-05 21:54:26,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:26,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:27,034 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:27,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:27,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799928022] [2021-06-05 21:54:27,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799928022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:27,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570666716] [2021-06-05 21:54:27,034 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:27,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:27,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:54:27,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:27,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:27,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:27,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:27,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:27,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:27,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:27,192 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:27,254 INFO L628 ElimStorePlain]: treesize reduction 91, result has 43.1 percent of original size [2021-06-05 21:54:27,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:27,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:54:27,258 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:27,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:27,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 21:54:27,285 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:27,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:27,307 INFO L518 ElimStorePlain]: Eliminatee v_prenex_236 vanished before elimination [2021-06-05 21:54:27,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:54:27,308 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:173, output treesize:36 [2021-06-05 21:54:27,384 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:27,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570666716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:27,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:27,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 21:54:27,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156568501] [2021-06-05 21:54:27,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:54:27,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:27,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:54:27,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:54:27,385 INFO L87 Difference]: Start difference. First operand 167 states and 368 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:28,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:28,019 INFO L93 Difference]: Finished difference Result 233 states and 486 transitions. [2021-06-05 21:54:28,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:54:28,019 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:54:28,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:28,019 INFO L225 Difference]: With dead ends: 233 [2021-06-05 21:54:28,019 INFO L226 Difference]: Without dead ends: 211 [2021-06-05 21:54:28,019 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 728.2ms TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:54:28,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-06-05 21:54:28,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 165. [2021-06-05 21:54:28,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.2195121951219514) internal successors, (364), 164 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:28,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 364 transitions. [2021-06-05 21:54:28,021 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 364 transitions. Word has length 18 [2021-06-05 21:54:28,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:28,021 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 364 transitions. [2021-06-05 21:54:28,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:28,021 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 364 transitions. [2021-06-05 21:54:28,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:54:28,021 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:28,021 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:28,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1496 [2021-06-05 21:54:28,222 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:28,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:28,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1942512050, now seen corresponding path program 284 times [2021-06-05 21:54:28,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:28,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377212926] [2021-06-05 21:54:28,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:28,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:28,375 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:28,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:28,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377212926] [2021-06-05 21:54:28,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377212926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:28,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270927493] [2021-06-05 21:54:28,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:28,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:54:28,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:28,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 21:54:28,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:28,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:28,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:28,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:28,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:28,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:28,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:28,505 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:28,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:28,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:28,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:28,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:54:28,531 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:28,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:28,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:54:28,534 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:28,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:28,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:54:28,556 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 21:54:28,632 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:28,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270927493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:28,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:28,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 21:54:28,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350064480] [2021-06-05 21:54:28,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:54:28,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:28,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:54:28,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:54:28,633 INFO L87 Difference]: Start difference. First operand 165 states and 364 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:29,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:29,092 INFO L93 Difference]: Finished difference Result 198 states and 430 transitions. [2021-06-05 21:54:29,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:54:29,093 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:54:29,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:29,093 INFO L225 Difference]: With dead ends: 198 [2021-06-05 21:54:29,093 INFO L226 Difference]: Without dead ends: 189 [2021-06-05 21:54:29,093 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 503.7ms TimeCoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:54:29,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-06-05 21:54:29,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 166. [2021-06-05 21:54:29,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.224242424242424) internal successors, (367), 165 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:29,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 367 transitions. [2021-06-05 21:54:29,095 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 367 transitions. Word has length 18 [2021-06-05 21:54:29,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:29,095 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 367 transitions. [2021-06-05 21:54:29,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:29,095 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 367 transitions. [2021-06-05 21:54:29,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:54:29,095 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:29,095 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:29,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1501 [2021-06-05 21:54:29,306 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:29,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:29,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1056713770, now seen corresponding path program 285 times [2021-06-05 21:54:29,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:29,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082077671] [2021-06-05 21:54:29,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:29,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:29,512 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:29,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:29,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082077671] [2021-06-05 21:54:29,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082077671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:29,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726810862] [2021-06-05 21:54:29,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:29,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:54:29,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:29,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 21:54:29,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:29,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:29,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:29,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:29,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:29,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:29,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:29,739 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:29,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:29,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:29,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:54:29,763 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:29,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:29,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:29,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:54:29,786 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:29,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:29,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:54:29,806 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-06-05 21:54:29,896 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:29,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726810862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:29,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:29,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 21:54:29,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634308567] [2021-06-05 21:54:29,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:54:29,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:29,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:54:29,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:54:29,897 INFO L87 Difference]: Start difference. First operand 166 states and 367 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:30,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:30,237 INFO L93 Difference]: Finished difference Result 204 states and 435 transitions. [2021-06-05 21:54:30,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:54:30,237 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:54:30,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:30,237 INFO L225 Difference]: With dead ends: 204 [2021-06-05 21:54:30,237 INFO L226 Difference]: Without dead ends: 190 [2021-06-05 21:54:30,237 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 485.4ms TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:54:30,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-06-05 21:54:30,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 167. [2021-06-05 21:54:30,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.2289156626506026) internal successors, (370), 166 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:30,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 370 transitions. [2021-06-05 21:54:30,239 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 370 transitions. Word has length 18 [2021-06-05 21:54:30,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:30,239 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 370 transitions. [2021-06-05 21:54:30,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:30,239 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 370 transitions. [2021-06-05 21:54:30,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:54:30,239 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:30,239 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:30,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1504 [2021-06-05 21:54:30,440 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:30,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:30,440 INFO L82 PathProgramCache]: Analyzing trace with hash -508619346, now seen corresponding path program 286 times [2021-06-05 21:54:30,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:30,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389464328] [2021-06-05 21:54:30,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:30,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:30,596 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:30,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:30,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389464328] [2021-06-05 21:54:30,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389464328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:30,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870094992] [2021-06-05 21:54:30,596 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:30,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:54:30,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:30,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:54:30,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:30,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:30,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:30,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:54:30,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:30,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:30,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:54:30,727 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:30,749 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-06-05 21:54:30,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:30,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:54:30,752 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:30,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:30,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:54:30,760 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 21:54:30,795 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:30,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870094992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:30,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:30,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 21:54:30,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879049086] [2021-06-05 21:54:30,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:54:30,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:30,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:54:30,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:54:30,795 INFO L87 Difference]: Start difference. First operand 167 states and 370 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:31,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:31,122 INFO L93 Difference]: Finished difference Result 193 states and 412 transitions. [2021-06-05 21:54:31,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:54:31,123 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:54:31,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:31,123 INFO L225 Difference]: With dead ends: 193 [2021-06-05 21:54:31,123 INFO L226 Difference]: Without dead ends: 180 [2021-06-05 21:54:31,123 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 371.3ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:54:31,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-06-05 21:54:31,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 168. [2021-06-05 21:54:31,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.2275449101796405) internal successors, (372), 167 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:31,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 372 transitions. [2021-06-05 21:54:31,125 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 372 transitions. Word has length 18 [2021-06-05 21:54:31,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:31,125 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 372 transitions. [2021-06-05 21:54:31,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:31,125 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 372 transitions. [2021-06-05 21:54:31,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:54:31,125 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:31,125 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:31,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1511,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:31,325 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:31,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:31,326 INFO L82 PathProgramCache]: Analyzing trace with hash 627565926, now seen corresponding path program 287 times [2021-06-05 21:54:31,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:31,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518807993] [2021-06-05 21:54:31,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:31,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:31,501 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:31,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:31,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518807993] [2021-06-05 21:54:31,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518807993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:31,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859313505] [2021-06-05 21:54:31,501 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:31,525 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:54:31,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:31,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:54:31,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:31,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:31,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:31,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:31,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:31,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:31,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:31,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:31,612 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:31,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:31,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:31,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:31,616 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:31,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:31,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:31,619 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:31,672 INFO L628 ElimStorePlain]: treesize reduction 77, result has 46.5 percent of original size [2021-06-05 21:54:31,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:31,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:31,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:54:31,676 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:31,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:31,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:54:31,679 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:31,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:31,703 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:54:31,703 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 21:54:31,780 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:31,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859313505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:31,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:31,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 21:54:31,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513585709] [2021-06-05 21:54:31,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:54:31,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:31,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:54:31,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:54:31,781 INFO L87 Difference]: Start difference. First operand 168 states and 372 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:32,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:32,379 INFO L93 Difference]: Finished difference Result 228 states and 470 transitions. [2021-06-05 21:54:32,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:54:32,379 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:54:32,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:32,379 INFO L225 Difference]: With dead ends: 228 [2021-06-05 21:54:32,379 INFO L226 Difference]: Without dead ends: 204 [2021-06-05 21:54:32,379 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 603.3ms TimeCoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:54:32,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-06-05 21:54:32,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 163. [2021-06-05 21:54:32,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.234567901234568) internal successors, (362), 162 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:32,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 362 transitions. [2021-06-05 21:54:32,381 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 362 transitions. Word has length 18 [2021-06-05 21:54:32,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:32,381 INFO L482 AbstractCegarLoop]: Abstraction has 163 states and 362 transitions. [2021-06-05 21:54:32,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:32,381 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 362 transitions. [2021-06-05 21:54:32,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:54:32,381 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:32,381 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:32,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1512 [2021-06-05 21:54:32,597 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:32,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:32,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1518604834, now seen corresponding path program 288 times [2021-06-05 21:54:32,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:32,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66137847] [2021-06-05 21:54:32,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:32,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:32,779 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:32,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:32,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66137847] [2021-06-05 21:54:32,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66137847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:32,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425693582] [2021-06-05 21:54:32,780 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:32,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:54:32,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:32,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:54:32,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:32,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:32,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:32,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:32,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:32,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:32,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:32,909 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:32,972 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-06-05 21:54:32,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:32,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:54:32,976 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:33,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:33,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:33,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:33,003 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:33,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:33,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:33,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:54:33,028 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:33,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:33,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:54:33,050 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 21:54:33,125 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:33,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425693582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:33,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:33,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 21:54:33,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568031180] [2021-06-05 21:54:33,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:54:33,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:33,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:54:33,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:54:33,126 INFO L87 Difference]: Start difference. First operand 163 states and 362 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:33,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:33,841 INFO L93 Difference]: Finished difference Result 244 states and 502 transitions. [2021-06-05 21:54:33,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:54:33,841 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:54:33,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:33,842 INFO L225 Difference]: With dead ends: 244 [2021-06-05 21:54:33,842 INFO L226 Difference]: Without dead ends: 218 [2021-06-05 21:54:33,842 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 759.7ms TimeCoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:54:33,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-06-05 21:54:33,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 168. [2021-06-05 21:54:33,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.2395209580838324) internal successors, (374), 167 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:33,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 374 transitions. [2021-06-05 21:54:33,843 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 374 transitions. Word has length 18 [2021-06-05 21:54:33,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:33,844 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 374 transitions. [2021-06-05 21:54:33,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:33,844 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 374 transitions. [2021-06-05 21:54:33,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:54:33,844 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:33,844 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:34,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1515,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:34,053 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:34,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:34,053 INFO L82 PathProgramCache]: Analyzing trace with hash 669578342, now seen corresponding path program 289 times [2021-06-05 21:54:34,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:34,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664483560] [2021-06-05 21:54:34,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:34,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:34,197 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:34,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:34,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664483560] [2021-06-05 21:54:34,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664483560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:34,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493217806] [2021-06-05 21:54:34,198 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:34,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:34,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 21:54:34,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:34,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:34,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:34,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:34,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:34,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:34,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:34,357 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:34,419 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-06-05 21:54:34,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:34,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:54:34,423 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:34,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:34,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:34,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:34,450 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:34,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:34,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:34,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:54:34,477 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:34,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:34,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:54:34,499 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 21:54:34,574 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:34,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493217806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:34,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:34,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 21:54:34,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072707606] [2021-06-05 21:54:34,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:54:34,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:34,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:54:34,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:54:34,575 INFO L87 Difference]: Start difference. First operand 168 states and 374 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:34,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:34,938 INFO L93 Difference]: Finished difference Result 215 states and 459 transitions. [2021-06-05 21:54:34,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:54:34,938 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:54:34,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:34,938 INFO L225 Difference]: With dead ends: 215 [2021-06-05 21:54:34,938 INFO L226 Difference]: Without dead ends: 200 [2021-06-05 21:54:34,939 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 440.4ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:54:34,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-06-05 21:54:34,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 167. [2021-06-05 21:54:34,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.2349397590361444) internal successors, (371), 166 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:34,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 371 transitions. [2021-06-05 21:54:34,940 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 371 transitions. Word has length 18 [2021-06-05 21:54:34,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:34,940 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 371 transitions. [2021-06-05 21:54:34,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:34,940 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 371 transitions. [2021-06-05 21:54:34,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:54:34,941 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:34,941 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:35,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1520 [2021-06-05 21:54:35,141 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:35,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:35,141 INFO L82 PathProgramCache]: Analyzing trace with hash -216219938, now seen corresponding path program 290 times [2021-06-05 21:54:35,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:35,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895984194] [2021-06-05 21:54:35,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:35,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:35,340 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:35,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:35,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895984194] [2021-06-05 21:54:35,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895984194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:35,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307514507] [2021-06-05 21:54:35,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:35,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:54:35,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:35,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 21:54:35,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:35,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:35,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:35,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:35,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:35,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:35,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:35,462 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:35,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:35,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:35,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:35,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:54:35,489 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:35,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:35,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:54:35,493 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:35,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:35,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:54:35,514 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 21:54:35,601 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:35,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307514507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:35,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:35,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 21:54:35,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995570043] [2021-06-05 21:54:35,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:54:35,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:35,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:54:35,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:54:35,602 INFO L87 Difference]: Start difference. First operand 167 states and 371 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:36,316 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2021-06-05 21:54:36,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:36,723 INFO L93 Difference]: Finished difference Result 290 states and 589 transitions. [2021-06-05 21:54:36,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:54:36,723 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:54:36,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:36,724 INFO L225 Difference]: With dead ends: 290 [2021-06-05 21:54:36,724 INFO L226 Difference]: Without dead ends: 253 [2021-06-05 21:54:36,724 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1117.4ms TimeCoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:54:36,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-06-05 21:54:36,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 171. [2021-06-05 21:54:36,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.2529411764705882) internal successors, (383), 170 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:36,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 383 transitions. [2021-06-05 21:54:36,726 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 383 transitions. Word has length 18 [2021-06-05 21:54:36,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:36,726 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 383 transitions. [2021-06-05 21:54:36,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:36,726 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 383 transitions. [2021-06-05 21:54:36,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:54:36,726 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:36,726 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:36,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1525,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:36,937 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:36,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:36,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1543833002, now seen corresponding path program 291 times [2021-06-05 21:54:36,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:36,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457696183] [2021-06-05 21:54:36,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:36,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:37,155 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:37,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:37,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457696183] [2021-06-05 21:54:37,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457696183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:37,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876031245] [2021-06-05 21:54:37,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:37,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:54:37,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:37,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 21:54:37,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:37,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:37,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:37,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:37,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:37,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:37,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:54:37,387 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:37,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:37,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:37,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:54:37,411 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:37,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:37,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:37,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:54:37,434 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:37,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:37,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:54:37,454 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-06-05 21:54:37,548 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:37,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876031245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:37,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:37,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 21:54:37,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566294059] [2021-06-05 21:54:37,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:54:37,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:37,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:54:37,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:54:37,548 INFO L87 Difference]: Start difference. First operand 171 states and 383 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:37,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:37,837 INFO L93 Difference]: Finished difference Result 240 states and 509 transitions. [2021-06-05 21:54:37,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:54:37,837 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:54:37,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:37,837 INFO L225 Difference]: With dead ends: 240 [2021-06-05 21:54:37,837 INFO L226 Difference]: Without dead ends: 226 [2021-06-05 21:54:37,837 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 485.4ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:54:37,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-06-05 21:54:37,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 174. [2021-06-05 21:54:37,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.2485549132947975) internal successors, (389), 173 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:37,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 389 transitions. [2021-06-05 21:54:37,839 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 389 transitions. Word has length 18 [2021-06-05 21:54:37,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:37,839 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 389 transitions. [2021-06-05 21:54:37,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:37,839 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 389 transitions. [2021-06-05 21:54:37,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:37,839 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:37,840 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:38,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1528 [2021-06-05 21:54:38,040 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:38,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:38,040 INFO L82 PathProgramCache]: Analyzing trace with hash 444669190, now seen corresponding path program 292 times [2021-06-05 21:54:38,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:38,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995065723] [2021-06-05 21:54:38,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:38,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:38,127 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:38,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:38,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995065723] [2021-06-05 21:54:38,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995065723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:38,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132146131] [2021-06-05 21:54:38,128 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:38,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:54:38,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:38,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:54:38,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:38,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 21:54:38,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:38,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 21:54:38,257 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:38,270 INFO L628 ElimStorePlain]: treesize reduction 22, result has 29.0 percent of original size [2021-06-05 21:54:38,271 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:54:38,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:54:38,271 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:9 [2021-06-05 21:54:38,288 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:38,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132146131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:38,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:38,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 21:54:38,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580267567] [2021-06-05 21:54:38,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:54:38,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:38,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:54:38,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:54:38,289 INFO L87 Difference]: Start difference. First operand 174 states and 389 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:38,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:38,411 INFO L93 Difference]: Finished difference Result 221 states and 476 transitions. [2021-06-05 21:54:38,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:54:38,412 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:38,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:38,412 INFO L225 Difference]: With dead ends: 221 [2021-06-05 21:54:38,412 INFO L226 Difference]: Without dead ends: 221 [2021-06-05 21:54:38,412 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 166.0ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:54:38,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-06-05 21:54:38,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 175. [2021-06-05 21:54:38,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.2528735632183907) internal successors, (392), 174 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:38,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 392 transitions. [2021-06-05 21:54:38,414 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 392 transitions. Word has length 19 [2021-06-05 21:54:38,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:38,414 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 392 transitions. [2021-06-05 21:54:38,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:38,414 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 392 transitions. [2021-06-05 21:54:38,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:38,414 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:38,414 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:38,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1535,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:38,615 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:38,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:38,615 INFO L82 PathProgramCache]: Analyzing trace with hash 537921546, now seen corresponding path program 293 times [2021-06-05 21:54:38,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:38,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283965697] [2021-06-05 21:54:38,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:38,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:38,699 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:38,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:38,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283965697] [2021-06-05 21:54:38,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283965697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:38,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280981521] [2021-06-05 21:54:38,700 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:38,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:54:38,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:38,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:54:38,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:38,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:38,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280981521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:38,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:38,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 21:54:38,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075971644] [2021-06-05 21:54:38,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:54:38,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:38,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:54:38,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:54:38,883 INFO L87 Difference]: Start difference. First operand 175 states and 392 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:39,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:39,382 INFO L93 Difference]: Finished difference Result 218 states and 464 transitions. [2021-06-05 21:54:39,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:54:39,383 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:39,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:39,383 INFO L225 Difference]: With dead ends: 218 [2021-06-05 21:54:39,383 INFO L226 Difference]: Without dead ends: 206 [2021-06-05 21:54:39,383 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 527.5ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:54:39,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-06-05 21:54:39,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 174. [2021-06-05 21:54:39,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.2485549132947975) internal successors, (389), 173 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:39,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 389 transitions. [2021-06-05 21:54:39,385 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 389 transitions. Word has length 19 [2021-06-05 21:54:39,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:39,385 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 389 transitions. [2021-06-05 21:54:39,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:39,385 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 389 transitions. [2021-06-05 21:54:39,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:39,385 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:39,385 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:39,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1537 [2021-06-05 21:54:39,601 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:39,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:39,601 INFO L82 PathProgramCache]: Analyzing trace with hash -520230954, now seen corresponding path program 294 times [2021-06-05 21:54:39,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:39,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773486824] [2021-06-05 21:54:39,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:39,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:39,690 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:39,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:39,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773486824] [2021-06-05 21:54:39,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773486824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:39,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133559424] [2021-06-05 21:54:39,690 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:39,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:54:39,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:39,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:54:39,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:39,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:39,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:39,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:54:39,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:39,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:39,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:54:39,876 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:39,893 INFO L628 ElimStorePlain]: treesize reduction 38, result has 28.3 percent of original size [2021-06-05 21:54:39,893 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:54:39,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:54:39,894 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 21:54:39,911 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:39,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133559424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:39,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:39,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:54:39,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965945075] [2021-06-05 21:54:39,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:54:39,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:39,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:54:39,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:54:39,911 INFO L87 Difference]: Start difference. First operand 174 states and 389 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:40,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:40,156 INFO L93 Difference]: Finished difference Result 238 states and 510 transitions. [2021-06-05 21:54:40,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:54:40,156 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:40,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:40,157 INFO L225 Difference]: With dead ends: 238 [2021-06-05 21:54:40,157 INFO L226 Difference]: Without dead ends: 238 [2021-06-05 21:54:40,157 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 266.5ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:54:40,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-06-05 21:54:40,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 175. [2021-06-05 21:54:40,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.2471264367816093) internal successors, (391), 174 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:40,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 391 transitions. [2021-06-05 21:54:40,159 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 391 transitions. Word has length 19 [2021-06-05 21:54:40,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:40,159 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 391 transitions. [2021-06-05 21:54:40,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:40,159 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 391 transitions. [2021-06-05 21:54:40,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:40,159 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:40,159 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:40,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1542,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:40,359 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:40,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:40,360 INFO L82 PathProgramCache]: Analyzing trace with hash -453676026, now seen corresponding path program 295 times [2021-06-05 21:54:40,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:40,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062478171] [2021-06-05 21:54:40,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:40,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:40,441 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:40,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:40,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062478171] [2021-06-05 21:54:40,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062478171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:40,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674295061] [2021-06-05 21:54:40,441 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:40,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:40,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:54:40,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:40,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:40,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:40,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:54:40,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:40,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:40,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:54:40,641 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:40,658 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 21:54:40,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:40,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 21:54:40,661 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:40,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:40,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:54:40,667 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 21:54:40,684 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:40,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674295061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:40,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:40,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:54:40,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659403707] [2021-06-05 21:54:40,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:54:40,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:40,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:54:40,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:54:40,685 INFO L87 Difference]: Start difference. First operand 175 states and 391 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:40,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:40,911 INFO L93 Difference]: Finished difference Result 235 states and 504 transitions. [2021-06-05 21:54:40,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:54:40,912 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:40,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:40,912 INFO L225 Difference]: With dead ends: 235 [2021-06-05 21:54:40,912 INFO L226 Difference]: Without dead ends: 235 [2021-06-05 21:54:40,912 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 276.3ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:54:40,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-06-05 21:54:40,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 176. [2021-06-05 21:54:40,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.2457142857142856) internal successors, (393), 175 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:40,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 393 transitions. [2021-06-05 21:54:40,914 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 393 transitions. Word has length 19 [2021-06-05 21:54:40,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:40,914 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 393 transitions. [2021-06-05 21:54:40,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:40,914 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 393 transitions. [2021-06-05 21:54:40,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:40,914 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:40,914 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:41,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1544 [2021-06-05 21:54:41,115 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:41,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:41,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1698455082, now seen corresponding path program 296 times [2021-06-05 21:54:41,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:41,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322608242] [2021-06-05 21:54:41,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:41,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:41,198 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:41,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:41,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322608242] [2021-06-05 21:54:41,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322608242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:41,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685209707] [2021-06-05 21:54:41,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:41,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:54:41,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:41,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:54:41,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:41,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:41,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:41,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:54:41,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:41,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:41,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:54:41,388 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:41,404 INFO L628 ElimStorePlain]: treesize reduction 36, result has 29.4 percent of original size [2021-06-05 21:54:41,404 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:54:41,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:54:41,405 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 21:54:41,421 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:41,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685209707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:41,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:41,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:54:41,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845405320] [2021-06-05 21:54:41,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:54:41,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:41,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:54:41,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:54:41,422 INFO L87 Difference]: Start difference. First operand 176 states and 393 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:41,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:41,664 INFO L93 Difference]: Finished difference Result 232 states and 498 transitions. [2021-06-05 21:54:41,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:54:41,664 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:41,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:41,664 INFO L225 Difference]: With dead ends: 232 [2021-06-05 21:54:41,664 INFO L226 Difference]: Without dead ends: 232 [2021-06-05 21:54:41,664 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 267.8ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:54:41,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-06-05 21:54:41,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 177. [2021-06-05 21:54:41,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.2443181818181817) internal successors, (395), 176 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:41,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 395 transitions. [2021-06-05 21:54:41,666 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 395 transitions. Word has length 19 [2021-06-05 21:54:41,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:41,666 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 395 transitions. [2021-06-05 21:54:41,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:41,666 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 395 transitions. [2021-06-05 21:54:41,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:41,667 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:41,667 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:41,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1546 [2021-06-05 21:54:41,867 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:41,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:41,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1810458194, now seen corresponding path program 297 times [2021-06-05 21:54:41,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:41,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977931927] [2021-06-05 21:54:41,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:41,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:41,977 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:41,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:41,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977931927] [2021-06-05 21:54:41,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977931927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:41,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141033603] [2021-06-05 21:54:41,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:42,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:54:42,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:42,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:54:42,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:42,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:42,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:42,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:54:42,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:42,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:42,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:54:42,173 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:42,209 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-06-05 21:54:42,209 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:54:42,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 21:54:42,212 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:42,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:42,224 INFO L518 ElimStorePlain]: Eliminatee v_prenex_256 vanished before elimination [2021-06-05 21:54:42,225 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:54:42,225 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 21:54:42,254 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:42,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141033603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:42,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:42,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 21:54:42,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859675762] [2021-06-05 21:54:42,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:54:42,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:42,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:54:42,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:54:42,255 INFO L87 Difference]: Start difference. First operand 177 states and 395 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:42,940 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-06-05 21:54:43,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:43,079 INFO L93 Difference]: Finished difference Result 227 states and 479 transitions. [2021-06-05 21:54:43,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:54:43,079 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:43,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:43,079 INFO L225 Difference]: With dead ends: 227 [2021-06-05 21:54:43,079 INFO L226 Difference]: Without dead ends: 224 [2021-06-05 21:54:43,080 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 832.7ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:54:43,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-06-05 21:54:43,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 182. [2021-06-05 21:54:43,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.2430939226519335) internal successors, (406), 181 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:43,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 406 transitions. [2021-06-05 21:54:43,081 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 406 transitions. Word has length 19 [2021-06-05 21:54:43,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:43,081 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 406 transitions. [2021-06-05 21:54:43,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:43,081 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 406 transitions. [2021-06-05 21:54:43,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:43,082 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:43,082 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:43,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1548,298 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:43,282 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:43,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:43,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1586526726, now seen corresponding path program 298 times [2021-06-05 21:54:43,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:43,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703975298] [2021-06-05 21:54:43,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:43,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:43,362 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:43,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:43,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703975298] [2021-06-05 21:54:43,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703975298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:43,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221550934] [2021-06-05 21:54:43,363 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:43,387 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:54:43,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:43,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:54:43,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:43,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:43,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:43,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:54:43,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:43,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:43,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:54:43,537 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:43,581 INFO L628 ElimStorePlain]: treesize reduction 78, result has 35.5 percent of original size [2021-06-05 21:54:43,582 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:54:43,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 21:54:43,584 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:43,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:43,599 INFO L518 ElimStorePlain]: Eliminatee v_prenex_259 vanished before elimination [2021-06-05 21:54:43,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:54:43,600 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-06-05 21:54:43,643 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:43,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221550934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:43,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:43,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:54:43,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618140455] [2021-06-05 21:54:43,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:54:43,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:43,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:54:43,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:54:43,644 INFO L87 Difference]: Start difference. First operand 182 states and 406 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:43,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:43,941 INFO L93 Difference]: Finished difference Result 233 states and 501 transitions. [2021-06-05 21:54:43,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:54:43,941 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:43,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:43,942 INFO L225 Difference]: With dead ends: 233 [2021-06-05 21:54:43,942 INFO L226 Difference]: Without dead ends: 233 [2021-06-05 21:54:43,942 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 317.9ms TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:54:43,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-06-05 21:54:43,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 182. [2021-06-05 21:54:43,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.2430939226519335) internal successors, (406), 181 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:43,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 406 transitions. [2021-06-05 21:54:43,943 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 406 transitions. Word has length 19 [2021-06-05 21:54:43,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:43,944 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 406 transitions. [2021-06-05 21:54:43,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:43,944 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 406 transitions. [2021-06-05 21:54:43,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:43,944 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:43,944 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:44,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1556,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:44,144 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:44,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:44,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1348323830, now seen corresponding path program 299 times [2021-06-05 21:54:44,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:44,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113777766] [2021-06-05 21:54:44,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:44,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:44,272 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:44,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:44,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113777766] [2021-06-05 21:54:44,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113777766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:44,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395670676] [2021-06-05 21:54:44,272 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:44,305 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:54:44,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:44,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:54:44,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:44,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:44,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:44,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:54:44,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:44,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:44,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:54:44,482 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:44,520 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-06-05 21:54:44,521 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:54:44,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 21:54:44,523 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:44,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:44,536 INFO L518 ElimStorePlain]: Eliminatee v_prenex_262 vanished before elimination [2021-06-05 21:54:44,537 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:54:44,537 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 21:54:44,564 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:44,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395670676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:44,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:44,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 21:54:44,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274727851] [2021-06-05 21:54:44,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:54:44,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:44,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:54:44,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:54:44,565 INFO L87 Difference]: Start difference. First operand 182 states and 406 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:45,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:45,047 INFO L93 Difference]: Finished difference Result 212 states and 458 transitions. [2021-06-05 21:54:45,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:54:45,048 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:45,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:45,048 INFO L225 Difference]: With dead ends: 212 [2021-06-05 21:54:45,048 INFO L226 Difference]: Without dead ends: 212 [2021-06-05 21:54:45,048 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 573.4ms TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:54:45,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-06-05 21:54:45,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 178. [2021-06-05 21:54:45,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.2429378531073447) internal successors, (397), 177 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:45,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 397 transitions. [2021-06-05 21:54:45,050 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 397 transitions. Word has length 19 [2021-06-05 21:54:45,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:45,050 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 397 transitions. [2021-06-05 21:54:45,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:45,050 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 397 transitions. [2021-06-05 21:54:45,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:45,050 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:45,050 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:45,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1560,300 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:45,251 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:45,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:45,251 INFO L82 PathProgramCache]: Analyzing trace with hash -944542190, now seen corresponding path program 300 times [2021-06-05 21:54:45,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:45,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675193914] [2021-06-05 21:54:45,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:45,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:45,324 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:45,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:45,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675193914] [2021-06-05 21:54:45,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675193914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:45,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922792839] [2021-06-05 21:54:45,324 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:45,350 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:54:45,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:45,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:54:45,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:45,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:45,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:45,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:54:45,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:45,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:45,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:54:45,489 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:45,505 INFO L628 ElimStorePlain]: treesize reduction 36, result has 29.4 percent of original size [2021-06-05 21:54:45,506 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:54:45,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:54:45,506 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 21:54:45,523 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:45,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922792839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:45,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:45,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:54:45,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105674098] [2021-06-05 21:54:45,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:54:45,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:45,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:54:45,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:54:45,524 INFO L87 Difference]: Start difference. First operand 178 states and 397 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:45,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:45,656 INFO L93 Difference]: Finished difference Result 201 states and 441 transitions. [2021-06-05 21:54:45,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:54:45,657 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:45,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:45,657 INFO L225 Difference]: With dead ends: 201 [2021-06-05 21:54:45,657 INFO L226 Difference]: Without dead ends: 201 [2021-06-05 21:54:45,657 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 163.9ms TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:54:45,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-06-05 21:54:45,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 178. [2021-06-05 21:54:45,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.2429378531073447) internal successors, (397), 177 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:45,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 397 transitions. [2021-06-05 21:54:45,659 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 397 transitions. Word has length 19 [2021-06-05 21:54:45,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:45,659 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 397 transitions. [2021-06-05 21:54:45,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:45,659 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 397 transitions. [2021-06-05 21:54:45,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:45,659 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:45,659 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:45,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1567,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:45,859 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:45,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:45,860 INFO L82 PathProgramCache]: Analyzing trace with hash -428211314, now seen corresponding path program 301 times [2021-06-05 21:54:45,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:45,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438314630] [2021-06-05 21:54:45,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:45,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:45,956 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:45,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:45,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438314630] [2021-06-05 21:54:45,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438314630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:45,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625571045] [2021-06-05 21:54:45,957 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:45,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:45,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:54:45,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:46,133 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:46,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625571045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:46,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:46,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 21:54:46,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128959077] [2021-06-05 21:54:46,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:54:46,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:46,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:54:46,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:54:46,133 INFO L87 Difference]: Start difference. First operand 178 states and 397 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:46,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:46,495 INFO L93 Difference]: Finished difference Result 194 states and 421 transitions. [2021-06-05 21:54:46,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:54:46,495 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:46,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:46,496 INFO L225 Difference]: With dead ends: 194 [2021-06-05 21:54:46,496 INFO L226 Difference]: Without dead ends: 185 [2021-06-05 21:54:46,496 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 386.2ms TimeCoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:54:46,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-06-05 21:54:46,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 177. [2021-06-05 21:54:46,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.2386363636363638) internal successors, (394), 176 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:46,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 394 transitions. [2021-06-05 21:54:46,497 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 394 transitions. Word has length 19 [2021-06-05 21:54:46,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:46,498 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 394 transitions. [2021-06-05 21:54:46,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:46,498 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 394 transitions. [2021-06-05 21:54:46,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:46,498 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:46,498 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:46,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1569,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:46,698 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:46,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:46,699 INFO L82 PathProgramCache]: Analyzing trace with hash -877987262, now seen corresponding path program 302 times [2021-06-05 21:54:46,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:46,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781334522] [2021-06-05 21:54:46,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:46,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:46,779 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:46,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:46,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781334522] [2021-06-05 21:54:46,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781334522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:46,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914415071] [2021-06-05 21:54:46,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:46,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:54:46,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:46,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:54:46,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:46,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:46,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:46,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:54:46,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:46,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:46,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:54:46,945 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:46,961 INFO L628 ElimStorePlain]: treesize reduction 36, result has 29.4 percent of original size [2021-06-05 21:54:46,961 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:54:46,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:54:46,962 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 21:54:46,979 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:46,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914415071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:46,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:46,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:54:46,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092142885] [2021-06-05 21:54:46,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:54:46,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:46,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:54:46,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:54:46,979 INFO L87 Difference]: Start difference. First operand 177 states and 394 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:47,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:47,116 INFO L93 Difference]: Finished difference Result 217 states and 472 transitions. [2021-06-05 21:54:47,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:54:47,116 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:47,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:47,117 INFO L225 Difference]: With dead ends: 217 [2021-06-05 21:54:47,117 INFO L226 Difference]: Without dead ends: 217 [2021-06-05 21:54:47,117 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 166.1ms TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:54:47,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-06-05 21:54:47,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 178. [2021-06-05 21:54:47,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.23728813559322) internal successors, (396), 177 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:47,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 396 transitions. [2021-06-05 21:54:47,119 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 396 transitions. Word has length 19 [2021-06-05 21:54:47,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:47,119 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 396 transitions. [2021-06-05 21:54:47,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:47,119 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 396 transitions. [2021-06-05 21:54:47,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:47,119 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:47,119 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:47,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1575,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:47,319 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:47,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:47,320 INFO L82 PathProgramCache]: Analyzing trace with hash -2122766318, now seen corresponding path program 303 times [2021-06-05 21:54:47,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:47,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510810862] [2021-06-05 21:54:47,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:47,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:47,409 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:47,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:47,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510810862] [2021-06-05 21:54:47,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510810862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:47,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579080673] [2021-06-05 21:54:47,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:47,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:54:47,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:47,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:54:47,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:47,586 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:47,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579080673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:47,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:47,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 21:54:47,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357115564] [2021-06-05 21:54:47,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:54:47,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:47,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:54:47,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:54:47,587 INFO L87 Difference]: Start difference. First operand 178 states and 396 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:47,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:47,735 INFO L93 Difference]: Finished difference Result 214 states and 466 transitions. [2021-06-05 21:54:47,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:54:47,735 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:47,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:47,735 INFO L225 Difference]: With dead ends: 214 [2021-06-05 21:54:47,735 INFO L226 Difference]: Without dead ends: 214 [2021-06-05 21:54:47,736 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 165.7ms TimeCoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:54:47,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-06-05 21:54:47,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 179. [2021-06-05 21:54:47,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.235955056179775) internal successors, (398), 178 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:47,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 398 transitions. [2021-06-05 21:54:47,737 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 398 transitions. Word has length 19 [2021-06-05 21:54:47,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:47,737 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 398 transitions. [2021-06-05 21:54:47,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:47,737 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 398 transitions. [2021-06-05 21:54:47,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:47,738 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:47,738 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:47,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1577 [2021-06-05 21:54:47,938 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:47,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:47,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1386146958, now seen corresponding path program 304 times [2021-06-05 21:54:47,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:47,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578709339] [2021-06-05 21:54:47,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:47,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:48,039 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:48,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:48,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578709339] [2021-06-05 21:54:48,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578709339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:48,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789405008] [2021-06-05 21:54:48,039 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:48,064 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:54:48,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:48,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:54:48,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:48,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:48,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:48,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:54:48,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:48,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:48,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:54:48,222 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:48,263 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-06-05 21:54:48,263 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:54:48,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 21:54:48,265 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:48,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:48,278 INFO L518 ElimStorePlain]: Eliminatee v_prenex_268 vanished before elimination [2021-06-05 21:54:48,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:54:48,279 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 21:54:48,310 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:48,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789405008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:48,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:48,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 21:54:48,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932486648] [2021-06-05 21:54:48,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:54:48,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:48,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:54:48,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:54:48,311 INFO L87 Difference]: Start difference. First operand 179 states and 398 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:48,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:48,820 INFO L93 Difference]: Finished difference Result 205 states and 439 transitions. [2021-06-05 21:54:48,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:54:48,820 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:48,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:48,821 INFO L225 Difference]: With dead ends: 205 [2021-06-05 21:54:48,821 INFO L226 Difference]: Without dead ends: 202 [2021-06-05 21:54:48,821 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 522.3ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:54:48,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-05 21:54:48,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 184. [2021-06-05 21:54:48,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.2349726775956285) internal successors, (409), 183 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:48,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 409 transitions. [2021-06-05 21:54:48,826 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 409 transitions. Word has length 19 [2021-06-05 21:54:48,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:48,826 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 409 transitions. [2021-06-05 21:54:48,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:48,826 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 409 transitions. [2021-06-05 21:54:48,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:48,826 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:48,826 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:49,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1581,305 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:49,041 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:49,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:49,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1162215490, now seen corresponding path program 305 times [2021-06-05 21:54:49,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:49,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750142675] [2021-06-05 21:54:49,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:49,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:49,120 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:49,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:49,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750142675] [2021-06-05 21:54:49,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750142675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:49,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914278891] [2021-06-05 21:54:49,120 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:49,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:54:49,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:49,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:54:49,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:49,316 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:49,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914278891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:49,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:49,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 21:54:49,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522437348] [2021-06-05 21:54:49,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:54:49,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:49,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:54:49,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:54:49,317 INFO L87 Difference]: Start difference. First operand 184 states and 409 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:49,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:49,492 INFO L93 Difference]: Finished difference Result 215 states and 469 transitions. [2021-06-05 21:54:49,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:54:49,492 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:49,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:49,492 INFO L225 Difference]: With dead ends: 215 [2021-06-05 21:54:49,492 INFO L226 Difference]: Without dead ends: 215 [2021-06-05 21:54:49,492 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 167.9ms TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:54:49,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-06-05 21:54:49,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 184. [2021-06-05 21:54:49,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.2349726775956285) internal successors, (409), 183 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:49,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 409 transitions. [2021-06-05 21:54:49,494 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 409 transitions. Word has length 19 [2021-06-05 21:54:49,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:49,494 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 409 transitions. [2021-06-05 21:54:49,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:49,494 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 409 transitions. [2021-06-05 21:54:49,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:49,495 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:49,495 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:49,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1589 [2021-06-05 21:54:49,695 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:49,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:49,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1772635066, now seen corresponding path program 306 times [2021-06-05 21:54:49,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:49,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627170547] [2021-06-05 21:54:49,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:49,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:49,793 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:49,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:49,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627170547] [2021-06-05 21:54:49,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627170547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:49,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029134169] [2021-06-05 21:54:49,793 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:49,818 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:54:49,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:49,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:54:49,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:49,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:49,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:49,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:54:49,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:49,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:49,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:54:49,985 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:50,034 INFO L628 ElimStorePlain]: treesize reduction 74, result has 41.7 percent of original size [2021-06-05 21:54:50,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:50,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 21:54:50,038 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:50,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:50,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 21:54:50,057 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:50,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:50,072 INFO L518 ElimStorePlain]: Eliminatee v_prenex_272 vanished before elimination [2021-06-05 21:54:50,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:54:50,073 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-06-05 21:54:50,116 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:50,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029134169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:50,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:50,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:54:50,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085479228] [2021-06-05 21:54:50,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:54:50,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:50,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:54:50,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:54:50,117 INFO L87 Difference]: Start difference. First operand 184 states and 409 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:50,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:50,247 INFO L93 Difference]: Finished difference Result 190 states and 418 transitions. [2021-06-05 21:54:50,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:54:50,248 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:50,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:50,248 INFO L225 Difference]: With dead ends: 190 [2021-06-05 21:54:50,248 INFO L226 Difference]: Without dead ends: 190 [2021-06-05 21:54:50,248 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 222.3ms TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:54:50,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-06-05 21:54:50,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 176. [2021-06-05 21:54:50,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.24) internal successors, (392), 175 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:50,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 392 transitions. [2021-06-05 21:54:50,250 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 392 transitions. Word has length 19 [2021-06-05 21:54:50,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:50,250 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 392 transitions. [2021-06-05 21:54:50,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:50,250 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 392 transitions. [2021-06-05 21:54:50,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:50,250 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:50,250 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:50,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1599 [2021-06-05 21:54:50,451 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:50,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:50,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1727037130, now seen corresponding path program 307 times [2021-06-05 21:54:50,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:50,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690504958] [2021-06-05 21:54:50,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:50,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:50,526 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:50,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:50,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690504958] [2021-06-05 21:54:50,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690504958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:50,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380059096] [2021-06-05 21:54:50,526 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:50,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:50,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:54:50,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:50,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:50,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:50,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:54:50,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:50,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:50,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:54:50,679 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:50,695 INFO L628 ElimStorePlain]: treesize reduction 36, result has 29.4 percent of original size [2021-06-05 21:54:50,695 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:54:50,696 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:54:50,696 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 21:54:50,712 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:50,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380059096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:50,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:50,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:54:50,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041704670] [2021-06-05 21:54:50,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:54:50,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:50,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:54:50,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:54:50,713 INFO L87 Difference]: Start difference. First operand 176 states and 392 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:50,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:50,917 INFO L93 Difference]: Finished difference Result 208 states and 454 transitions. [2021-06-05 21:54:50,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:54:50,917 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:50,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:50,917 INFO L225 Difference]: With dead ends: 208 [2021-06-05 21:54:50,917 INFO L226 Difference]: Without dead ends: 208 [2021-06-05 21:54:50,917 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 189.5ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:54:50,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-06-05 21:54:50,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 177. [2021-06-05 21:54:50,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.2386363636363638) internal successors, (394), 176 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:50,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 394 transitions. [2021-06-05 21:54:50,919 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 394 transitions. Word has length 19 [2021-06-05 21:54:50,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:50,919 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 394 transitions. [2021-06-05 21:54:50,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:50,919 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 394 transitions. [2021-06-05 21:54:50,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:50,919 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:50,919 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:51,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1605,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:51,120 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:51,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:51,120 INFO L82 PathProgramCache]: Analyzing trace with hash 482258074, now seen corresponding path program 308 times [2021-06-05 21:54:51,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:51,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132466816] [2021-06-05 21:54:51,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:51,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:51,195 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:51,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:51,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132466816] [2021-06-05 21:54:51,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132466816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:51,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308575089] [2021-06-05 21:54:51,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:51,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:54:51,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:51,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:54:51,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:51,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:51,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:51,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:54:51,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:51,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:51,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:54:51,355 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:51,371 INFO L628 ElimStorePlain]: treesize reduction 36, result has 29.4 percent of original size [2021-06-05 21:54:51,371 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:54:51,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:54:51,372 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 21:54:51,388 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:51,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308575089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:51,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:51,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:54:51,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941871391] [2021-06-05 21:54:51,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:54:51,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:51,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:54:51,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:54:51,389 INFO L87 Difference]: Start difference. First operand 177 states and 394 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:51,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:51,789 INFO L93 Difference]: Finished difference Result 228 states and 494 transitions. [2021-06-05 21:54:51,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:54:51,789 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:51,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:51,790 INFO L225 Difference]: With dead ends: 228 [2021-06-05 21:54:51,790 INFO L226 Difference]: Without dead ends: 228 [2021-06-05 21:54:51,790 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 359.6ms TimeCoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:54:51,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-06-05 21:54:51,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 178. [2021-06-05 21:54:51,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.23728813559322) internal successors, (396), 177 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:51,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 396 transitions. [2021-06-05 21:54:51,791 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 396 transitions. Word has length 19 [2021-06-05 21:54:51,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:51,791 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 396 transitions. [2021-06-05 21:54:51,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:51,791 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 396 transitions. [2021-06-05 21:54:51,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:51,792 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:51,792 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:51,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1607,309 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:51,992 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:51,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:51,992 INFO L82 PathProgramCache]: Analyzing trace with hash 122341556, now seen corresponding path program 309 times [2021-06-05 21:54:51,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:51,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573921166] [2021-06-05 21:54:51,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:51,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:52,082 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:52,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:52,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573921166] [2021-06-05 21:54:52,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573921166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:52,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596000382] [2021-06-05 21:54:52,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:52,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:54:52,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:52,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:54:52,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:52,263 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:52,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596000382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:52,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:52,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 21:54:52,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491506339] [2021-06-05 21:54:52,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:54:52,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:52,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:54:52,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:54:52,264 INFO L87 Difference]: Start difference. First operand 178 states and 396 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:52,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:52,717 INFO L93 Difference]: Finished difference Result 224 states and 487 transitions. [2021-06-05 21:54:52,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:54:52,717 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:52,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:52,718 INFO L225 Difference]: With dead ends: 224 [2021-06-05 21:54:52,718 INFO L226 Difference]: Without dead ends: 224 [2021-06-05 21:54:52,718 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 371.0ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:54:52,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-06-05 21:54:52,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 179. [2021-06-05 21:54:52,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.235955056179775) internal successors, (398), 178 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:52,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 398 transitions. [2021-06-05 21:54:52,719 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 398 transitions. Word has length 19 [2021-06-05 21:54:52,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:52,720 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 398 transitions. [2021-06-05 21:54:52,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:52,720 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 398 transitions. [2021-06-05 21:54:52,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:52,720 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:52,720 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:52,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1609,310 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:52,920 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:52,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:52,920 INFO L82 PathProgramCache]: Analyzing trace with hash 832389326, now seen corresponding path program 310 times [2021-06-05 21:54:52,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:52,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914153073] [2021-06-05 21:54:52,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:52,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:53,008 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:53,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:53,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914153073] [2021-06-05 21:54:53,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914153073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:53,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087221295] [2021-06-05 21:54:53,009 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:53,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:54:53,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:53,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:54:53,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:53,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:53,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:53,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:54:53,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:53,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:53,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:54:53,179 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:53,216 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-06-05 21:54:53,216 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:54:53,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 21:54:53,219 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:53,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:53,231 INFO L518 ElimStorePlain]: Eliminatee v_prenex_277 vanished before elimination [2021-06-05 21:54:53,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:54:53,232 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 21:54:53,258 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:53,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087221295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:53,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:53,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 21:54:53,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513757725] [2021-06-05 21:54:53,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:54:53,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:53,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:54:53,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:54:53,259 INFO L87 Difference]: Start difference. First operand 179 states and 398 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:53,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:53,646 INFO L93 Difference]: Finished difference Result 197 states and 432 transitions. [2021-06-05 21:54:53,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:54:53,646 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:53,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:53,647 INFO L225 Difference]: With dead ends: 197 [2021-06-05 21:54:53,647 INFO L226 Difference]: Without dead ends: 197 [2021-06-05 21:54:53,647 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 390.6ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:54:53,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-06-05 21:54:53,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 176. [2021-06-05 21:54:53,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.24) internal successors, (392), 175 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:53,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 392 transitions. [2021-06-05 21:54:53,648 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 392 transitions. Word has length 19 [2021-06-05 21:54:53,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:53,648 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 392 transitions. [2021-06-05 21:54:53,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:53,649 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 392 transitions. [2021-06-05 21:54:53,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:53,649 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:53,649 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:53,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1619,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:53,849 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:53,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:53,849 INFO L82 PathProgramCache]: Analyzing trace with hash -403540206, now seen corresponding path program 311 times [2021-06-05 21:54:53,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:53,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109507146] [2021-06-05 21:54:53,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:53,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:53,927 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:53,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:53,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109507146] [2021-06-05 21:54:53,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109507146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:53,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596341787] [2021-06-05 21:54:53,928 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:53,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:54:53,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:53,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:54:53,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:54,080 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:54,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596341787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:54,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:54,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:54:54,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981523850] [2021-06-05 21:54:54,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:54:54,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:54,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:54:54,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:54:54,081 INFO L87 Difference]: Start difference. First operand 176 states and 392 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:54,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:54,362 INFO L93 Difference]: Finished difference Result 213 states and 464 transitions. [2021-06-05 21:54:54,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:54:54,362 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:54,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:54,362 INFO L225 Difference]: With dead ends: 213 [2021-06-05 21:54:54,362 INFO L226 Difference]: Without dead ends: 213 [2021-06-05 21:54:54,363 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 258.0ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:54:54,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-06-05 21:54:54,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 178. [2021-06-05 21:54:54,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.23728813559322) internal successors, (396), 177 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:54,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 396 transitions. [2021-06-05 21:54:54,364 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 396 transitions. Word has length 19 [2021-06-05 21:54:54,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:54,364 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 396 transitions. [2021-06-05 21:54:54,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:54,364 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 396 transitions. [2021-06-05 21:54:54,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:54,365 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:54,365 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:54,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1626 [2021-06-05 21:54:54,565 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:54,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:54,565 INFO L82 PathProgramCache]: Analyzing trace with hash -763456724, now seen corresponding path program 312 times [2021-06-05 21:54:54,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:54,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552919833] [2021-06-05 21:54:54,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:54,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:54,643 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:54,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:54,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552919833] [2021-06-05 21:54:54,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552919833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:54,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823859870] [2021-06-05 21:54:54,643 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:54,669 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:54:54,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:54,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:54:54,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:54,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:54,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:54,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:54:54,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:54,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:54,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:54:54,772 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:54,817 INFO L628 ElimStorePlain]: treesize reduction 80, result has 35.0 percent of original size [2021-06-05 21:54:54,818 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:54:54,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 21:54:54,820 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:54,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:54,836 INFO L518 ElimStorePlain]: Eliminatee v_prenex_279 vanished before elimination [2021-06-05 21:54:54,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:54:54,837 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-06-05 21:54:54,878 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:54,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823859870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:54,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:54,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:54:54,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532931096] [2021-06-05 21:54:54,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:54:54,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:54,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:54:54,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:54:54,879 INFO L87 Difference]: Start difference. First operand 178 states and 396 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:55,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:55,340 INFO L93 Difference]: Finished difference Result 231 states and 500 transitions. [2021-06-05 21:54:55,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:54:55,340 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:55,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:55,341 INFO L225 Difference]: With dead ends: 231 [2021-06-05 21:54:55,341 INFO L226 Difference]: Without dead ends: 231 [2021-06-05 21:54:55,341 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 390.3ms TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:54:55,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-06-05 21:54:55,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 179. [2021-06-05 21:54:55,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.235955056179775) internal successors, (398), 178 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:55,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 398 transitions. [2021-06-05 21:54:55,342 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 398 transitions. Word has length 19 [2021-06-05 21:54:55,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:55,342 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 398 transitions. [2021-06-05 21:54:55,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:55,343 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 398 transitions. [2021-06-05 21:54:55,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:55,343 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:55,343 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:55,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1630 [2021-06-05 21:54:55,543 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:55,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:55,543 INFO L82 PathProgramCache]: Analyzing trace with hash -53408954, now seen corresponding path program 313 times [2021-06-05 21:54:55,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:55,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732421566] [2021-06-05 21:54:55,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:55,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:55,625 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:55,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:55,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732421566] [2021-06-05 21:54:55,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732421566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:55,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471589645] [2021-06-05 21:54:55,626 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:55,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:55,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:54:55,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:55,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:55,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:55,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:54:55,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:55,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:55,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:54:55,763 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:55,802 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-06-05 21:54:55,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 21:54:55,804 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:55,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:55,817 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:54:55,817 INFO L518 ElimStorePlain]: Eliminatee v_prenex_282 vanished before elimination [2021-06-05 21:54:55,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:54:55,818 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 21:54:55,843 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:55,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471589645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:55,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:55,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 21:54:55,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736076252] [2021-06-05 21:54:55,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:54:55,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:55,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:54:55,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:54:55,844 INFO L87 Difference]: Start difference. First operand 179 states and 398 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:56,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:56,265 INFO L93 Difference]: Finished difference Result 204 states and 446 transitions. [2021-06-05 21:54:56,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:54:56,265 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:56,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:56,266 INFO L225 Difference]: With dead ends: 204 [2021-06-05 21:54:56,266 INFO L226 Difference]: Without dead ends: 204 [2021-06-05 21:54:56,266 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 361.2ms TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:54:56,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-06-05 21:54:56,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 177. [2021-06-05 21:54:56,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.2386363636363638) internal successors, (394), 176 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:56,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 394 transitions. [2021-06-05 21:54:56,267 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 394 transitions. Word has length 19 [2021-06-05 21:54:56,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:56,267 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 394 transitions. [2021-06-05 21:54:56,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:56,267 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 394 transitions. [2021-06-05 21:54:56,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:56,268 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:56,268 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:56,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1634 [2021-06-05 21:54:56,468 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:56,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:56,468 INFO L82 PathProgramCache]: Analyzing trace with hash 998588950, now seen corresponding path program 314 times [2021-06-05 21:54:56,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:56,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161523382] [2021-06-05 21:54:56,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:56,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:56,542 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:56,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:56,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161523382] [2021-06-05 21:54:56,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161523382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:56,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902152867] [2021-06-05 21:54:56,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:56,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:54:56,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:56,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:54:56,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:56,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:56,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:56,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:54:56,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:56,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:56,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:56,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:54:56,655 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:56,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:56,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:56,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:54:56,658 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:56,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:56,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:54:56,661 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:56,701 INFO L628 ElimStorePlain]: treesize reduction 69, result has 38.9 percent of original size [2021-06-05 21:54:56,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:56,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 21:54:56,705 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:54:56,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:54:56,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:54:56,722 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:141, output treesize:22 [2021-06-05 21:54:56,753 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:56,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902152867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:56,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:56,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 21:54:56,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573238931] [2021-06-05 21:54:56,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:54:56,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:56,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:54:56,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:54:56,754 INFO L87 Difference]: Start difference. First operand 177 states and 394 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:57,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:57,043 INFO L93 Difference]: Finished difference Result 239 states and 508 transitions. [2021-06-05 21:54:57,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:54:57,044 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:57,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:57,044 INFO L225 Difference]: With dead ends: 239 [2021-06-05 21:54:57,044 INFO L226 Difference]: Without dead ends: 236 [2021-06-05 21:54:57,044 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 261.9ms TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:54:57,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-06-05 21:54:57,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 184. [2021-06-05 21:54:57,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.2459016393442623) internal successors, (411), 183 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:57,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 411 transitions. [2021-06-05 21:54:57,046 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 411 transitions. Word has length 19 [2021-06-05 21:54:57,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:57,046 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 411 transitions. [2021-06-05 21:54:57,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:57,046 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 411 transitions. [2021-06-05 21:54:57,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:57,046 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:57,046 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:57,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1641 [2021-06-05 21:54:57,246 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:57,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:57,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1424726452, now seen corresponding path program 315 times [2021-06-05 21:54:57,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:57,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765539039] [2021-06-05 21:54:57,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:57,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:57,330 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:57,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:57,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765539039] [2021-06-05 21:54:57,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765539039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:57,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725570360] [2021-06-05 21:54:57,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:57,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:54:57,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:57,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:54:57,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:57,468 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:57,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725570360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:57,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:57,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 21:54:57,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165241535] [2021-06-05 21:54:57,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:54:57,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:57,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:54:57,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:54:57,469 INFO L87 Difference]: Start difference. First operand 184 states and 411 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:57,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:57,794 INFO L93 Difference]: Finished difference Result 223 states and 480 transitions. [2021-06-05 21:54:57,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:54:57,794 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:57,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:57,795 INFO L225 Difference]: With dead ends: 223 [2021-06-05 21:54:57,795 INFO L226 Difference]: Without dead ends: 223 [2021-06-05 21:54:57,795 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 297.1ms TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:54:57,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-06-05 21:54:57,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 184. [2021-06-05 21:54:57,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.2459016393442623) internal successors, (411), 183 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:57,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 411 transitions. [2021-06-05 21:54:57,796 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 411 transitions. Word has length 19 [2021-06-05 21:54:57,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:57,796 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 411 transitions. [2021-06-05 21:54:57,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:57,797 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 411 transitions. [2021-06-05 21:54:57,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:57,797 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:57,797 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:57,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1645,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:57,997 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:57,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:57,997 INFO L82 PathProgramCache]: Analyzing trace with hash 2134774222, now seen corresponding path program 316 times [2021-06-05 21:54:57,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:57,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002543436] [2021-06-05 21:54:57,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:58,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:58,074 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:58,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:58,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002543436] [2021-06-05 21:54:58,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002543436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:58,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48449134] [2021-06-05 21:54:58,074 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:58,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:54:58,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:58,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:54:58,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:58,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:58,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:58,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:54:58,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:58,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:58,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:58,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:54:58,205 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:58,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:58,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:58,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:54:58,208 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:58,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:58,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:54:58,211 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:58,243 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 21:54:58,243 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:54:58,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:54:58,244 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 21:54:58,268 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:58,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48449134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:58,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:58,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 21:54:58,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918119513] [2021-06-05 21:54:58,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:54:58,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:58,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:54:58,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:54:58,269 INFO L87 Difference]: Start difference. First operand 184 states and 411 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:58,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:58,631 INFO L93 Difference]: Finished difference Result 249 states and 529 transitions. [2021-06-05 21:54:58,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:54:58,631 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:58,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:58,631 INFO L225 Difference]: With dead ends: 249 [2021-06-05 21:54:58,631 INFO L226 Difference]: Without dead ends: 249 [2021-06-05 21:54:58,632 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 297.7ms TimeCoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:54:58,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-06-05 21:54:58,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 183. [2021-06-05 21:54:58,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.2472527472527473) internal successors, (409), 182 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:58,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 409 transitions. [2021-06-05 21:54:58,633 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 409 transitions. Word has length 19 [2021-06-05 21:54:58,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:58,633 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 409 transitions. [2021-06-05 21:54:58,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:58,633 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 409 transitions. [2021-06-05 21:54:58,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:58,634 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:58,634 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:58,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1655 [2021-06-05 21:54:58,834 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:58,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:58,834 INFO L82 PathProgramCache]: Analyzing trace with hash -98277772, now seen corresponding path program 317 times [2021-06-05 21:54:58,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:58,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784359201] [2021-06-05 21:54:58,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:58,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:58,920 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:58,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:58,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784359201] [2021-06-05 21:54:58,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784359201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:58,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491561099] [2021-06-05 21:54:58,920 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:58,945 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:54:58,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:58,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:54:58,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:59,045 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:59,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491561099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:59,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:59,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 21:54:59,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712802460] [2021-06-05 21:54:59,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:54:59,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:59,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:54:59,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:54:59,046 INFO L87 Difference]: Start difference. First operand 183 states and 409 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:59,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:54:59,326 INFO L93 Difference]: Finished difference Result 195 states and 427 transitions. [2021-06-05 21:54:59,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:54:59,327 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:54:59,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:54:59,327 INFO L225 Difference]: With dead ends: 195 [2021-06-05 21:54:59,327 INFO L226 Difference]: Without dead ends: 191 [2021-06-05 21:54:59,327 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 293.0ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:54:59,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-06-05 21:54:59,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 183. [2021-06-05 21:54:59,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.241758241758242) internal successors, (408), 182 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:59,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 408 transitions. [2021-06-05 21:54:59,329 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 408 transitions. Word has length 19 [2021-06-05 21:54:59,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:54:59,329 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 408 transitions. [2021-06-05 21:54:59,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:54:59,329 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 408 transitions. [2021-06-05 21:54:59,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:54:59,329 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:54:59,329 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:54:59,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1665 [2021-06-05 21:54:59,529 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:54:59,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:54:59,530 INFO L82 PathProgramCache]: Analyzing trace with hash -11396538, now seen corresponding path program 318 times [2021-06-05 21:54:59,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:54:59,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168313553] [2021-06-05 21:54:59,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:54:59,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:54:59,606 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:59,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:54:59,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168313553] [2021-06-05 21:54:59,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168313553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:59,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195645158] [2021-06-05 21:54:59,606 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:54:59,631 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:54:59,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:54:59,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:54:59,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:54:59,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:59,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:59,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:54:59,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:59,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:54:59,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:54:59,727 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:54:59,741 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-06-05 21:54:59,741 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:54:59,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:54:59,742 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-06-05 21:54:59,748 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:54:59,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195645158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:54:59,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:54:59,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 21:54:59,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458542049] [2021-06-05 21:54:59,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:54:59,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:54:59,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:54:59,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:54:59,748 INFO L87 Difference]: Start difference. First operand 183 states and 408 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:00,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:00,040 INFO L93 Difference]: Finished difference Result 219 states and 476 transitions. [2021-06-05 21:55:00,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:55:00,040 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:00,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:00,040 INFO L225 Difference]: With dead ends: 219 [2021-06-05 21:55:00,040 INFO L226 Difference]: Without dead ends: 219 [2021-06-05 21:55:00,040 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 240.9ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:55:00,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-06-05 21:55:00,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 178. [2021-06-05 21:55:00,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.23728813559322) internal successors, (396), 177 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:00,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 396 transitions. [2021-06-05 21:55:00,042 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 396 transitions. Word has length 19 [2021-06-05 21:55:00,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:00,042 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 396 transitions. [2021-06-05 21:55:00,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:00,042 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 396 transitions. [2021-06-05 21:55:00,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:00,042 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:00,042 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:00,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1669 [2021-06-05 21:55:00,250 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:00,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:00,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1213288618, now seen corresponding path program 319 times [2021-06-05 21:55:00,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:00,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209145333] [2021-06-05 21:55:00,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:00,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:00,326 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:00,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:00,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209145333] [2021-06-05 21:55:00,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209145333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:00,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786123834] [2021-06-05 21:55:00,327 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:00,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:00,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:55:00,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:00,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:00,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:00,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:00,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:00,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:00,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:00,494 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:00,511 INFO L628 ElimStorePlain]: treesize reduction 38, result has 28.3 percent of original size [2021-06-05 21:55:00,511 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:55:00,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:55:00,512 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 21:55:00,529 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:00,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786123834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:00,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:00,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:00,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313260887] [2021-06-05 21:55:00,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:00,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:00,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:00,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:00,529 INFO L87 Difference]: Start difference. First operand 178 states and 396 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:00,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:00,662 INFO L93 Difference]: Finished difference Result 199 states and 437 transitions. [2021-06-05 21:55:00,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:55:00,662 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:00,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:00,662 INFO L225 Difference]: With dead ends: 199 [2021-06-05 21:55:00,663 INFO L226 Difference]: Without dead ends: 199 [2021-06-05 21:55:00,663 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 172.2ms TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:00,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-05 21:55:00,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 178. [2021-06-05 21:55:00,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.23728813559322) internal successors, (396), 177 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:00,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 396 transitions. [2021-06-05 21:55:00,664 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 396 transitions. Word has length 19 [2021-06-05 21:55:00,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:00,664 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 396 transitions. [2021-06-05 21:55:00,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:00,664 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 396 transitions. [2021-06-05 21:55:00,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:00,665 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:00,665 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:00,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1673 [2021-06-05 21:55:00,865 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:00,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:00,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1146733690, now seen corresponding path program 320 times [2021-06-05 21:55:00,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:00,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260396818] [2021-06-05 21:55:00,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:00,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:00,944 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:00,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:00,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260396818] [2021-06-05 21:55:00,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260396818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:00,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920390219] [2021-06-05 21:55:00,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:00,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:55:00,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:00,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:55:00,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:01,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:01,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:01,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:01,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:01,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:01,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:01,120 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:01,136 INFO L628 ElimStorePlain]: treesize reduction 36, result has 29.4 percent of original size [2021-06-05 21:55:01,136 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:55:01,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:55:01,137 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 21:55:01,154 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:01,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920390219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:01,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:01,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:01,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247351055] [2021-06-05 21:55:01,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:01,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:01,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:01,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:01,155 INFO L87 Difference]: Start difference. First operand 178 states and 396 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:01,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:01,552 INFO L93 Difference]: Finished difference Result 219 states and 477 transitions. [2021-06-05 21:55:01,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:55:01,552 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:01,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:01,553 INFO L225 Difference]: With dead ends: 219 [2021-06-05 21:55:01,553 INFO L226 Difference]: Without dead ends: 219 [2021-06-05 21:55:01,553 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 403.7ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:55:01,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-06-05 21:55:01,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 178. [2021-06-05 21:55:01,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.23728813559322) internal successors, (396), 177 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:01,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 396 transitions. [2021-06-05 21:55:01,554 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 396 transitions. Word has length 19 [2021-06-05 21:55:01,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:01,554 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 396 transitions. [2021-06-05 21:55:01,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:01,554 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 396 transitions. [2021-06-05 21:55:01,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:01,555 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:01,555 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:01,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1675,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:01,755 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:01,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:01,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1903454550, now seen corresponding path program 321 times [2021-06-05 21:55:01,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:01,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303329734] [2021-06-05 21:55:01,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:01,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:01,837 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:01,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:01,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303329734] [2021-06-05 21:55:01,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303329734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:01,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532498856] [2021-06-05 21:55:01,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:01,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:55:01,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:01,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:55:01,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:02,061 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:02,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532498856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:02,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:02,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:55:02,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674113043] [2021-06-05 21:55:02,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:55:02,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:02,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:55:02,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:55:02,062 INFO L87 Difference]: Start difference. First operand 178 states and 396 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:02,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:02,514 INFO L93 Difference]: Finished difference Result 234 states and 507 transitions. [2021-06-05 21:55:02,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:55:02,515 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:02,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:02,515 INFO L225 Difference]: With dead ends: 234 [2021-06-05 21:55:02,515 INFO L226 Difference]: Without dead ends: 234 [2021-06-05 21:55:02,515 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 424.9ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:55:02,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-06-05 21:55:02,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 178. [2021-06-05 21:55:02,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.23728813559322) internal successors, (396), 177 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:02,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 396 transitions. [2021-06-05 21:55:02,517 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 396 transitions. Word has length 19 [2021-06-05 21:55:02,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:02,517 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 396 transitions. [2021-06-05 21:55:02,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:02,517 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 396 transitions. [2021-06-05 21:55:02,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:02,517 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:02,517 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:02,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1677 [2021-06-05 21:55:02,718 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:02,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:02,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1117400530, now seen corresponding path program 322 times [2021-06-05 21:55:02,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:02,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817131532] [2021-06-05 21:55:02,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:02,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:02,822 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:02,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:02,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817131532] [2021-06-05 21:55:02,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817131532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:02,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971348481] [2021-06-05 21:55:02,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:02,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:55:02,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:02,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:55:02,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:03,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:03,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:03,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:03,023 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:03,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:03,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:55:03,026 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:03,062 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-06-05 21:55:03,063 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:55:03,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 21:55:03,065 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:03,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:55:03,078 INFO L518 ElimStorePlain]: Eliminatee v_prenex_288 vanished before elimination [2021-06-05 21:55:03,079 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:55:03,079 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 21:55:03,110 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:03,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971348481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:03,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:03,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:55:03,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763882670] [2021-06-05 21:55:03,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:55:03,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:03,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:55:03,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:55:03,111 INFO L87 Difference]: Start difference. First operand 178 states and 396 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:03,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:03,734 INFO L93 Difference]: Finished difference Result 208 states and 446 transitions. [2021-06-05 21:55:03,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:55:03,737 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:03,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:03,737 INFO L225 Difference]: With dead ends: 208 [2021-06-05 21:55:03,737 INFO L226 Difference]: Without dead ends: 205 [2021-06-05 21:55:03,737 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 618.4ms TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:55:03,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-05 21:55:03,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 183. [2021-06-05 21:55:03,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.2362637362637363) internal successors, (407), 182 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:03,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 407 transitions. [2021-06-05 21:55:03,739 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 407 transitions. Word has length 19 [2021-06-05 21:55:03,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:03,739 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 407 transitions. [2021-06-05 21:55:03,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:03,739 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 407 transitions. [2021-06-05 21:55:03,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:03,739 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:03,739 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:03,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1681,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:03,953 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:03,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:03,953 INFO L82 PathProgramCache]: Analyzing trace with hash 893469062, now seen corresponding path program 323 times [2021-06-05 21:55:03,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:03,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794077830] [2021-06-05 21:55:03,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:03,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:04,037 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:04,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:04,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794077830] [2021-06-05 21:55:04,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794077830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:04,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682678686] [2021-06-05 21:55:04,037 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:04,064 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:55:04,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:04,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:55:04,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:04,259 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:04,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682678686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:04,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:04,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:55:04,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233951681] [2021-06-05 21:55:04,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:55:04,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:04,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:55:04,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:55:04,260 INFO L87 Difference]: Start difference. First operand 183 states and 407 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:04,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:04,715 INFO L93 Difference]: Finished difference Result 233 states and 506 transitions. [2021-06-05 21:55:04,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:55:04,715 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:04,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:04,715 INFO L225 Difference]: With dead ends: 233 [2021-06-05 21:55:04,715 INFO L226 Difference]: Without dead ends: 233 [2021-06-05 21:55:04,715 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 459.9ms TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:55:04,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-06-05 21:55:04,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 183. [2021-06-05 21:55:04,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.2362637362637363) internal successors, (407), 182 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:04,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 407 transitions. [2021-06-05 21:55:04,726 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 407 transitions. Word has length 19 [2021-06-05 21:55:04,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:04,726 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 407 transitions. [2021-06-05 21:55:04,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:04,726 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 407 transitions. [2021-06-05 21:55:04,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:04,726 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:04,726 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:04,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1689 [2021-06-05 21:55:04,927 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:04,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:04,927 INFO L82 PathProgramCache]: Analyzing trace with hash -2041381494, now seen corresponding path program 324 times [2021-06-05 21:55:04,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:04,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442404676] [2021-06-05 21:55:04,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:04,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:05,028 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:05,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:05,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442404676] [2021-06-05 21:55:05,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442404676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:05,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758262025] [2021-06-05 21:55:05,029 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:05,054 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:55:05,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:05,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:55:05,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:05,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:05,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:05,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:55:05,223 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:05,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:05,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:05,227 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:05,271 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-06-05 21:55:05,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 21:55:05,274 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:05,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:55:05,289 INFO L518 ElimStorePlain]: Eliminatee v_prenex_292 vanished before elimination [2021-06-05 21:55:05,289 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:55:05,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:55:05,290 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 21:55:05,324 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:05,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758262025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:05,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:05,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:55:05,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586815475] [2021-06-05 21:55:05,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:55:05,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:05,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:55:05,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:55:05,324 INFO L87 Difference]: Start difference. First operand 183 states and 407 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:05,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:05,777 INFO L93 Difference]: Finished difference Result 193 states and 425 transitions. [2021-06-05 21:55:05,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:55:05,778 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:05,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:05,778 INFO L225 Difference]: With dead ends: 193 [2021-06-05 21:55:05,778 INFO L226 Difference]: Without dead ends: 193 [2021-06-05 21:55:05,778 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 445.8ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:55:05,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-06-05 21:55:05,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 174. [2021-06-05 21:55:05,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.2427745664739884) internal successors, (388), 173 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:05,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 388 transitions. [2021-06-05 21:55:05,780 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 388 transitions. Word has length 19 [2021-06-05 21:55:05,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:05,780 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 388 transitions. [2021-06-05 21:55:05,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:05,780 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 388 transitions. [2021-06-05 21:55:05,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:05,780 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:05,780 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:05,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1699,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:05,980 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:05,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:05,981 INFO L82 PathProgramCache]: Analyzing trace with hash 609668230, now seen corresponding path program 325 times [2021-06-05 21:55:05,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:05,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629403955] [2021-06-05 21:55:05,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:05,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:06,058 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:06,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:06,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629403955] [2021-06-05 21:55:06,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629403955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:06,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599753637] [2021-06-05 21:55:06,058 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:06,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:06,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:55:06,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:06,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:06,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:06,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:06,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:06,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:06,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:06,217 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:06,234 INFO L628 ElimStorePlain]: treesize reduction 34, result has 30.6 percent of original size [2021-06-05 21:55:06,234 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:55:06,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:55:06,235 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 21:55:06,251 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:06,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599753637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:06,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:06,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:06,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814257398] [2021-06-05 21:55:06,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:06,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:06,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:06,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:06,252 INFO L87 Difference]: Start difference. First operand 174 states and 388 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:06,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:06,499 INFO L93 Difference]: Finished difference Result 219 states and 477 transitions. [2021-06-05 21:55:06,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:55:06,500 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:06,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:06,500 INFO L225 Difference]: With dead ends: 219 [2021-06-05 21:55:06,500 INFO L226 Difference]: Without dead ends: 219 [2021-06-05 21:55:06,500 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 179.5ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:55:06,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-06-05 21:55:06,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 174. [2021-06-05 21:55:06,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.2427745664739884) internal successors, (388), 173 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:06,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 388 transitions. [2021-06-05 21:55:06,502 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 388 transitions. Word has length 19 [2021-06-05 21:55:06,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:06,502 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 388 transitions. [2021-06-05 21:55:06,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:06,502 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 388 transitions. [2021-06-05 21:55:06,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:06,502 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:06,502 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:06,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1706 [2021-06-05 21:55:06,703 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:06,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:06,703 INFO L82 PathProgramCache]: Analyzing trace with hash 2011797386, now seen corresponding path program 326 times [2021-06-05 21:55:06,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:06,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610088697] [2021-06-05 21:55:06,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:06,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:06,797 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:06,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:06,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610088697] [2021-06-05 21:55:06,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610088697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:06,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128983063] [2021-06-05 21:55:06,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:06,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:55:06,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:06,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:55:06,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:07,007 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:07,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128983063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:07,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:07,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:55:07,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360215161] [2021-06-05 21:55:07,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:55:07,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:07,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:55:07,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:55:07,008 INFO L87 Difference]: Start difference. First operand 174 states and 388 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:07,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:07,324 INFO L93 Difference]: Finished difference Result 187 states and 408 transitions. [2021-06-05 21:55:07,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:55:07,325 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:07,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:07,325 INFO L225 Difference]: With dead ends: 187 [2021-06-05 21:55:07,325 INFO L226 Difference]: Without dead ends: 181 [2021-06-05 21:55:07,325 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 313.5ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:55:07,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-06-05 21:55:07,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 174. [2021-06-05 21:55:07,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.2369942196531793) internal successors, (387), 173 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:07,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 387 transitions. [2021-06-05 21:55:07,327 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 387 transitions. Word has length 19 [2021-06-05 21:55:07,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:07,327 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 387 transitions. [2021-06-05 21:55:07,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:07,327 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 387 transitions. [2021-06-05 21:55:07,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:07,327 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:07,327 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:07,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1708,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:07,527 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:07,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:07,528 INFO L82 PathProgramCache]: Analyzing trace with hash -635110826, now seen corresponding path program 327 times [2021-06-05 21:55:07,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:07,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036943017] [2021-06-05 21:55:07,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:07,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:07,608 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:07,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:07,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036943017] [2021-06-05 21:55:07,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036943017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:07,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844649096] [2021-06-05 21:55:07,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:07,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:55:07,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:07,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:55:07,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:07,778 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:07,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844649096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:07,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:07,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:55:07,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388072465] [2021-06-05 21:55:07,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:55:07,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:07,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:55:07,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:55:07,779 INFO L87 Difference]: Start difference. First operand 174 states and 387 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:08,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:08,180 INFO L93 Difference]: Finished difference Result 230 states and 498 transitions. [2021-06-05 21:55:08,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:55:08,180 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:08,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:08,180 INFO L225 Difference]: With dead ends: 230 [2021-06-05 21:55:08,180 INFO L226 Difference]: Without dead ends: 230 [2021-06-05 21:55:08,180 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 364.1ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:55:08,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-06-05 21:55:08,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 174. [2021-06-05 21:55:08,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.2369942196531793) internal successors, (387), 173 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:08,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 387 transitions. [2021-06-05 21:55:08,182 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 387 transitions. Word has length 19 [2021-06-05 21:55:08,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:08,182 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 387 transitions. [2021-06-05 21:55:08,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:08,182 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 387 transitions. [2021-06-05 21:55:08,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:08,182 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:08,182 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:08,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1713,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:08,383 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:08,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:08,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1421164846, now seen corresponding path program 328 times [2021-06-05 21:55:08,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:08,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775576386] [2021-06-05 21:55:08,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:08,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:08,479 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:08,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:08,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775576386] [2021-06-05 21:55:08,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775576386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:08,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328142462] [2021-06-05 21:55:08,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:08,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:55:08,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:08,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:55:08,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:08,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:08,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:08,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:55:08,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:08,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:08,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:08,647 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:08,684 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-06-05 21:55:08,684 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:55:08,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 21:55:08,690 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:08,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:55:08,704 INFO L518 ElimStorePlain]: Eliminatee v_prenex_297 vanished before elimination [2021-06-05 21:55:08,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:55:08,705 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 21:55:08,736 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:08,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328142462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:08,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:08,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:55:08,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224204647] [2021-06-05 21:55:08,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:55:08,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:08,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:55:08,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:55:08,736 INFO L87 Difference]: Start difference. First operand 174 states and 387 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:09,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:09,346 INFO L93 Difference]: Finished difference Result 212 states and 452 transitions. [2021-06-05 21:55:09,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:55:09,346 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:09,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:09,347 INFO L225 Difference]: With dead ends: 212 [2021-06-05 21:55:09,347 INFO L226 Difference]: Without dead ends: 209 [2021-06-05 21:55:09,347 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 569.2ms TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:55:09,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-06-05 21:55:09,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 178. [2021-06-05 21:55:09,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.231638418079096) internal successors, (395), 177 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:09,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 395 transitions. [2021-06-05 21:55:09,349 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 395 transitions. Word has length 19 [2021-06-05 21:55:09,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:09,349 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 395 transitions. [2021-06-05 21:55:09,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:09,349 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 395 transitions. [2021-06-05 21:55:09,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:09,349 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:09,349 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:09,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1717,329 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:09,550 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:09,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:09,550 INFO L82 PathProgramCache]: Analyzing trace with hash -995027344, now seen corresponding path program 329 times [2021-06-05 21:55:09,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:09,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804243962] [2021-06-05 21:55:09,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:09,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:09,634 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:09,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:09,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804243962] [2021-06-05 21:55:09,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804243962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:09,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536799038] [2021-06-05 21:55:09,634 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:09,670 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:55:09,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:09,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:55:09,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:09,863 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:09,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536799038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:09,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:09,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:09,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598180796] [2021-06-05 21:55:09,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:09,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:09,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:09,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:09,864 INFO L87 Difference]: Start difference. First operand 178 states and 395 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:10,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:10,476 INFO L93 Difference]: Finished difference Result 243 states and 525 transitions. [2021-06-05 21:55:10,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:55:10,476 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:10,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:10,477 INFO L225 Difference]: With dead ends: 243 [2021-06-05 21:55:10,477 INFO L226 Difference]: Without dead ends: 243 [2021-06-05 21:55:10,477 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 566.5ms TimeCoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:55:10,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-06-05 21:55:10,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 178. [2021-06-05 21:55:10,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.231638418079096) internal successors, (395), 177 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:10,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 395 transitions. [2021-06-05 21:55:10,479 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 395 transitions. Word has length 19 [2021-06-05 21:55:10,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:10,479 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 395 transitions. [2021-06-05 21:55:10,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:10,479 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 395 transitions. [2021-06-05 21:55:10,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:10,479 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:10,479 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:10,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1725,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:10,680 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:10,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:10,680 INFO L82 PathProgramCache]: Analyzing trace with hash -284979574, now seen corresponding path program 330 times [2021-06-05 21:55:10,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:10,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382718499] [2021-06-05 21:55:10,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:10,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:10,771 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:10,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:10,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382718499] [2021-06-05 21:55:10,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382718499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:10,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477368760] [2021-06-05 21:55:10,771 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:10,800 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:55:10,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:10,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:55:10,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:10,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:10,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:10,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:10,975 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:10,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:10,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:55:10,978 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:11,026 INFO L628 ElimStorePlain]: treesize reduction 74, result has 41.7 percent of original size [2021-06-05 21:55:11,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:11,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 21:55:11,030 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:55:11,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:55:11,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 21:55:11,062 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:11,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:55:11,079 INFO L518 ElimStorePlain]: Eliminatee v_prenex_301 vanished before elimination [2021-06-05 21:55:11,079 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:55:11,080 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-06-05 21:55:11,123 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:11,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477368760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:11,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:11,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:11,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697916098] [2021-06-05 21:55:11,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:11,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:11,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:11,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:11,124 INFO L87 Difference]: Start difference. First operand 178 states and 395 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:11,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:11,421 INFO L93 Difference]: Finished difference Result 197 states and 431 transitions. [2021-06-05 21:55:11,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:55:11,421 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:11,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:11,421 INFO L225 Difference]: With dead ends: 197 [2021-06-05 21:55:11,421 INFO L226 Difference]: Without dead ends: 197 [2021-06-05 21:55:11,421 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 312.1ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:55:11,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-06-05 21:55:11,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 170. [2021-06-05 21:55:11,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.2366863905325443) internal successors, (378), 169 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:11,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 378 transitions. [2021-06-05 21:55:11,423 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 378 transitions. Word has length 19 [2021-06-05 21:55:11,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:11,423 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 378 transitions. [2021-06-05 21:55:11,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:11,423 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 378 transitions. [2021-06-05 21:55:11,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:11,423 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:11,423 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:11,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1737 [2021-06-05 21:55:11,624 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:11,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:11,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1084115286, now seen corresponding path program 331 times [2021-06-05 21:55:11,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:11,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773500396] [2021-06-05 21:55:11,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:11,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:11,721 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:11,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:11,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773500396] [2021-06-05 21:55:11,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773500396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:11,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266600430] [2021-06-05 21:55:11,722 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:11,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:11,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:55:11,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:11,874 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:11,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266600430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:11,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:11,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:55:11,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839364936] [2021-06-05 21:55:11,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:55:11,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:11,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:55:11,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:55:11,875 INFO L87 Difference]: Start difference. First operand 170 states and 378 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:12,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:12,057 INFO L93 Difference]: Finished difference Result 208 states and 453 transitions. [2021-06-05 21:55:12,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:55:12,058 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:12,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:12,058 INFO L225 Difference]: With dead ends: 208 [2021-06-05 21:55:12,058 INFO L226 Difference]: Without dead ends: 208 [2021-06-05 21:55:12,058 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 206.9ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:55:12,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-06-05 21:55:12,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 171. [2021-06-05 21:55:12,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.235294117647059) internal successors, (380), 170 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:12,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 380 transitions. [2021-06-05 21:55:12,060 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 380 transitions. Word has length 19 [2021-06-05 21:55:12,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:12,060 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 380 transitions. [2021-06-05 21:55:12,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:12,060 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 380 transitions. [2021-06-05 21:55:12,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:12,060 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:12,060 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:12,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1743 [2021-06-05 21:55:12,265 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:12,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:12,265 INFO L82 PathProgramCache]: Analyzing trace with hash 724198768, now seen corresponding path program 332 times [2021-06-05 21:55:12,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:12,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667544082] [2021-06-05 21:55:12,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:12,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:12,351 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:12,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:12,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667544082] [2021-06-05 21:55:12,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667544082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:12,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986243101] [2021-06-05 21:55:12,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:12,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:55:12,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:12,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:55:12,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:12,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:12,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:12,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:12,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:12,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:12,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:12,487 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:12,538 INFO L628 ElimStorePlain]: treesize reduction 78, result has 35.5 percent of original size [2021-06-05 21:55:12,539 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:55:12,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 21:55:12,541 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:12,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:55:12,557 INFO L518 ElimStorePlain]: Eliminatee v_prenex_303 vanished before elimination [2021-06-05 21:55:12,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:55:12,558 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-06-05 21:55:12,599 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:12,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986243101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:12,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:12,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:12,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430175152] [2021-06-05 21:55:12,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:12,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:12,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:12,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:12,600 INFO L87 Difference]: Start difference. First operand 171 states and 380 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:12,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:12,868 INFO L93 Difference]: Finished difference Result 226 states and 489 transitions. [2021-06-05 21:55:12,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:55:12,868 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:12,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:12,868 INFO L225 Difference]: With dead ends: 226 [2021-06-05 21:55:12,868 INFO L226 Difference]: Without dead ends: 226 [2021-06-05 21:55:12,868 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 259.4ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:55:12,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-06-05 21:55:12,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 172. [2021-06-05 21:55:12,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.2339181286549707) internal successors, (382), 171 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:12,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 382 transitions. [2021-06-05 21:55:12,870 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 382 transitions. Word has length 19 [2021-06-05 21:55:12,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:12,870 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 382 transitions. [2021-06-05 21:55:12,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:12,870 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 382 transitions. [2021-06-05 21:55:12,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:12,870 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:12,870 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:13,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1747 [2021-06-05 21:55:13,084 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:13,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:13,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1434246538, now seen corresponding path program 333 times [2021-06-05 21:55:13,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:13,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139251660] [2021-06-05 21:55:13,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:13,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:13,173 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:13,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:13,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139251660] [2021-06-05 21:55:13,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139251660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:13,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591428214] [2021-06-05 21:55:13,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:13,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:55:13,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:13,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:55:13,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:13,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:13,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:13,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:13,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:13,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:13,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:55:13,309 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:13,372 INFO L628 ElimStorePlain]: treesize reduction 74, result has 41.7 percent of original size [2021-06-05 21:55:13,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:13,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 21:55:13,376 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:55:13,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:55:13,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 21:55:13,404 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:13,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:55:13,423 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:55:13,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:55:13,424 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-06-05 21:55:13,488 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:13,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591428214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:13,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:13,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:13,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026501543] [2021-06-05 21:55:13,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:13,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:13,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:13,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:13,489 INFO L87 Difference]: Start difference. First operand 172 states and 382 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:13,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:13,801 INFO L93 Difference]: Finished difference Result 197 states and 431 transitions. [2021-06-05 21:55:13,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:55:13,801 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:13,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:13,801 INFO L225 Difference]: With dead ends: 197 [2021-06-05 21:55:13,801 INFO L226 Difference]: Without dead ends: 197 [2021-06-05 21:55:13,802 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 283.9ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:55:13,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-06-05 21:55:13,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 170. [2021-06-05 21:55:13,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.2366863905325443) internal successors, (378), 169 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:13,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 378 transitions. [2021-06-05 21:55:13,803 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 378 transitions. Word has length 19 [2021-06-05 21:55:13,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:13,803 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 378 transitions. [2021-06-05 21:55:13,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:13,803 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 378 transitions. [2021-06-05 21:55:13,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:13,803 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:13,803 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:14,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1751,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:14,017 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:14,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:14,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1808722854, now seen corresponding path program 334 times [2021-06-05 21:55:14,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:14,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106976055] [2021-06-05 21:55:14,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:14,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:14,104 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:14,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:14,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106976055] [2021-06-05 21:55:14,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106976055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:14,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512327698] [2021-06-05 21:55:14,104 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:14,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:55:14,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:14,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:55:14,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:14,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:14,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:14,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:14,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:14,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:14,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:14,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:55:14,253 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:14,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:14,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:14,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:55:14,257 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:14,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:14,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:55:14,259 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:14,292 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 21:55:14,292 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:55:14,292 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:55:14,293 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 21:55:14,320 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:14,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512327698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:14,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:14,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:55:14,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899685182] [2021-06-05 21:55:14,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:55:14,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:14,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:55:14,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:55:14,321 INFO L87 Difference]: Start difference. First operand 170 states and 378 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:14,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:14,758 INFO L93 Difference]: Finished difference Result 231 states and 487 transitions. [2021-06-05 21:55:14,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:55:14,758 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:14,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:14,759 INFO L225 Difference]: With dead ends: 231 [2021-06-05 21:55:14,759 INFO L226 Difference]: Without dead ends: 228 [2021-06-05 21:55:14,759 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 457.4ms TimeCoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:55:14,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-06-05 21:55:14,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 175. [2021-06-05 21:55:14,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.235632183908046) internal successors, (389), 174 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:14,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 389 transitions. [2021-06-05 21:55:14,761 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 389 transitions. Word has length 19 [2021-06-05 21:55:14,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:14,761 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 389 transitions. [2021-06-05 21:55:14,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:14,761 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 389 transitions. [2021-06-05 21:55:14,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:14,761 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:14,761 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:14,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1755 [2021-06-05 21:55:14,961 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:14,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:14,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1382585352, now seen corresponding path program 335 times [2021-06-05 21:55:14,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:14,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002197217] [2021-06-05 21:55:14,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:14,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:15,049 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:15,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:15,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002197217] [2021-06-05 21:55:15,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002197217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:15,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848531275] [2021-06-05 21:55:15,050 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:15,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:55:15,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:15,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:55:15,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:15,205 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:15,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848531275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:15,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:15,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:55:15,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753358886] [2021-06-05 21:55:15,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:55:15,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:15,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:55:15,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:55:15,206 INFO L87 Difference]: Start difference. First operand 175 states and 389 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:15,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:15,516 INFO L93 Difference]: Finished difference Result 209 states and 448 transitions. [2021-06-05 21:55:15,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:55:15,516 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:15,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:15,517 INFO L225 Difference]: With dead ends: 209 [2021-06-05 21:55:15,517 INFO L226 Difference]: Without dead ends: 209 [2021-06-05 21:55:15,517 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 334.9ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:55:15,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-06-05 21:55:15,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 175. [2021-06-05 21:55:15,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.235632183908046) internal successors, (389), 174 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:15,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 389 transitions. [2021-06-05 21:55:15,518 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 389 transitions. Word has length 19 [2021-06-05 21:55:15,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:15,518 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 389 transitions. [2021-06-05 21:55:15,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:15,519 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 389 transitions. [2021-06-05 21:55:15,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:15,519 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:15,519 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:15,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1766,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:15,719 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:15,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:15,720 INFO L82 PathProgramCache]: Analyzing trace with hash -672537582, now seen corresponding path program 336 times [2021-06-05 21:55:15,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:15,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843247845] [2021-06-05 21:55:15,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:15,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:15,814 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:15,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:15,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843247845] [2021-06-05 21:55:15,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843247845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:15,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790449853] [2021-06-05 21:55:15,814 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:15,840 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:55:15,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:15,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:55:15,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:15,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:15,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:15,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:15,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:15,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:15,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:15,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:55:15,945 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:15,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:15,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:15,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:15,949 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:15,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:15,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:55:15,952 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:15,997 INFO L628 ElimStorePlain]: treesize reduction 69, result has 38.9 percent of original size [2021-06-05 21:55:15,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:16,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 21:55:16,001 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:55:16,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:55:16,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:55:16,021 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:141, output treesize:22 [2021-06-05 21:55:16,068 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:16,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790449853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:16,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:16,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:16,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267297625] [2021-06-05 21:55:16,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:16,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:16,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:16,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:16,069 INFO L87 Difference]: Start difference. First operand 175 states and 389 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:16,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:16,540 INFO L93 Difference]: Finished difference Result 242 states and 511 transitions. [2021-06-05 21:55:16,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:55:16,540 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:16,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:16,541 INFO L225 Difference]: With dead ends: 242 [2021-06-05 21:55:16,541 INFO L226 Difference]: Without dead ends: 242 [2021-06-05 21:55:16,541 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 456.1ms TimeCoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:55:16,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-06-05 21:55:16,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 174. [2021-06-05 21:55:16,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.2369942196531793) internal successors, (387), 173 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:16,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 387 transitions. [2021-06-05 21:55:16,542 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 387 transitions. Word has length 19 [2021-06-05 21:55:16,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:16,542 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 387 transitions. [2021-06-05 21:55:16,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:16,543 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 387 transitions. [2021-06-05 21:55:16,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:16,543 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:16,543 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:16,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1778 [2021-06-05 21:55:16,743 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:16,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:16,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1389377720, now seen corresponding path program 337 times [2021-06-05 21:55:16,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:16,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416448430] [2021-06-05 21:55:16,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:16,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:16,840 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:16,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:16,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416448430] [2021-06-05 21:55:16,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416448430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:16,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487236452] [2021-06-05 21:55:16,841 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:16,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:16,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:55:16,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:16,972 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:16,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487236452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:16,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:16,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:55:16,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551200160] [2021-06-05 21:55:16,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:55:16,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:16,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:55:16,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:55:16,972 INFO L87 Difference]: Start difference. First operand 174 states and 387 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:17,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:17,263 INFO L93 Difference]: Finished difference Result 183 states and 400 transitions. [2021-06-05 21:55:17,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:55:17,264 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:17,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:17,264 INFO L225 Difference]: With dead ends: 183 [2021-06-05 21:55:17,264 INFO L226 Difference]: Without dead ends: 179 [2021-06-05 21:55:17,264 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 321.2ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:55:17,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-06-05 21:55:17,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 174. [2021-06-05 21:55:17,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.23121387283237) internal successors, (386), 173 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:17,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 386 transitions. [2021-06-05 21:55:17,266 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 386 transitions. Word has length 19 [2021-06-05 21:55:17,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:17,266 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 386 transitions. [2021-06-05 21:55:17,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:17,266 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 386 transitions. [2021-06-05 21:55:17,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:17,266 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:17,266 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:17,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1781 [2021-06-05 21:55:17,467 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:17,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:17,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1476258954, now seen corresponding path program 338 times [2021-06-05 21:55:17,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:17,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433034918] [2021-06-05 21:55:17,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:17,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:17,559 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:17,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:17,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433034918] [2021-06-05 21:55:17,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433034918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:17,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296887322] [2021-06-05 21:55:17,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:17,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:55:17,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:17,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:55:17,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:17,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:17,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:17,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:17,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:17,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:17,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:17,691 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:17,711 INFO L628 ElimStorePlain]: treesize reduction 30, result has 43.4 percent of original size [2021-06-05 21:55:17,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:17,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 21:55:17,714 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:55:17,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:55:17,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:55:17,724 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-06-05 21:55:17,743 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:17,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296887322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:17,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:17,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:17,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423775823] [2021-06-05 21:55:17,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:17,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:17,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:17,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:17,745 INFO L87 Difference]: Start difference. First operand 174 states and 386 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:17,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:17,962 INFO L93 Difference]: Finished difference Result 204 states and 443 transitions. [2021-06-05 21:55:17,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:55:17,962 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:17,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:17,962 INFO L225 Difference]: With dead ends: 204 [2021-06-05 21:55:17,962 INFO L226 Difference]: Without dead ends: 204 [2021-06-05 21:55:17,963 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 266.5ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:55:17,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-06-05 21:55:17,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 167. [2021-06-05 21:55:17,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.2289156626506026) internal successors, (370), 166 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:17,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 370 transitions. [2021-06-05 21:55:17,964 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 370 transitions. Word has length 19 [2021-06-05 21:55:17,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:17,964 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 370 transitions. [2021-06-05 21:55:17,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:17,964 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 370 transitions. [2021-06-05 21:55:17,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:17,964 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:17,964 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:18,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1785 [2021-06-05 21:55:18,165 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:18,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:18,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1376514694, now seen corresponding path program 339 times [2021-06-05 21:55:18,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:18,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593320268] [2021-06-05 21:55:18,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:18,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:18,269 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:18,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:18,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593320268] [2021-06-05 21:55:18,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593320268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:18,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244315572] [2021-06-05 21:55:18,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:18,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:55:18,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:18,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:55:18,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:18,442 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:18,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244315572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:18,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:18,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:18,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226874651] [2021-06-05 21:55:18,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:18,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:18,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:18,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:18,443 INFO L87 Difference]: Start difference. First operand 167 states and 370 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:18,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:18,903 INFO L93 Difference]: Finished difference Result 208 states and 443 transitions. [2021-06-05 21:55:18,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:55:18,903 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:18,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:18,903 INFO L225 Difference]: With dead ends: 208 [2021-06-05 21:55:18,903 INFO L226 Difference]: Without dead ends: 208 [2021-06-05 21:55:18,904 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 441.1ms TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:55:18,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-06-05 21:55:18,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 170. [2021-06-05 21:55:18,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.2366863905325443) internal successors, (378), 169 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:18,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 378 transitions. [2021-06-05 21:55:18,905 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 378 transitions. Word has length 19 [2021-06-05 21:55:18,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:18,905 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 378 transitions. [2021-06-05 21:55:18,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:18,905 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 378 transitions. [2021-06-05 21:55:18,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:18,906 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:18,906 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:19,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1786 [2021-06-05 21:55:19,106 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:19,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:19,106 INFO L82 PathProgramCache]: Analyzing trace with hash -908266892, now seen corresponding path program 340 times [2021-06-05 21:55:19,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:19,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776561575] [2021-06-05 21:55:19,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:19,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:19,190 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:19,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:19,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776561575] [2021-06-05 21:55:19,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776561575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:19,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941941223] [2021-06-05 21:55:19,190 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:19,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:55:19,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:19,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:55:19,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:19,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:19,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:19,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:55:19,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:19,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:19,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:19,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:55:19,335 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:19,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:19,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:19,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:55:19,339 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:19,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:19,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:19,347 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:19,379 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 21:55:19,379 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:55:19,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:55:19,380 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 21:55:19,406 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:19,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941941223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:19,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:19,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:55:19,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334844962] [2021-06-05 21:55:19,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:55:19,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:19,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:55:19,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:55:19,406 INFO L87 Difference]: Start difference. First operand 170 states and 378 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:20,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:20,025 INFO L93 Difference]: Finished difference Result 262 states and 551 transitions. [2021-06-05 21:55:20,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:55:20,025 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:20,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:20,025 INFO L225 Difference]: With dead ends: 262 [2021-06-05 21:55:20,025 INFO L226 Difference]: Without dead ends: 262 [2021-06-05 21:55:20,026 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 581.2ms TimeCoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:55:20,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-05 21:55:20,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 172. [2021-06-05 21:55:20,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.257309941520468) internal successors, (386), 171 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:20,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 386 transitions. [2021-06-05 21:55:20,027 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 386 transitions. Word has length 19 [2021-06-05 21:55:20,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:20,027 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 386 transitions. [2021-06-05 21:55:20,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:20,027 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 386 transitions. [2021-06-05 21:55:20,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:20,028 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:20,028 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:20,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1796 [2021-06-05 21:55:20,228 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:20,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:20,228 INFO L82 PathProgramCache]: Analyzing trace with hash 503579440, now seen corresponding path program 341 times [2021-06-05 21:55:20,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:20,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57294108] [2021-06-05 21:55:20,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:20,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:20,324 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:20,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:20,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57294108] [2021-06-05 21:55:20,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57294108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:20,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471405116] [2021-06-05 21:55:20,324 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:20,350 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:55:20,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:20,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:55:20,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:20,475 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:20,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471405116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:20,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:20,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:55:20,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47116531] [2021-06-05 21:55:20,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:55:20,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:20,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:55:20,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:55:20,476 INFO L87 Difference]: Start difference. First operand 172 states and 386 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:20,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:20,886 INFO L93 Difference]: Finished difference Result 185 states and 405 transitions. [2021-06-05 21:55:20,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:55:20,886 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:20,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:20,886 INFO L225 Difference]: With dead ends: 185 [2021-06-05 21:55:20,887 INFO L226 Difference]: Without dead ends: 181 [2021-06-05 21:55:20,887 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 429.1ms TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:55:20,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-06-05 21:55:20,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 172. [2021-06-05 21:55:20,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.2514619883040936) internal successors, (385), 171 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:20,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 385 transitions. [2021-06-05 21:55:20,888 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 385 transitions. Word has length 19 [2021-06-05 21:55:20,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:20,888 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 385 transitions. [2021-06-05 21:55:20,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:20,888 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 385 transitions. [2021-06-05 21:55:20,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:20,888 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:20,889 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:21,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1806,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:21,089 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:21,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:21,089 INFO L82 PathProgramCache]: Analyzing trace with hash 590460674, now seen corresponding path program 342 times [2021-06-05 21:55:21,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:21,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118231917] [2021-06-05 21:55:21,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:21,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:21,167 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:21,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:21,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118231917] [2021-06-05 21:55:21,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118231917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:21,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925099708] [2021-06-05 21:55:21,167 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:21,192 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:55:21,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:21,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:55:21,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:21,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:21,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:21,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:55:21,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:21,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:21,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:55:21,311 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:21,325 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-06-05 21:55:21,325 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:55:21,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:55:21,325 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-06-05 21:55:21,331 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:21,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925099708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:21,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:21,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:55:21,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97762419] [2021-06-05 21:55:21,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:55:21,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:21,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:55:21,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:55:21,332 INFO L87 Difference]: Start difference. First operand 172 states and 385 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:21,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:21,759 INFO L93 Difference]: Finished difference Result 217 states and 469 transitions. [2021-06-05 21:55:21,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:55:21,759 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:21,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:21,760 INFO L225 Difference]: With dead ends: 217 [2021-06-05 21:55:21,760 INFO L226 Difference]: Without dead ends: 217 [2021-06-05 21:55:21,760 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 403.8ms TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:55:21,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-06-05 21:55:21,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 171. [2021-06-05 21:55:21,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.2529411764705882) internal successors, (383), 170 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:21,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 383 transitions. [2021-06-05 21:55:21,761 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 383 transitions. Word has length 19 [2021-06-05 21:55:21,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:21,761 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 383 transitions. [2021-06-05 21:55:21,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:21,761 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 383 transitions. [2021-06-05 21:55:21,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:21,762 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:21,762 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:21,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1810 [2021-06-05 21:55:21,962 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:21,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:21,962 INFO L82 PathProgramCache]: Analyzing trace with hash -2766826, now seen corresponding path program 343 times [2021-06-05 21:55:21,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:21,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459478856] [2021-06-05 21:55:21,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:21,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:22,078 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:22,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:22,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459478856] [2021-06-05 21:55:22,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459478856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:22,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105824576] [2021-06-05 21:55:22,079 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:22,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:22,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:55:22,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:22,222 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:22,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105824576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:22,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:22,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:55:22,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413635708] [2021-06-05 21:55:22,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:55:22,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:22,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:55:22,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:55:22,223 INFO L87 Difference]: Start difference. First operand 171 states and 383 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:22,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:22,473 INFO L93 Difference]: Finished difference Result 182 states and 399 transitions. [2021-06-05 21:55:22,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:55:22,473 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:22,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:22,474 INFO L225 Difference]: With dead ends: 182 [2021-06-05 21:55:22,474 INFO L226 Difference]: Without dead ends: 176 [2021-06-05 21:55:22,474 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 306.9ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:55:22,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-06-05 21:55:22,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 171. [2021-06-05 21:55:22,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.2470588235294118) internal successors, (382), 170 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:22,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 382 transitions. [2021-06-05 21:55:22,475 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 382 transitions. Word has length 19 [2021-06-05 21:55:22,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:22,475 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 382 transitions. [2021-06-05 21:55:22,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:22,475 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 382 transitions. [2021-06-05 21:55:22,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:22,476 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:22,476 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:22,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1814,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:22,676 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:22,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:22,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1516323446, now seen corresponding path program 344 times [2021-06-05 21:55:22,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:22,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633057] [2021-06-05 21:55:22,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:22,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:22,821 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:22,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:22,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633057] [2021-06-05 21:55:22,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:22,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913286185] [2021-06-05 21:55:22,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:22,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:55:22,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:22,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:55:22,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:22,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:22,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:22,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:22,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:22,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:22,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:22,955 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:22,973 INFO L628 ElimStorePlain]: treesize reduction 36, result has 32.1 percent of original size [2021-06-05 21:55:22,973 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:55:22,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:55:22,973 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-06-05 21:55:22,993 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:22,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913286185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:22,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:22,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:22,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245612486] [2021-06-05 21:55:22,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:22,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:22,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:22,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:22,993 INFO L87 Difference]: Start difference. First operand 171 states and 382 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:23,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:23,206 INFO L93 Difference]: Finished difference Result 202 states and 438 transitions. [2021-06-05 21:55:23,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:55:23,206 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:23,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:23,207 INFO L225 Difference]: With dead ends: 202 [2021-06-05 21:55:23,207 INFO L226 Difference]: Without dead ends: 202 [2021-06-05 21:55:23,207 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 299.5ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:55:23,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-05 21:55:23,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 168. [2021-06-05 21:55:23,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.2275449101796405) internal successors, (372), 167 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:23,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 372 transitions. [2021-06-05 21:55:23,208 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 372 transitions. Word has length 19 [2021-06-05 21:55:23,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:23,208 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 372 transitions. [2021-06-05 21:55:23,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:23,209 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 372 transitions. [2021-06-05 21:55:23,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:23,209 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:23,209 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:23,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1818,345 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:23,409 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:23,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:23,409 INFO L82 PathProgramCache]: Analyzing trace with hash -954493294, now seen corresponding path program 345 times [2021-06-05 21:55:23,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:23,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712677306] [2021-06-05 21:55:23,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:23,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:23,490 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:23,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:23,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712677306] [2021-06-05 21:55:23,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712677306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:23,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917917702] [2021-06-05 21:55:23,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:23,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:55:23,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:23,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:55:23,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:23,681 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:23,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917917702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:23,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:23,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:55:23,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279605624] [2021-06-05 21:55:23,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:55:23,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:23,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:55:23,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:55:23,681 INFO L87 Difference]: Start difference. First operand 168 states and 372 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:23,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:23,808 INFO L93 Difference]: Finished difference Result 187 states and 410 transitions. [2021-06-05 21:55:23,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:55:23,808 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:23,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:23,809 INFO L225 Difference]: With dead ends: 187 [2021-06-05 21:55:23,809 INFO L226 Difference]: Without dead ends: 187 [2021-06-05 21:55:23,809 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 187.3ms TimeCoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:55:23,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-06-05 21:55:23,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 168. [2021-06-05 21:55:23,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.2275449101796405) internal successors, (372), 167 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:23,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 372 transitions. [2021-06-05 21:55:23,810 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 372 transitions. Word has length 19 [2021-06-05 21:55:23,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:23,810 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 372 transitions. [2021-06-05 21:55:23,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:23,810 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 372 transitions. [2021-06-05 21:55:23,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:23,811 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:23,811 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:24,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1819 [2021-06-05 21:55:24,011 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:24,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:24,011 INFO L82 PathProgramCache]: Analyzing trace with hash -887938366, now seen corresponding path program 346 times [2021-06-05 21:55:24,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:24,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979746420] [2021-06-05 21:55:24,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:24,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:24,090 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:24,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:24,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979746420] [2021-06-05 21:55:24,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979746420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:24,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480877232] [2021-06-05 21:55:24,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:24,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:55:24,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:24,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:55:24,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:24,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:24,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:24,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:24,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:24,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:24,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:24,284 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:24,300 INFO L628 ElimStorePlain]: treesize reduction 36, result has 29.4 percent of original size [2021-06-05 21:55:24,300 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:55:24,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:55:24,301 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 21:55:24,318 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:24,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480877232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:24,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:24,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:55:24,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844551344] [2021-06-05 21:55:24,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:55:24,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:24,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:55:24,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:55:24,319 INFO L87 Difference]: Start difference. First operand 168 states and 372 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:24,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:24,644 INFO L93 Difference]: Finished difference Result 207 states and 450 transitions. [2021-06-05 21:55:24,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:55:24,645 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:24,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:24,645 INFO L225 Difference]: With dead ends: 207 [2021-06-05 21:55:24,645 INFO L226 Difference]: Without dead ends: 207 [2021-06-05 21:55:24,645 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 403.1ms TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:55:24,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-06-05 21:55:24,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 168. [2021-06-05 21:55:24,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.2275449101796405) internal successors, (372), 167 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:24,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 372 transitions. [2021-06-05 21:55:24,647 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 372 transitions. Word has length 19 [2021-06-05 21:55:24,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:24,647 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 372 transitions. [2021-06-05 21:55:24,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:24,647 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 372 transitions. [2021-06-05 21:55:24,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:24,647 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:24,647 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:24,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1823 [2021-06-05 21:55:24,848 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:24,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:24,848 INFO L82 PathProgramCache]: Analyzing trace with hash -2132717422, now seen corresponding path program 347 times [2021-06-05 21:55:24,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:24,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806958402] [2021-06-05 21:55:24,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:24,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:24,933 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:24,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:24,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806958402] [2021-06-05 21:55:24,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806958402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:24,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432899522] [2021-06-05 21:55:24,934 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:24,959 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:55:24,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:24,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:55:24,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:25,146 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:25,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432899522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:25,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:25,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:25,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911978764] [2021-06-05 21:55:25,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:25,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:25,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:25,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:25,147 INFO L87 Difference]: Start difference. First operand 168 states and 372 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:25,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:25,684 INFO L93 Difference]: Finished difference Result 219 states and 473 transitions. [2021-06-05 21:55:25,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:55:25,684 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:25,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:25,684 INFO L225 Difference]: With dead ends: 219 [2021-06-05 21:55:25,684 INFO L226 Difference]: Without dead ends: 219 [2021-06-05 21:55:25,684 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 520.6ms TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:55:25,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-06-05 21:55:25,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 168. [2021-06-05 21:55:25,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.2275449101796405) internal successors, (372), 167 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:25,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 372 transitions. [2021-06-05 21:55:25,686 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 372 transitions. Word has length 19 [2021-06-05 21:55:25,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:25,686 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 372 transitions. [2021-06-05 21:55:25,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:25,686 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 372 transitions. [2021-06-05 21:55:25,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:25,686 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:25,686 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:25,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1825,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:25,887 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:25,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:25,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1152264386, now seen corresponding path program 348 times [2021-06-05 21:55:25,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:25,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158710982] [2021-06-05 21:55:25,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:25,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:25,984 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:25,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:25,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158710982] [2021-06-05 21:55:25,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158710982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:25,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242450173] [2021-06-05 21:55:25,984 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:26,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:55:26,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:26,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:55:26,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:26,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:26,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:26,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:55:26,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:26,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:26,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:55:26,203 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:26,248 INFO L628 ElimStorePlain]: treesize reduction 72, result has 41.5 percent of original size [2021-06-05 21:55:26,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:26,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:55:26,252 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:55:26,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:55:26,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 21:55:26,273 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:26,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:55:26,288 INFO L518 ElimStorePlain]: Eliminatee v_prenex_312 vanished before elimination [2021-06-05 21:55:26,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:55:26,290 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-06-05 21:55:26,344 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:26,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242450173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:26,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:26,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:55:26,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962110014] [2021-06-05 21:55:26,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:55:26,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:26,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:55:26,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:55:26,345 INFO L87 Difference]: Start difference. First operand 168 states and 372 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:26,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:26,891 INFO L93 Difference]: Finished difference Result 224 states and 483 transitions. [2021-06-05 21:55:26,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:55:26,891 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:26,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:26,891 INFO L225 Difference]: With dead ends: 224 [2021-06-05 21:55:26,891 INFO L226 Difference]: Without dead ends: 224 [2021-06-05 21:55:26,892 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 597.9ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:55:26,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-06-05 21:55:26,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 168. [2021-06-05 21:55:26,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.2275449101796405) internal successors, (372), 167 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:26,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 372 transitions. [2021-06-05 21:55:26,893 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 372 transitions. Word has length 19 [2021-06-05 21:55:26,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:26,893 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 372 transitions. [2021-06-05 21:55:26,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:26,893 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 372 transitions. [2021-06-05 21:55:26,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:26,893 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:26,894 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:27,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1829,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:27,094 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:27,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:27,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1132517200, now seen corresponding path program 349 times [2021-06-05 21:55:27,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:27,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498244005] [2021-06-05 21:55:27,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:27,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:27,198 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:27,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:27,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498244005] [2021-06-05 21:55:27,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498244005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:27,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296759258] [2021-06-05 21:55:27,198 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:27,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:27,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:55:27,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:27,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:27,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:27,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:55:27,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:27,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:27,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:55:27,399 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:27,437 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-06-05 21:55:27,437 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:55:27,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 21:55:27,440 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:27,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:55:27,453 INFO L518 ElimStorePlain]: Eliminatee v_prenex_315 vanished before elimination [2021-06-05 21:55:27,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:55:27,453 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 21:55:27,482 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:27,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296759258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:27,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:27,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:27,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167058000] [2021-06-05 21:55:27,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:27,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:27,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:27,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:27,483 INFO L87 Difference]: Start difference. First operand 168 states and 372 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:27,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:27,893 INFO L93 Difference]: Finished difference Result 186 states and 406 transitions. [2021-06-05 21:55:27,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:55:27,893 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:27,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:27,893 INFO L225 Difference]: With dead ends: 186 [2021-06-05 21:55:27,893 INFO L226 Difference]: Without dead ends: 186 [2021-06-05 21:55:27,893 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 455.8ms TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:55:27,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-06-05 21:55:27,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 161. [2021-06-05 21:55:27,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.2) internal successors, (352), 160 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:27,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 352 transitions. [2021-06-05 21:55:27,895 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 352 transitions. Word has length 19 [2021-06-05 21:55:27,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:27,895 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 352 transitions. [2021-06-05 21:55:27,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:27,895 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 352 transitions. [2021-06-05 21:55:27,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:27,895 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:27,895 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:28,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1833 [2021-06-05 21:55:28,096 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:28,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:28,096 INFO L82 PathProgramCache]: Analyzing trace with hash -2128105322, now seen corresponding path program 350 times [2021-06-05 21:55:28,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:28,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119732570] [2021-06-05 21:55:28,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:28,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:28,180 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:28,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:28,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119732570] [2021-06-05 21:55:28,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119732570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:28,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066699744] [2021-06-05 21:55:28,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:28,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:55:28,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:28,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:55:28,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:28,365 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:28,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066699744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:28,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:28,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:28,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524561725] [2021-06-05 21:55:28,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:28,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:28,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:28,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:28,366 INFO L87 Difference]: Start difference. First operand 161 states and 352 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:28,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:28,566 INFO L93 Difference]: Finished difference Result 174 states and 373 transitions. [2021-06-05 21:55:28,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:55:28,567 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:28,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:28,567 INFO L225 Difference]: With dead ends: 174 [2021-06-05 21:55:28,567 INFO L226 Difference]: Without dead ends: 165 [2021-06-05 21:55:28,567 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 246.9ms TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:55:28,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-06-05 21:55:28,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 161. [2021-06-05 21:55:28,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.2) internal successors, (352), 160 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:28,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 352 transitions. [2021-06-05 21:55:28,569 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 352 transitions. Word has length 19 [2021-06-05 21:55:28,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:28,569 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 352 transitions. [2021-06-05 21:55:28,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:28,569 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 352 transitions. [2021-06-05 21:55:28,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:28,569 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:28,569 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:28,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1840 [2021-06-05 21:55:28,769 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:28,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:28,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1717086026, now seen corresponding path program 351 times [2021-06-05 21:55:28,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:28,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880408010] [2021-06-05 21:55:28,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:28,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:28,844 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:28,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:28,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880408010] [2021-06-05 21:55:28,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880408010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:28,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115879767] [2021-06-05 21:55:28,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:28,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:55:28,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:28,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:55:28,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:29,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:29,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:29,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:29,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:29,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:29,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:29,016 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:29,032 INFO L628 ElimStorePlain]: treesize reduction 36, result has 29.4 percent of original size [2021-06-05 21:55:29,032 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:55:29,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:55:29,033 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 21:55:29,052 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:29,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115879767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:29,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:29,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:55:29,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254514173] [2021-06-05 21:55:29,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:55:29,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:29,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:55:29,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:55:29,053 INFO L87 Difference]: Start difference. First operand 161 states and 352 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:29,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:29,269 INFO L93 Difference]: Finished difference Result 192 states and 414 transitions. [2021-06-05 21:55:29,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:55:29,270 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:29,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:29,270 INFO L225 Difference]: With dead ends: 192 [2021-06-05 21:55:29,270 INFO L226 Difference]: Without dead ends: 192 [2021-06-05 21:55:29,270 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 201.6ms TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:55:29,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-06-05 21:55:29,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 162. [2021-06-05 21:55:29,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.198757763975155) internal successors, (354), 161 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:29,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 354 transitions. [2021-06-05 21:55:29,271 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 354 transitions. Word has length 19 [2021-06-05 21:55:29,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:29,272 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 354 transitions. [2021-06-05 21:55:29,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:29,272 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 354 transitions. [2021-06-05 21:55:29,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:29,272 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:29,272 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:29,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1845,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:29,472 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:29,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:29,473 INFO L82 PathProgramCache]: Analyzing trace with hash 472306970, now seen corresponding path program 352 times [2021-06-05 21:55:29,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:29,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954033352] [2021-06-05 21:55:29,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:29,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:29,550 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:29,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:29,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954033352] [2021-06-05 21:55:29,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954033352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:29,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875212662] [2021-06-05 21:55:29,550 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:29,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:55:29,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:29,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:55:29,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:29,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:29,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:29,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:29,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:29,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:29,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:29,745 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:29,771 INFO L628 ElimStorePlain]: treesize reduction 38, result has 28.3 percent of original size [2021-06-05 21:55:29,771 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:55:29,772 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:55:29,772 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 21:55:29,790 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:29,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875212662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:29,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:29,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:55:29,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954509542] [2021-06-05 21:55:29,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:55:29,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:29,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:55:29,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:55:29,791 INFO L87 Difference]: Start difference. First operand 162 states and 354 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:30,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:30,233 INFO L93 Difference]: Finished difference Result 208 states and 446 transitions. [2021-06-05 21:55:30,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:55:30,233 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:30,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:30,234 INFO L225 Difference]: With dead ends: 208 [2021-06-05 21:55:30,234 INFO L226 Difference]: Without dead ends: 208 [2021-06-05 21:55:30,234 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 485.0ms TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:55:30,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-06-05 21:55:30,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 163. [2021-06-05 21:55:30,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.197530864197531) internal successors, (356), 162 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:30,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 356 transitions. [2021-06-05 21:55:30,236 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 356 transitions. Word has length 19 [2021-06-05 21:55:30,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:30,236 INFO L482 AbstractCegarLoop]: Abstraction has 163 states and 356 transitions. [2021-06-05 21:55:30,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:30,236 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 356 transitions. [2021-06-05 21:55:30,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:30,236 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:30,236 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:30,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1847,353 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:30,436 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:30,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:30,437 INFO L82 PathProgramCache]: Analyzing trace with hash 112390452, now seen corresponding path program 353 times [2021-06-05 21:55:30,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:30,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115695263] [2021-06-05 21:55:30,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:30,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:30,532 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:30,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:30,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115695263] [2021-06-05 21:55:30,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115695263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:30,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270811412] [2021-06-05 21:55:30,533 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:30,562 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:55:30,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:30,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:55:30,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:30,741 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:30,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270811412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:30,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:30,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:30,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196657894] [2021-06-05 21:55:30,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:30,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:30,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:30,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:30,742 INFO L87 Difference]: Start difference. First operand 163 states and 356 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:31,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:31,187 INFO L93 Difference]: Finished difference Result 224 states and 479 transitions. [2021-06-05 21:55:31,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:55:31,187 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:31,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:31,187 INFO L225 Difference]: With dead ends: 224 [2021-06-05 21:55:31,187 INFO L226 Difference]: Without dead ends: 224 [2021-06-05 21:55:31,187 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 471.0ms TimeCoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:55:31,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-06-05 21:55:31,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 164. [2021-06-05 21:55:31,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.196319018404908) internal successors, (358), 163 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:31,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 358 transitions. [2021-06-05 21:55:31,189 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 358 transitions. Word has length 19 [2021-06-05 21:55:31,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:31,189 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 358 transitions. [2021-06-05 21:55:31,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:31,189 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 358 transitions. [2021-06-05 21:55:31,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:31,189 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:31,189 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:31,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1849,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:31,391 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:31,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:31,391 INFO L82 PathProgramCache]: Analyzing trace with hash 822438222, now seen corresponding path program 354 times [2021-06-05 21:55:31,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:31,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859595015] [2021-06-05 21:55:31,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:31,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:31,503 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:31,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:31,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859595015] [2021-06-05 21:55:31,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859595015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:31,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749599991] [2021-06-05 21:55:31,504 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:31,534 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:55:31,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:31,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:55:31,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:31,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:31,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:31,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:31,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:31,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:31,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:55:31,703 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:31,763 INFO L628 ElimStorePlain]: treesize reduction 74, result has 41.7 percent of original size [2021-06-05 21:55:31,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:31,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 21:55:31,767 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:55:31,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:55:31,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 21:55:31,794 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:31,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:55:31,809 INFO L518 ElimStorePlain]: Eliminatee v_prenex_320 vanished before elimination [2021-06-05 21:55:31,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:55:31,810 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-06-05 21:55:31,858 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:31,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749599991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:31,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:31,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:55:31,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348300668] [2021-06-05 21:55:31,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:55:31,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:31,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:55:31,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:55:31,859 INFO L87 Difference]: Start difference. First operand 164 states and 358 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:32,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:32,149 INFO L93 Difference]: Finished difference Result 181 states and 392 transitions. [2021-06-05 21:55:32,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:55:32,149 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:32,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:32,149 INFO L225 Difference]: With dead ends: 181 [2021-06-05 21:55:32,149 INFO L226 Difference]: Without dead ends: 181 [2021-06-05 21:55:32,150 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 347.4ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:55:32,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-06-05 21:55:32,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 158. [2021-06-05 21:55:32,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.2038216560509554) internal successors, (346), 157 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:32,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 346 transitions. [2021-06-05 21:55:32,151 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 346 transitions. Word has length 19 [2021-06-05 21:55:32,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:32,151 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 346 transitions. [2021-06-05 21:55:32,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:32,151 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 346 transitions. [2021-06-05 21:55:32,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:32,151 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:32,151 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:32,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1859,355 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:32,352 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:32,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:32,352 INFO L82 PathProgramCache]: Analyzing trace with hash 330970698, now seen corresponding path program 355 times [2021-06-05 21:55:32,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:32,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152425576] [2021-06-05 21:55:32,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:32,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:32,426 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:32,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:32,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152425576] [2021-06-05 21:55:32,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152425576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:32,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069380373] [2021-06-05 21:55:32,427 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:32,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:32,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:55:32,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:32,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:32,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:32,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:32,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:32,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:32,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:32,613 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:32,630 INFO L628 ElimStorePlain]: treesize reduction 34, result has 30.6 percent of original size [2021-06-05 21:55:32,630 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:55:32,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:55:32,631 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 21:55:32,648 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:32,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069380373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:32,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:32,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:55:32,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641350477] [2021-06-05 21:55:32,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:55:32,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:32,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:55:32,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:55:32,649 INFO L87 Difference]: Start difference. First operand 158 states and 346 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:32,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:32,846 INFO L93 Difference]: Finished difference Result 190 states and 410 transitions. [2021-06-05 21:55:32,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:55:32,846 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:32,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:32,846 INFO L225 Difference]: With dead ends: 190 [2021-06-05 21:55:32,846 INFO L226 Difference]: Without dead ends: 190 [2021-06-05 21:55:32,846 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 187.9ms TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:55:32,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-06-05 21:55:32,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 158. [2021-06-05 21:55:32,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.2038216560509554) internal successors, (346), 157 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:32,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 346 transitions. [2021-06-05 21:55:32,848 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 346 transitions. Word has length 19 [2021-06-05 21:55:32,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:32,848 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 346 transitions. [2021-06-05 21:55:32,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:32,848 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 346 transitions. [2021-06-05 21:55:32,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:32,848 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:32,848 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:33,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1865,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:33,049 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:33,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:33,049 INFO L82 PathProgramCache]: Analyzing trace with hash -913808358, now seen corresponding path program 356 times [2021-06-05 21:55:33,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:33,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103354536] [2021-06-05 21:55:33,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:33,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:33,133 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:33,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:33,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103354536] [2021-06-05 21:55:33,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103354536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:33,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058746607] [2021-06-05 21:55:33,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:33,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:55:33,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:33,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:55:33,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:33,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:33,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:33,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:33,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:33,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:33,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:33,324 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:33,340 INFO L628 ElimStorePlain]: treesize reduction 36, result has 29.4 percent of original size [2021-06-05 21:55:33,340 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:55:33,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:55:33,341 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 21:55:33,359 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:33,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058746607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:33,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:33,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:55:33,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381002879] [2021-06-05 21:55:33,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:55:33,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:33,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:55:33,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:55:33,361 INFO L87 Difference]: Start difference. First operand 158 states and 346 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:33,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:33,707 INFO L93 Difference]: Finished difference Result 209 states and 448 transitions. [2021-06-05 21:55:33,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:55:33,707 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:33,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:33,707 INFO L225 Difference]: With dead ends: 209 [2021-06-05 21:55:33,707 INFO L226 Difference]: Without dead ends: 209 [2021-06-05 21:55:33,707 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 380.4ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:55:33,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-06-05 21:55:33,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 159. [2021-06-05 21:55:33,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.2025316455696204) internal successors, (348), 158 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:33,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 348 transitions. [2021-06-05 21:55:33,709 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 348 transitions. Word has length 19 [2021-06-05 21:55:33,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:33,709 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 348 transitions. [2021-06-05 21:55:33,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:33,709 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 348 transitions. [2021-06-05 21:55:33,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:33,709 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:33,709 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:33,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1867 [2021-06-05 21:55:33,910 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:33,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:33,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1923793846, now seen corresponding path program 357 times [2021-06-05 21:55:33,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:33,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12341172] [2021-06-05 21:55:33,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:33,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:33,986 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:33,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:33,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12341172] [2021-06-05 21:55:33,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12341172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:33,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848738537] [2021-06-05 21:55:33,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:34,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:55:34,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:34,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:55:34,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:34,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:34,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:34,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:34,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:34,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:34,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:34,164 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:34,211 INFO L628 ElimStorePlain]: treesize reduction 72, result has 39.5 percent of original size [2021-06-05 21:55:34,211 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:55:34,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:34,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:55:34,214 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:34,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:55:34,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:34,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:55:34,234 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:55:34,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:55:34,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:55:34,251 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-06-05 21:55:34,306 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:34,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848738537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:34,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:34,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:55:34,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693677688] [2021-06-05 21:55:34,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:55:34,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:34,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:55:34,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:55:34,307 INFO L87 Difference]: Start difference. First operand 159 states and 348 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:34,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:34,702 INFO L93 Difference]: Finished difference Result 223 states and 476 transitions. [2021-06-05 21:55:34,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:55:34,702 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:34,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:34,702 INFO L225 Difference]: With dead ends: 223 [2021-06-05 21:55:34,702 INFO L226 Difference]: Without dead ends: 223 [2021-06-05 21:55:34,703 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 417.1ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:55:34,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-06-05 21:55:34,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 160. [2021-06-05 21:55:34,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.20125786163522) internal successors, (350), 159 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:34,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 350 transitions. [2021-06-05 21:55:34,704 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 350 transitions. Word has length 19 [2021-06-05 21:55:34,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:34,704 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 350 transitions. [2021-06-05 21:55:34,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:34,704 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 350 transitions. [2021-06-05 21:55:34,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:34,704 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:34,704 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:34,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1869,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:34,905 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:34,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:34,905 INFO L82 PathProgramCache]: Analyzing trace with hash -563677106, now seen corresponding path program 358 times [2021-06-05 21:55:34,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:34,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497489384] [2021-06-05 21:55:34,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:34,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:35,009 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:35,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:35,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497489384] [2021-06-05 21:55:35,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497489384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:35,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85495118] [2021-06-05 21:55:35,009 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:35,035 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:55:35,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:35,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:55:35,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:35,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:35,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:35,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:55:35,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:35,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:35,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:55:35,189 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:35,228 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-06-05 21:55:35,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 21:55:35,231 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:35,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:55:35,243 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:55:35,243 INFO L518 ElimStorePlain]: Eliminatee v_prenex_326 vanished before elimination [2021-06-05 21:55:35,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:55:35,244 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 21:55:35,273 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:35,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85495118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:35,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:35,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:35,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550644578] [2021-06-05 21:55:35,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:35,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:35,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:35,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:35,274 INFO L87 Difference]: Start difference. First operand 160 states and 350 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:35,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:35,738 INFO L93 Difference]: Finished difference Result 183 states and 396 transitions. [2021-06-05 21:55:35,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:55:35,739 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:35,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:35,739 INFO L225 Difference]: With dead ends: 183 [2021-06-05 21:55:35,739 INFO L226 Difference]: Without dead ends: 183 [2021-06-05 21:55:35,739 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 420.8ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:55:35,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-05 21:55:35,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 157. [2021-06-05 21:55:35,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.2051282051282053) internal successors, (344), 156 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:35,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 344 transitions. [2021-06-05 21:55:35,740 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 344 transitions. Word has length 19 [2021-06-05 21:55:35,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:35,741 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 344 transitions. [2021-06-05 21:55:35,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:35,741 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 344 transitions. [2021-06-05 21:55:35,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:35,741 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:35,741 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:35,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1873 [2021-06-05 21:55:35,941 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:35,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:35,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1799606638, now seen corresponding path program 359 times [2021-06-05 21:55:35,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:35,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254484545] [2021-06-05 21:55:35,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:35,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:36,026 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:36,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:36,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254484545] [2021-06-05 21:55:36,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254484545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:36,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337211858] [2021-06-05 21:55:36,026 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:36,054 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:55:36,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:36,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:55:36,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:36,253 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:36,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337211858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:36,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:36,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:55:36,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667877794] [2021-06-05 21:55:36,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:55:36,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:36,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:55:36,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:55:36,254 INFO L87 Difference]: Start difference. First operand 157 states and 344 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:36,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:36,422 INFO L93 Difference]: Finished difference Result 193 states and 416 transitions. [2021-06-05 21:55:36,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:55:36,422 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:36,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:36,423 INFO L225 Difference]: With dead ends: 193 [2021-06-05 21:55:36,423 INFO L226 Difference]: Without dead ends: 193 [2021-06-05 21:55:36,423 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 236.3ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:55:36,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-06-05 21:55:36,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 157. [2021-06-05 21:55:36,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.2051282051282053) internal successors, (344), 156 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:36,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 344 transitions. [2021-06-05 21:55:36,424 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 344 transitions. Word has length 19 [2021-06-05 21:55:36,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:36,424 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 344 transitions. [2021-06-05 21:55:36,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:36,424 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 344 transitions. [2021-06-05 21:55:36,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:36,425 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:36,425 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:36,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1880,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:36,625 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:36,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:36,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1485375170, now seen corresponding path program 360 times [2021-06-05 21:55:36,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:36,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818130952] [2021-06-05 21:55:36,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:36,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:36,729 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:36,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:36,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818130952] [2021-06-05 21:55:36,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818130952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:36,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237429594] [2021-06-05 21:55:36,730 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:36,757 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:55:36,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:36,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:55:36,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:36,959 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:36,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237429594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:36,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:36,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:55:36,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591123501] [2021-06-05 21:55:36,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:55:36,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:36,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:55:36,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:55:36,960 INFO L87 Difference]: Start difference. First operand 157 states and 344 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:37,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:37,265 INFO L93 Difference]: Finished difference Result 218 states and 466 transitions. [2021-06-05 21:55:37,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:55:37,266 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:37,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:37,266 INFO L225 Difference]: With dead ends: 218 [2021-06-05 21:55:37,266 INFO L226 Difference]: Without dead ends: 218 [2021-06-05 21:55:37,266 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 400.1ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:55:37,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-06-05 21:55:37,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 158. [2021-06-05 21:55:37,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.2038216560509554) internal successors, (346), 157 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:37,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 346 transitions. [2021-06-05 21:55:37,268 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 346 transitions. Word has length 19 [2021-06-05 21:55:37,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:37,268 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 346 transitions. [2021-06-05 21:55:37,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:37,268 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 346 transitions. [2021-06-05 21:55:37,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:37,268 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:37,268 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:37,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1884 [2021-06-05 21:55:37,469 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:37,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:37,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1449475386, now seen corresponding path program 361 times [2021-06-05 21:55:37,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:37,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222807746] [2021-06-05 21:55:37,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:37,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:37,558 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:37,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:37,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222807746] [2021-06-05 21:55:37,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222807746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:37,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198437036] [2021-06-05 21:55:37,559 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:37,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:37,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:55:37,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:37,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:37,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:37,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:55:37,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:37,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:37,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:55:37,726 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:37,766 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-06-05 21:55:37,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 21:55:37,769 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:37,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:55:37,782 INFO L518 ElimStorePlain]: Eliminatee v_prenex_329 vanished before elimination [2021-06-05 21:55:37,782 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:55:37,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:55:37,783 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 21:55:37,810 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:37,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198437036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:37,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:37,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:37,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284971973] [2021-06-05 21:55:37,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:37,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:37,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:37,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:37,810 INFO L87 Difference]: Start difference. First operand 158 states and 346 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:38,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:38,142 INFO L93 Difference]: Finished difference Result 180 states and 390 transitions. [2021-06-05 21:55:38,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:55:38,142 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:38,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:38,143 INFO L225 Difference]: With dead ends: 180 [2021-06-05 21:55:38,143 INFO L226 Difference]: Without dead ends: 180 [2021-06-05 21:55:38,143 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 342.9ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:55:38,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-06-05 21:55:38,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 156. [2021-06-05 21:55:38,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.206451612903226) internal successors, (342), 155 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:38,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 342 transitions. [2021-06-05 21:55:38,144 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 342 transitions. Word has length 19 [2021-06-05 21:55:38,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:38,144 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 342 transitions. [2021-06-05 21:55:38,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:38,144 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 342 transitions. [2021-06-05 21:55:38,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:38,145 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:38,145 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:38,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1894,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:38,345 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:38,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:38,345 INFO L82 PathProgramCache]: Analyzing trace with hash -397477482, now seen corresponding path program 362 times [2021-06-05 21:55:38,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:38,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055161365] [2021-06-05 21:55:38,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:38,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:38,423 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:38,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:38,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055161365] [2021-06-05 21:55:38,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055161365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:38,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754026530] [2021-06-05 21:55:38,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:38,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:55:38,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:38,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:55:38,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:38,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:38,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:38,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:55:38,559 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:38,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:38,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:38,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:38,562 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:38,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:38,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:38,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:55:38,566 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:38,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:38,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:38,569 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:38,610 INFO L628 ElimStorePlain]: treesize reduction 69, result has 38.9 percent of original size [2021-06-05 21:55:38,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:38,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 21:55:38,614 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:55:38,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:55:38,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:55:38,631 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:141, output treesize:22 [2021-06-05 21:55:38,664 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:38,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754026530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:38,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:38,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:38,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832641511] [2021-06-05 21:55:38,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:38,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:38,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:38,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:38,665 INFO L87 Difference]: Start difference. First operand 156 states and 342 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:38,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:38,974 INFO L93 Difference]: Finished difference Result 210 states and 438 transitions. [2021-06-05 21:55:38,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:55:38,974 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:38,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:38,975 INFO L225 Difference]: With dead ends: 210 [2021-06-05 21:55:38,975 INFO L226 Difference]: Without dead ends: 207 [2021-06-05 21:55:38,975 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 278.0ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:55:38,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-06-05 21:55:38,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 161. [2021-06-05 21:55:38,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.20625) internal successors, (353), 160 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:38,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 353 transitions. [2021-06-05 21:55:38,976 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 353 transitions. Word has length 19 [2021-06-05 21:55:38,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:38,976 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 353 transitions. [2021-06-05 21:55:38,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:38,977 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 353 transitions. [2021-06-05 21:55:38,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:38,977 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:38,977 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:39,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1901,363 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:39,177 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:39,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:39,177 INFO L82 PathProgramCache]: Analyzing trace with hash -621408950, now seen corresponding path program 363 times [2021-06-05 21:55:39,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:39,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004838735] [2021-06-05 21:55:39,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:39,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:39,277 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:39,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:39,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004838735] [2021-06-05 21:55:39,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004838735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:39,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986113416] [2021-06-05 21:55:39,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:39,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:55:39,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:39,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:55:39,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:39,469 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:39,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986113416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:39,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:39,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:55:39,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173027088] [2021-06-05 21:55:39,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:55:39,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:39,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:55:39,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:55:39,470 INFO L87 Difference]: Start difference. First operand 161 states and 353 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:39,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:39,767 INFO L93 Difference]: Finished difference Result 197 states and 416 transitions. [2021-06-05 21:55:39,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:55:39,768 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:39,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:39,768 INFO L225 Difference]: With dead ends: 197 [2021-06-05 21:55:39,768 INFO L226 Difference]: Without dead ends: 197 [2021-06-05 21:55:39,768 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 341.0ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:55:39,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-06-05 21:55:39,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 161. [2021-06-05 21:55:39,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.20625) internal successors, (353), 160 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:39,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 353 transitions. [2021-06-05 21:55:39,770 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 353 transitions. Word has length 19 [2021-06-05 21:55:39,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:39,770 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 353 transitions. [2021-06-05 21:55:39,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:39,770 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 353 transitions. [2021-06-05 21:55:39,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:39,770 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:39,770 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:39,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1905 [2021-06-05 21:55:39,971 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:39,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:39,971 INFO L82 PathProgramCache]: Analyzing trace with hash 738707790, now seen corresponding path program 364 times [2021-06-05 21:55:39,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:39,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615706901] [2021-06-05 21:55:39,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:39,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:40,075 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:40,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:40,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615706901] [2021-06-05 21:55:40,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615706901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:40,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52261875] [2021-06-05 21:55:40,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:40,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:55:40,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:40,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:55:40,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:40,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:40,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:40,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:55:40,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:40,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:40,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:40,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:40,239 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:40,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:40,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:40,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:55:40,242 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:40,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:40,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:55:40,245 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:40,283 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 21:55:40,284 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:55:40,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:55:40,285 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 21:55:40,309 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:40,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52261875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:40,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:40,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:40,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074698832] [2021-06-05 21:55:40,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:40,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:40,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:40,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:40,310 INFO L87 Difference]: Start difference. First operand 161 states and 353 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:40,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:40,566 INFO L93 Difference]: Finished difference Result 216 states and 452 transitions. [2021-06-05 21:55:40,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:55:40,566 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:40,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:40,567 INFO L225 Difference]: With dead ends: 216 [2021-06-05 21:55:40,567 INFO L226 Difference]: Without dead ends: 216 [2021-06-05 21:55:40,567 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 276.9ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:55:40,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-06-05 21:55:40,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 160. [2021-06-05 21:55:40,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.207547169811321) internal successors, (351), 159 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:40,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 351 transitions. [2021-06-05 21:55:40,568 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 351 transitions. Word has length 19 [2021-06-05 21:55:40,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:40,568 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 351 transitions. [2021-06-05 21:55:40,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:40,568 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 351 transitions. [2021-06-05 21:55:40,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:40,569 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:40,569 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:40,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1917,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:40,769 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:40,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:40,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1494344204, now seen corresponding path program 365 times [2021-06-05 21:55:40,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:40,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444185828] [2021-06-05 21:55:40,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:40,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:40,873 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:40,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:40,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444185828] [2021-06-05 21:55:40,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444185828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:40,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341637594] [2021-06-05 21:55:40,873 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:40,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:55:40,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:40,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:55:40,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:41,043 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:41,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341637594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:41,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:41,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:41,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048675411] [2021-06-05 21:55:41,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:41,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:41,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:41,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:41,043 INFO L87 Difference]: Start difference. First operand 160 states and 351 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:41,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:41,324 INFO L93 Difference]: Finished difference Result 170 states and 367 transitions. [2021-06-05 21:55:41,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:55:41,324 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:41,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:41,325 INFO L225 Difference]: With dead ends: 170 [2021-06-05 21:55:41,325 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 21:55:41,325 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 315.4ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:55:41,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 21:55:41,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 160. [2021-06-05 21:55:41,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.20125786163522) internal successors, (350), 159 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:41,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 350 transitions. [2021-06-05 21:55:41,326 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 350 transitions. Word has length 19 [2021-06-05 21:55:41,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:41,326 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 350 transitions. [2021-06-05 21:55:41,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:41,326 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 350 transitions. [2021-06-05 21:55:41,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:41,327 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:41,327 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:41,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1927,366 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:41,527 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:41,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:41,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1407462970, now seen corresponding path program 366 times [2021-06-05 21:55:41,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:41,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540879044] [2021-06-05 21:55:41,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:41,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:41,604 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:41,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:41,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540879044] [2021-06-05 21:55:41,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540879044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:41,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769958098] [2021-06-05 21:55:41,604 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:41,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:55:41,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:41,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:55:41,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:41,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:41,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:41,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:41,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:41,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:41,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:41,761 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:41,779 INFO L628 ElimStorePlain]: treesize reduction 30, result has 43.4 percent of original size [2021-06-05 21:55:41,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:41,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 21:55:41,782 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:55:41,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:55:41,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:55:41,788 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-06-05 21:55:41,805 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:41,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769958098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:41,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:41,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:55:41,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008091832] [2021-06-05 21:55:41,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:55:41,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:41,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:55:41,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:55:41,806 INFO L87 Difference]: Start difference. First operand 160 states and 350 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:41,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:41,985 INFO L93 Difference]: Finished difference Result 187 states and 402 transitions. [2021-06-05 21:55:41,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:55:41,986 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:41,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:41,986 INFO L225 Difference]: With dead ends: 187 [2021-06-05 21:55:41,986 INFO L226 Difference]: Without dead ends: 187 [2021-06-05 21:55:41,986 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 200.3ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:55:41,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-06-05 21:55:41,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 151. [2021-06-05 21:55:41,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.2) internal successors, (330), 150 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:41,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 330 transitions. [2021-06-05 21:55:41,988 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 330 transitions. Word has length 19 [2021-06-05 21:55:41,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:41,988 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 330 transitions. [2021-06-05 21:55:41,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:41,988 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 330 transitions. [2021-06-05 21:55:41,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:41,988 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:41,988 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:42,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1931,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:42,188 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:42,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:42,189 INFO L82 PathProgramCache]: Analyzing trace with hash -43204718, now seen corresponding path program 367 times [2021-06-05 21:55:42,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:42,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674386834] [2021-06-05 21:55:42,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:42,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:42,270 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:42,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:42,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674386834] [2021-06-05 21:55:42,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674386834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:42,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996749214] [2021-06-05 21:55:42,271 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:42,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:42,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:55:42,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:42,443 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:42,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996749214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:42,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:42,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:55:42,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216189455] [2021-06-05 21:55:42,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:55:42,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:42,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:55:42,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:55:42,444 INFO L87 Difference]: Start difference. First operand 151 states and 330 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:42,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:42,582 INFO L93 Difference]: Finished difference Result 189 states and 406 transitions. [2021-06-05 21:55:42,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:55:42,582 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:42,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:42,582 INFO L225 Difference]: With dead ends: 189 [2021-06-05 21:55:42,582 INFO L226 Difference]: Without dead ends: 189 [2021-06-05 21:55:42,582 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 177.0ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:55:42,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-06-05 21:55:42,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 153. [2021-06-05 21:55:42,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.1973684210526314) internal successors, (334), 152 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:42,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 334 transitions. [2021-06-05 21:55:42,584 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 334 transitions. Word has length 19 [2021-06-05 21:55:42,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:42,584 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 334 transitions. [2021-06-05 21:55:42,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:42,584 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 334 transitions. [2021-06-05 21:55:42,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:42,584 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:42,584 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:42,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1932 [2021-06-05 21:55:42,785 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:42,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:42,785 INFO L82 PathProgramCache]: Analyzing trace with hash -403121236, now seen corresponding path program 368 times [2021-06-05 21:55:42,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:42,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735636309] [2021-06-05 21:55:42,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:42,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:42,902 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:42,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:42,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735636309] [2021-06-05 21:55:42,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735636309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:42,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77060697] [2021-06-05 21:55:42,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:42,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:55:42,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:42,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:55:42,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:43,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:43,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:43,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:43,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:43,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:43,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:43,065 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:43,110 INFO L628 ElimStorePlain]: treesize reduction 78, result has 35.5 percent of original size [2021-06-05 21:55:43,111 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:55:43,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 21:55:43,117 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:43,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:55:43,133 INFO L518 ElimStorePlain]: Eliminatee v_prenex_332 vanished before elimination [2021-06-05 21:55:43,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:55:43,135 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-06-05 21:55:43,175 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:43,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77060697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:43,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:43,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:55:43,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82022525] [2021-06-05 21:55:43,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:55:43,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:43,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:55:43,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:55:43,176 INFO L87 Difference]: Start difference. First operand 153 states and 334 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:43,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:43,301 INFO L93 Difference]: Finished difference Result 215 states and 458 transitions. [2021-06-05 21:55:43,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:55:43,301 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:43,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:43,301 INFO L225 Difference]: With dead ends: 215 [2021-06-05 21:55:43,301 INFO L226 Difference]: Without dead ends: 215 [2021-06-05 21:55:43,301 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 206.3ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:55:43,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-06-05 21:55:43,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 154. [2021-06-05 21:55:43,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.196078431372549) internal successors, (336), 153 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:43,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 336 transitions. [2021-06-05 21:55:43,303 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 336 transitions. Word has length 19 [2021-06-05 21:55:43,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:43,303 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 336 transitions. [2021-06-05 21:55:43,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:43,303 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 336 transitions. [2021-06-05 21:55:43,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:43,303 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:43,303 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:43,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1936,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:43,504 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:43,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:43,504 INFO L82 PathProgramCache]: Analyzing trace with hash 306926534, now seen corresponding path program 369 times [2021-06-05 21:55:43,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:43,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14417594] [2021-06-05 21:55:43,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:43,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:43,600 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:43,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:43,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14417594] [2021-06-05 21:55:43,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14417594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:43,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750743904] [2021-06-05 21:55:43,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:43,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:55:43,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:43,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:55:43,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:43,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:43,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:43,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:55:43,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:43,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:43,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:43,765 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:43,801 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-06-05 21:55:43,801 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:55:43,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 21:55:43,805 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:43,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:55:43,817 INFO L518 ElimStorePlain]: Eliminatee v_prenex_335 vanished before elimination [2021-06-05 21:55:43,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:55:43,818 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 21:55:43,843 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:43,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750743904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:43,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:43,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:43,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551123192] [2021-06-05 21:55:43,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:43,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:43,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:43,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:43,844 INFO L87 Difference]: Start difference. First operand 154 states and 336 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:44,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:44,076 INFO L93 Difference]: Finished difference Result 174 states and 376 transitions. [2021-06-05 21:55:44,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:55:44,076 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:44,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:44,077 INFO L225 Difference]: With dead ends: 174 [2021-06-05 21:55:44,077 INFO L226 Difference]: Without dead ends: 174 [2021-06-05 21:55:44,077 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 257.7ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:55:44,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-06-05 21:55:44,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 152. [2021-06-05 21:55:44,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.198675496688742) internal successors, (332), 151 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:44,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 332 transitions. [2021-06-05 21:55:44,078 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 332 transitions. Word has length 19 [2021-06-05 21:55:44,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:44,078 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 332 transitions. [2021-06-05 21:55:44,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:44,078 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 332 transitions. [2021-06-05 21:55:44,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:44,079 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:44,079 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:44,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 370 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1940 [2021-06-05 21:55:44,294 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:44,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:44,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1134992970, now seen corresponding path program 370 times [2021-06-05 21:55:44,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:44,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87128990] [2021-06-05 21:55:44,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:44,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:44,391 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:44,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:44,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87128990] [2021-06-05 21:55:44,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87128990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:44,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434636294] [2021-06-05 21:55:44,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:44,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:55:44,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:44,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:55:44,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:44,583 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:44,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434636294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:44,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:44,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:55:44,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995347797] [2021-06-05 21:55:44,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:55:44,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:44,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:55:44,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:55:44,584 INFO L87 Difference]: Start difference. First operand 152 states and 332 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:44,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:44,882 INFO L93 Difference]: Finished difference Result 190 states and 400 transitions. [2021-06-05 21:55:44,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:55:44,883 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:44,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:44,883 INFO L225 Difference]: With dead ends: 190 [2021-06-05 21:55:44,883 INFO L226 Difference]: Without dead ends: 190 [2021-06-05 21:55:44,883 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 332.4ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:55:44,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-06-05 21:55:44,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 154. [2021-06-05 21:55:44,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.2026143790849675) internal successors, (337), 153 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:44,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 337 transitions. [2021-06-05 21:55:44,885 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 337 transitions. Word has length 19 [2021-06-05 21:55:44,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:44,885 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 337 transitions. [2021-06-05 21:55:44,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:44,885 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 337 transitions. [2021-06-05 21:55:44,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:44,885 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:44,885 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:45,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1947 [2021-06-05 21:55:45,085 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:45,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:45,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1149788616, now seen corresponding path program 371 times [2021-06-05 21:55:45,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:45,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384545621] [2021-06-05 21:55:45,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:45,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:45,166 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:45,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:45,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384545621] [2021-06-05 21:55:45,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384545621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:45,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9411837] [2021-06-05 21:55:45,166 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:45,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:55:45,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:45,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:55:45,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:45,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:45,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:45,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:45,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:45,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:45,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:45,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:55:45,323 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:45,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:45,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:45,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:55:45,326 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:45,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:45,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:55:45,329 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:45,363 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 21:55:45,363 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:55:45,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:55:45,364 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 21:55:45,391 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:45,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9411837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:45,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:45,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:45,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029516719] [2021-06-05 21:55:45,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:45,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:45,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:45,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:45,392 INFO L87 Difference]: Start difference. First operand 154 states and 337 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:45,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:45,627 INFO L93 Difference]: Finished difference Result 221 states and 460 transitions. [2021-06-05 21:55:45,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:55:45,627 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:45,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:45,628 INFO L225 Difference]: With dead ends: 221 [2021-06-05 21:55:45,628 INFO L226 Difference]: Without dead ends: 221 [2021-06-05 21:55:45,628 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 291.2ms TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:55:45,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-06-05 21:55:45,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 155. [2021-06-05 21:55:45,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.220779220779221) internal successors, (342), 154 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:45,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 342 transitions. [2021-06-05 21:55:45,629 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 342 transitions. Word has length 19 [2021-06-05 21:55:45,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:45,630 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 342 transitions. [2021-06-05 21:55:45,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:45,630 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 342 transitions. [2021-06-05 21:55:45,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:45,630 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:45,630 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:45,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1957,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:45,830 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:45,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:45,830 INFO L82 PathProgramCache]: Analyzing trace with hash 262057716, now seen corresponding path program 372 times [2021-06-05 21:55:45,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:45,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237709192] [2021-06-05 21:55:45,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:45,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:45,923 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:45,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:45,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237709192] [2021-06-05 21:55:45,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237709192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:45,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30643176] [2021-06-05 21:55:45,924 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:45,951 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:55:45,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:45,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:55:45,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:46,069 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:46,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30643176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:46,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:46,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:46,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833739420] [2021-06-05 21:55:46,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:46,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:46,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:46,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:46,070 INFO L87 Difference]: Start difference. First operand 155 states and 342 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:46,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:46,294 INFO L93 Difference]: Finished difference Result 164 states and 356 transitions. [2021-06-05 21:55:46,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:55:46,295 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:46,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:46,295 INFO L225 Difference]: With dead ends: 164 [2021-06-05 21:55:46,295 INFO L226 Difference]: Without dead ends: 160 [2021-06-05 21:55:46,295 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 281.0ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:55:46,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-06-05 21:55:46,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 155. [2021-06-05 21:55:46,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.2142857142857144) internal successors, (341), 154 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:46,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 341 transitions. [2021-06-05 21:55:46,297 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 341 transitions. Word has length 19 [2021-06-05 21:55:46,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:46,297 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 341 transitions. [2021-06-05 21:55:46,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:46,297 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 341 transitions. [2021-06-05 21:55:46,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:46,297 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:46,297 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:46,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1967 [2021-06-05 21:55:46,498 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:46,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:46,498 INFO L82 PathProgramCache]: Analyzing trace with hash 348938950, now seen corresponding path program 373 times [2021-06-05 21:55:46,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:46,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437458566] [2021-06-05 21:55:46,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:46,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:46,596 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:46,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:46,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437458566] [2021-06-05 21:55:46,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437458566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:46,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938452244] [2021-06-05 21:55:46,597 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:46,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:46,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:55:46,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:46,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:46,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:46,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:46,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:46,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:46,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:46,736 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:46,754 INFO L628 ElimStorePlain]: treesize reduction 30, result has 43.4 percent of original size [2021-06-05 21:55:46,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:46,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 21:55:46,757 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:55:46,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:55:46,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:55:46,763 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-06-05 21:55:46,781 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:46,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938452244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:46,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:46,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:55:46,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487815426] [2021-06-05 21:55:46,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:55:46,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:46,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:55:46,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:55:46,782 INFO L87 Difference]: Start difference. First operand 155 states and 341 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:46,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:46,989 INFO L93 Difference]: Finished difference Result 184 states and 396 transitions. [2021-06-05 21:55:46,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:55:46,990 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:46,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:46,990 INFO L225 Difference]: With dead ends: 184 [2021-06-05 21:55:46,990 INFO L226 Difference]: Without dead ends: 184 [2021-06-05 21:55:46,990 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 247.6ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:55:46,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-06-05 21:55:46,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 151. [2021-06-05 21:55:46,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.2) internal successors, (330), 150 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:46,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 330 transitions. [2021-06-05 21:55:46,992 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 330 transitions. Word has length 19 [2021-06-05 21:55:46,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:46,992 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 330 transitions. [2021-06-05 21:55:46,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:46,992 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 330 transitions. [2021-06-05 21:55:46,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:46,992 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:46,992 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:47,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1971 [2021-06-05 21:55:47,192 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:47,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:47,193 INFO L82 PathProgramCache]: Analyzing trace with hash 473126158, now seen corresponding path program 374 times [2021-06-05 21:55:47,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:47,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928031403] [2021-06-05 21:55:47,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:47,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:47,286 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:47,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:47,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928031403] [2021-06-05 21:55:47,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928031403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:47,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241052896] [2021-06-05 21:55:47,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:47,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:55:47,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:47,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:55:47,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:47,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:47,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:47,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:55:47,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:47,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:47,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:47,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:55:47,426 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:47,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:47,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:47,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:47,430 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:47,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:47,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:47,433 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:47,473 INFO L628 ElimStorePlain]: treesize reduction 69, result has 38.9 percent of original size [2021-06-05 21:55:47,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:47,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 21:55:47,477 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:55:47,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:55:47,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:55:47,574 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:141, output treesize:22 [2021-06-05 21:55:47,605 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:47,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241052896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:47,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:47,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:47,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830576714] [2021-06-05 21:55:47,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:47,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:47,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:47,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:47,606 INFO L87 Difference]: Start difference. First operand 151 states and 330 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:48,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:48,047 INFO L93 Difference]: Finished difference Result 213 states and 445 transitions. [2021-06-05 21:55:48,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:55:48,047 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:48,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:48,047 INFO L225 Difference]: With dead ends: 213 [2021-06-05 21:55:48,048 INFO L226 Difference]: Without dead ends: 210 [2021-06-05 21:55:48,048 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 466.2ms TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:55:48,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-06-05 21:55:48,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 160. [2021-06-05 21:55:48,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.2264150943396226) internal successors, (354), 159 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:48,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 354 transitions. [2021-06-05 21:55:48,058 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 354 transitions. Word has length 19 [2021-06-05 21:55:48,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:48,058 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 354 transitions. [2021-06-05 21:55:48,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:48,058 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 354 transitions. [2021-06-05 21:55:48,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:48,058 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:48,058 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:48,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1972,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:48,273 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:48,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:48,273 INFO L82 PathProgramCache]: Analyzing trace with hash 249194690, now seen corresponding path program 375 times [2021-06-05 21:55:48,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:48,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135548712] [2021-06-05 21:55:48,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:48,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:48,364 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:48,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:48,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135548712] [2021-06-05 21:55:48,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135548712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:48,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53013583] [2021-06-05 21:55:48,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:48,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:55:48,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:48,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:55:48,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:48,579 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:48,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53013583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:48,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:48,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:55:48,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333705099] [2021-06-05 21:55:48,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:55:48,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:48,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:55:48,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:55:48,579 INFO L87 Difference]: Start difference. First operand 160 states and 354 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:48,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:48,963 INFO L93 Difference]: Finished difference Result 197 states and 418 transitions. [2021-06-05 21:55:48,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:55:48,963 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:48,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:48,964 INFO L225 Difference]: With dead ends: 197 [2021-06-05 21:55:48,964 INFO L226 Difference]: Without dead ends: 197 [2021-06-05 21:55:48,964 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 408.7ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:55:48,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-06-05 21:55:48,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 160. [2021-06-05 21:55:48,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.2264150943396226) internal successors, (354), 159 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:48,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 354 transitions. [2021-06-05 21:55:48,966 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 354 transitions. Word has length 19 [2021-06-05 21:55:48,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:48,966 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 354 transitions. [2021-06-05 21:55:48,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:48,966 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 354 transitions. [2021-06-05 21:55:48,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:48,966 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:48,966 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:49,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1976 [2021-06-05 21:55:49,167 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:49,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:49,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1161596142, now seen corresponding path program 376 times [2021-06-05 21:55:49,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:49,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569321343] [2021-06-05 21:55:49,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:49,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:49,261 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:49,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:49,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569321343] [2021-06-05 21:55:49,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569321343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:49,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91180873] [2021-06-05 21:55:49,262 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:49,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:55:49,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:49,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:55:49,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:49,440 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:49,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91180873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:49,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:49,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:49,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790151692] [2021-06-05 21:55:49,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:49,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:49,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:49,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:49,441 INFO L87 Difference]: Start difference. First operand 160 states and 354 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:49,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:49,905 INFO L93 Difference]: Finished difference Result 199 states and 419 transitions. [2021-06-05 21:55:49,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:55:49,905 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:49,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:49,905 INFO L225 Difference]: With dead ends: 199 [2021-06-05 21:55:49,905 INFO L226 Difference]: Without dead ends: 197 [2021-06-05 21:55:49,906 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 464.6ms TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:55:49,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-06-05 21:55:49,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 160. [2021-06-05 21:55:49,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.220125786163522) internal successors, (353), 159 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:49,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 353 transitions. [2021-06-05 21:55:49,907 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 353 transitions. Word has length 19 [2021-06-05 21:55:49,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:49,907 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 353 transitions. [2021-06-05 21:55:49,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:49,907 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 353 transitions. [2021-06-05 21:55:49,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:49,907 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:49,907 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:50,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1986,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:50,108 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:50,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:50,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1609311430, now seen corresponding path program 377 times [2021-06-05 21:55:50,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:50,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954138706] [2021-06-05 21:55:50,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:50,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:50,186 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:50,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:50,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954138706] [2021-06-05 21:55:50,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954138706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:50,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394993205] [2021-06-05 21:55:50,187 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:50,212 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:55:50,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:50,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:55:50,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:50,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:50,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:50,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:55:50,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:50,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:50,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:50,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:55:50,348 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:50,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:50,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:50,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:55:50,351 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:50,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:50,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:50,354 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:50,388 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 21:55:50,388 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:55:50,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:55:50,389 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 21:55:50,414 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:50,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394993205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:50,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:50,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:50,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165374312] [2021-06-05 21:55:50,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:50,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:50,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:50,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:50,415 INFO L87 Difference]: Start difference. First operand 160 states and 353 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:50,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:50,822 INFO L93 Difference]: Finished difference Result 224 states and 468 transitions. [2021-06-05 21:55:50,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:55:50,823 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:50,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:50,823 INFO L225 Difference]: With dead ends: 224 [2021-06-05 21:55:50,823 INFO L226 Difference]: Without dead ends: 224 [2021-06-05 21:55:50,823 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 434.4ms TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:55:50,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-06-05 21:55:50,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 159. [2021-06-05 21:55:50,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.221518987341772) internal successors, (351), 158 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:50,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 351 transitions. [2021-06-05 21:55:50,825 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 351 transitions. Word has length 19 [2021-06-05 21:55:50,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:50,825 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 351 transitions. [2021-06-05 21:55:50,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:50,826 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 351 transitions. [2021-06-05 21:55:50,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:50,827 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:50,827 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:51,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1996 [2021-06-05 21:55:51,031 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:51,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:51,031 INFO L82 PathProgramCache]: Analyzing trace with hash -623740564, now seen corresponding path program 378 times [2021-06-05 21:55:51,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:51,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427077223] [2021-06-05 21:55:51,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:51,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:51,129 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:51,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:51,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427077223] [2021-06-05 21:55:51,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427077223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:51,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651578750] [2021-06-05 21:55:51,129 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:51,156 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:55:51,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:51,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:55:51,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:51,307 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:51,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651578750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:51,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:51,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:51,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506294370] [2021-06-05 21:55:51,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:51,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:51,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:51,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:51,308 INFO L87 Difference]: Start difference. First operand 159 states and 351 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:51,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:51,547 INFO L93 Difference]: Finished difference Result 170 states and 367 transitions. [2021-06-05 21:55:51,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:55:51,548 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:51,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:51,548 INFO L225 Difference]: With dead ends: 170 [2021-06-05 21:55:51,548 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 21:55:51,549 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 338.8ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:55:51,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 21:55:51,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 159. [2021-06-05 21:55:51,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.2151898734177213) internal successors, (350), 158 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:51,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 350 transitions. [2021-06-05 21:55:51,551 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 350 transitions. Word has length 19 [2021-06-05 21:55:51,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:51,552 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 350 transitions. [2021-06-05 21:55:51,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:51,552 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 350 transitions. [2021-06-05 21:55:51,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:51,552 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:51,552 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:51,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2008,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:51,757 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:51,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:51,757 INFO L82 PathProgramCache]: Analyzing trace with hash -536859330, now seen corresponding path program 379 times [2021-06-05 21:55:51,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:51,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832655225] [2021-06-05 21:55:51,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:51,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:51,887 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:51,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:51,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832655225] [2021-06-05 21:55:51,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832655225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:51,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723899703] [2021-06-05 21:55:51,887 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:51,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:51,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:55:51,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:52,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:52,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:52,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:52,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:52,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:52,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:52,038 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:52,056 INFO L628 ElimStorePlain]: treesize reduction 36, result has 32.1 percent of original size [2021-06-05 21:55:52,056 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:55:52,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:55:52,057 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-06-05 21:55:52,075 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:52,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723899703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:52,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:52,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:55:52,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290594991] [2021-06-05 21:55:52,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:55:52,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:52,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:55:52,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:55:52,076 INFO L87 Difference]: Start difference. First operand 159 states and 350 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:52,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:52,420 INFO L93 Difference]: Finished difference Result 196 states and 419 transitions. [2021-06-05 21:55:52,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:55:52,420 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:52,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:52,421 INFO L225 Difference]: With dead ends: 196 [2021-06-05 21:55:52,421 INFO L226 Difference]: Without dead ends: 196 [2021-06-05 21:55:52,421 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 418.0ms TimeCoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:55:52,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-06-05 21:55:52,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 158. [2021-06-05 21:55:52,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.21656050955414) internal successors, (348), 157 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:52,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 348 transitions. [2021-06-05 21:55:52,422 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 348 transitions. Word has length 19 [2021-06-05 21:55:52,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:52,423 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 348 transitions. [2021-06-05 21:55:52,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:52,423 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 348 transitions. [2021-06-05 21:55:52,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:52,423 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:52,423 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:52,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 380 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2012 [2021-06-05 21:55:52,623 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:52,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:52,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1130086830, now seen corresponding path program 380 times [2021-06-05 21:55:52,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:52,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001262962] [2021-06-05 21:55:52,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:52,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:52,699 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:52,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:52,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001262962] [2021-06-05 21:55:52,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001262962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:52,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103441674] [2021-06-05 21:55:52,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:52,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:55:52,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:52,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:55:52,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:52,853 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:52,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103441674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:52,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:52,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:52,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778369758] [2021-06-05 21:55:52,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:52,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:52,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:52,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:52,854 INFO L87 Difference]: Start difference. First operand 158 states and 348 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:53,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:53,016 INFO L93 Difference]: Finished difference Result 167 states and 361 transitions. [2021-06-05 21:55:53,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:55:53,016 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:53,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:53,016 INFO L225 Difference]: With dead ends: 167 [2021-06-05 21:55:53,016 INFO L226 Difference]: Without dead ends: 161 [2021-06-05 21:55:53,016 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 221.1ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:55:53,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-06-05 21:55:53,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 158. [2021-06-05 21:55:53,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.210191082802548) internal successors, (347), 157 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:53,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 347 transitions. [2021-06-05 21:55:53,018 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 347 transitions. Word has length 19 [2021-06-05 21:55:53,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:53,018 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 347 transitions. [2021-06-05 21:55:53,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:53,018 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 347 transitions. [2021-06-05 21:55:53,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:53,018 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:53,018 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:53,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2013 [2021-06-05 21:55:53,218 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:53,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:53,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1651323846, now seen corresponding path program 381 times [2021-06-05 21:55:53,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:53,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659883528] [2021-06-05 21:55:53,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:53,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:53,293 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:53,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:53,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659883528] [2021-06-05 21:55:53,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659883528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:53,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033654709] [2021-06-05 21:55:53,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:53,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:55:53,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:53,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:55:53,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:53,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:53,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:53,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:53,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:53,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:53,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:53,431 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:53,450 INFO L628 ElimStorePlain]: treesize reduction 30, result has 43.4 percent of original size [2021-06-05 21:55:53,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:53,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 21:55:53,453 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:55:53,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:55:53,459 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:55:53,459 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-06-05 21:55:53,477 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:53,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033654709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:53,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:53,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:55:53,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819929888] [2021-06-05 21:55:53,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:55:53,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:53,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:55:53,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:55:53,478 INFO L87 Difference]: Start difference. First operand 158 states and 347 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:53,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:53,631 INFO L93 Difference]: Finished difference Result 184 states and 395 transitions. [2021-06-05 21:55:53,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:55:53,632 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:53,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:53,632 INFO L225 Difference]: With dead ends: 184 [2021-06-05 21:55:53,632 INFO L226 Difference]: Without dead ends: 184 [2021-06-05 21:55:53,632 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 200.5ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:55:53,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-06-05 21:55:53,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 150. [2021-06-05 21:55:53,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.2013422818791946) internal successors, (328), 149 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:53,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 328 transitions. [2021-06-05 21:55:53,633 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 328 transitions. Word has length 19 [2021-06-05 21:55:53,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:53,634 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 328 transitions. [2021-06-05 21:55:53,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:53,634 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 328 transitions. [2021-06-05 21:55:53,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:53,634 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:53,634 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:53,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2017,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:53,834 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:53,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:53,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1440748214, now seen corresponding path program 382 times [2021-06-05 21:55:53,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:53,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42823713] [2021-06-05 21:55:53,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:53,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:53,940 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:53,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:53,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42823713] [2021-06-05 21:55:53,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42823713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:53,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412195388] [2021-06-05 21:55:53,941 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:53,973 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:55:53,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:53,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:55:53,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:54,149 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:54,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412195388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:54,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:54,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:55:54,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225987222] [2021-06-05 21:55:54,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:55:54,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:54,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:55:54,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:55:54,150 INFO L87 Difference]: Start difference. First operand 150 states and 328 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:54,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:54,554 INFO L93 Difference]: Finished difference Result 193 states and 405 transitions. [2021-06-05 21:55:54,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:55:54,554 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:54,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:54,554 INFO L225 Difference]: With dead ends: 193 [2021-06-05 21:55:54,554 INFO L226 Difference]: Without dead ends: 193 [2021-06-05 21:55:54,554 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 444.7ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:55:54,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-06-05 21:55:54,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 153. [2021-06-05 21:55:54,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.210526315789474) internal successors, (336), 152 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:54,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 336 transitions. [2021-06-05 21:55:54,556 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 336 transitions. Word has length 19 [2021-06-05 21:55:54,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:54,556 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 336 transitions. [2021-06-05 21:55:54,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:54,556 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 336 transitions. [2021-06-05 21:55:54,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:54,556 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:54,556 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:54,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2018 [2021-06-05 21:55:54,757 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:54,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:54,757 INFO L82 PathProgramCache]: Analyzing trace with hash -80631474, now seen corresponding path program 383 times [2021-06-05 21:55:54,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:54,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646659436] [2021-06-05 21:55:54,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:54,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:54,840 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:54,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:54,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646659436] [2021-06-05 21:55:54,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646659436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:54,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557029686] [2021-06-05 21:55:54,840 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:54,870 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:55:54,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:54,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:55:54,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:55,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:55,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:55,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:55:55,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:55,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:55,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:55,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:55:55,016 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:55,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:55,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:55,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:55,023 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:55,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:55,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:55:55,026 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:55,057 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 21:55:55,057 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:55:55,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:55:55,058 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 21:55:55,083 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:55,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557029686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:55,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:55,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:55,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229328979] [2021-06-05 21:55:55,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:55,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:55,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:55,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:55,084 INFO L87 Difference]: Start difference. First operand 153 states and 336 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:55,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:55,675 INFO L93 Difference]: Finished difference Result 229 states and 475 transitions. [2021-06-05 21:55:55,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:55:55,675 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:55,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:55,676 INFO L225 Difference]: With dead ends: 229 [2021-06-05 21:55:55,676 INFO L226 Difference]: Without dead ends: 229 [2021-06-05 21:55:55,676 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 588.4ms TimeCoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:55:55,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-06-05 21:55:55,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 156. [2021-06-05 21:55:55,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.238709677419355) internal successors, (347), 155 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:55,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 347 transitions. [2021-06-05 21:55:55,677 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 347 transitions. Word has length 19 [2021-06-05 21:55:55,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:55,677 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 347 transitions. [2021-06-05 21:55:55,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:55,677 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 347 transitions. [2021-06-05 21:55:55,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:55,678 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:55,678 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:55,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2028 [2021-06-05 21:55:55,878 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:55,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:55,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1981283828, now seen corresponding path program 384 times [2021-06-05 21:55:55,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:55,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875428098] [2021-06-05 21:55:55,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:55,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:55,987 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:55,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:55,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875428098] [2021-06-05 21:55:55,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875428098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:55,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148695497] [2021-06-05 21:55:55,988 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:56,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:55:56,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:56,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:55:56,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:56,174 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:56,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148695497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:56,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:56,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:56,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650698385] [2021-06-05 21:55:56,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:56,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:56,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:56,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:56,175 INFO L87 Difference]: Start difference. First operand 156 states and 347 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:56,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:56,403 INFO L93 Difference]: Finished difference Result 170 states and 368 transitions. [2021-06-05 21:55:56,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:55:56,403 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:56,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:56,404 INFO L225 Difference]: With dead ends: 170 [2021-06-05 21:55:56,404 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 21:55:56,404 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 328.1ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:55:56,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 21:55:56,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 156. [2021-06-05 21:55:56,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.232258064516129) internal successors, (346), 155 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:56,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 346 transitions. [2021-06-05 21:55:56,405 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 346 transitions. Word has length 19 [2021-06-05 21:55:56,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:56,405 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 346 transitions. [2021-06-05 21:55:56,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:56,405 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 346 transitions. [2021-06-05 21:55:56,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:56,406 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:56,406 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:56,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2040,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:56,613 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:56,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:56,613 INFO L82 PathProgramCache]: Analyzing trace with hash 2068165062, now seen corresponding path program 385 times [2021-06-05 21:55:56,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:56,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804550125] [2021-06-05 21:55:56,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:56,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:56,697 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:56,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:56,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804550125] [2021-06-05 21:55:56,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804550125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:56,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464853577] [2021-06-05 21:55:56,698 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:56,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:56,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:55:56,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:56,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:56,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:56,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:56,855 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:56,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:56,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:56,858 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:56,875 INFO L628 ElimStorePlain]: treesize reduction 36, result has 32.1 percent of original size [2021-06-05 21:55:56,875 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:55:56,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:55:56,876 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-06-05 21:55:56,895 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:56,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464853577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:56,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:56,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:55:56,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039672846] [2021-06-05 21:55:56,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:55:56,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:56,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:55:56,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:55:56,896 INFO L87 Difference]: Start difference. First operand 156 states and 346 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:57,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:57,350 INFO L93 Difference]: Finished difference Result 201 states and 430 transitions. [2021-06-05 21:55:57,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:55:57,350 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:57,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:57,350 INFO L225 Difference]: With dead ends: 201 [2021-06-05 21:55:57,350 INFO L226 Difference]: Without dead ends: 201 [2021-06-05 21:55:57,351 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 461.0ms TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:55:57,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-06-05 21:55:57,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 155. [2021-06-05 21:55:57,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.2337662337662336) internal successors, (344), 154 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:57,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 344 transitions. [2021-06-05 21:55:57,352 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 344 transitions. Word has length 19 [2021-06-05 21:55:57,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:57,352 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 344 transitions. [2021-06-05 21:55:57,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:57,352 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 344 transitions. [2021-06-05 21:55:57,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:57,352 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:57,352 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:57,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2044,386 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:57,559 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:57,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:57,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1474937562, now seen corresponding path program 386 times [2021-06-05 21:55:57,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:57,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4445603] [2021-06-05 21:55:57,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:57,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:57,666 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:57,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:57,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4445603] [2021-06-05 21:55:57,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4445603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:57,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066923599] [2021-06-05 21:55:57,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:57,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:55:57,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:57,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:55:57,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:57,837 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:57,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066923599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:57,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:57,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:57,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873887986] [2021-06-05 21:55:57,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:57,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:57,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:57,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:57,838 INFO L87 Difference]: Start difference. First operand 155 states and 344 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:58,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:58,038 INFO L93 Difference]: Finished difference Result 168 states and 363 transitions. [2021-06-05 21:55:58,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:55:58,038 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:58,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:58,039 INFO L225 Difference]: With dead ends: 168 [2021-06-05 21:55:58,039 INFO L226 Difference]: Without dead ends: 162 [2021-06-05 21:55:58,039 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 290.2ms TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:55:58,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-06-05 21:55:58,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 155. [2021-06-05 21:55:58,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.227272727272727) internal successors, (343), 154 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:58,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 343 transitions. [2021-06-05 21:55:58,040 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 343 transitions. Word has length 19 [2021-06-05 21:55:58,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:58,040 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 343 transitions. [2021-06-05 21:55:58,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:58,040 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 343 transitions. [2021-06-05 21:55:58,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:58,040 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:58,041 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:58,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 387 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2045 [2021-06-05 21:55:58,241 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:58,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:58,241 INFO L82 PathProgramCache]: Analyzing trace with hash -38619058, now seen corresponding path program 387 times [2021-06-05 21:55:58,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:58,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880338586] [2021-06-05 21:55:58,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:58,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:58,321 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:58,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:58,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880338586] [2021-06-05 21:55:58,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880338586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:58,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370030452] [2021-06-05 21:55:58,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:58,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:55:58,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:58,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:55:58,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:58,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:58,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:58,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:58,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:58,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:58,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:55:58,481 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:58,499 INFO L628 ElimStorePlain]: treesize reduction 30, result has 43.4 percent of original size [2021-06-05 21:55:58,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:58,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 21:55:58,503 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:55:58,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:55:58,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:55:58,508 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-06-05 21:55:58,528 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:58,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370030452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:58,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:58,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:55:58,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789797923] [2021-06-05 21:55:58,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:55:58,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:58,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:55:58,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:55:58,528 INFO L87 Difference]: Start difference. First operand 155 states and 343 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:58,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:58,864 INFO L93 Difference]: Finished difference Result 194 states and 417 transitions. [2021-06-05 21:55:58,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:55:58,864 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:58,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:58,864 INFO L225 Difference]: With dead ends: 194 [2021-06-05 21:55:58,864 INFO L226 Difference]: Without dead ends: 194 [2021-06-05 21:55:58,864 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 381.4ms TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:55:58,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-06-05 21:55:58,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 154. [2021-06-05 21:55:58,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.2287581699346406) internal successors, (341), 153 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:58,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 341 transitions. [2021-06-05 21:55:58,866 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 341 transitions. Word has length 19 [2021-06-05 21:55:58,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:58,866 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 341 transitions. [2021-06-05 21:55:58,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:58,866 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 341 transitions. [2021-06-05 21:55:58,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:58,866 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:58,866 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:59,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2049 [2021-06-05 21:55:59,067 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:59,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:59,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1336894796, now seen corresponding path program 388 times [2021-06-05 21:55:59,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:59,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026207549] [2021-06-05 21:55:59,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:59,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:59,150 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:59,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:59,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026207549] [2021-06-05 21:55:59,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026207549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:59,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276124939] [2021-06-05 21:55:59,150 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:59,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:55:59,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:59,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:55:59,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:59,304 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:59,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276124939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:59,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:59,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:59,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105641181] [2021-06-05 21:55:59,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:59,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:59,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:59,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:59,305 INFO L87 Difference]: Start difference. First operand 154 states and 341 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:59,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:55:59,470 INFO L93 Difference]: Finished difference Result 165 states and 357 transitions. [2021-06-05 21:55:59,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:55:59,470 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:55:59,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:55:59,471 INFO L225 Difference]: With dead ends: 165 [2021-06-05 21:55:59,471 INFO L226 Difference]: Without dead ends: 157 [2021-06-05 21:55:59,471 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 245.1ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:55:59,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-06-05 21:55:59,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 154. [2021-06-05 21:55:59,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.2222222222222223) internal successors, (340), 153 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:59,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 340 transitions. [2021-06-05 21:55:59,472 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 340 transitions. Word has length 19 [2021-06-05 21:55:59,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:55:59,472 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 340 transitions. [2021-06-05 21:55:59,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:55:59,472 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 340 transitions. [2021-06-05 21:55:59,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:55:59,472 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:55:59,472 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:55:59,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2050,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:59,673 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:55:59,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:55:59,673 INFO L82 PathProgramCache]: Analyzing trace with hash -924417338, now seen corresponding path program 389 times [2021-06-05 21:55:59,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:55:59,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81325584] [2021-06-05 21:55:59,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:55:59,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:55:59,750 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:59,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:55:59,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81325584] [2021-06-05 21:55:59,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81325584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:59,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733008162] [2021-06-05 21:55:59,750 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:55:59,775 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:55:59,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:55:59,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:55:59,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:55:59,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:59,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:59,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:55:59,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:59,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:55:59,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:55:59,900 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:55:59,914 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-06-05 21:55:59,914 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:55:59,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:55:59,915 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-06-05 21:55:59,920 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:55:59,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733008162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:55:59,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:55:59,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:55:59,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37038998] [2021-06-05 21:55:59,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:55:59,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:55:59,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:55:59,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:55:59,921 INFO L87 Difference]: Start difference. First operand 154 states and 340 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:00,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:00,049 INFO L93 Difference]: Finished difference Result 174 states and 375 transitions. [2021-06-05 21:56:00,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:56:00,049 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:00,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:00,049 INFO L225 Difference]: With dead ends: 174 [2021-06-05 21:56:00,049 INFO L226 Difference]: Without dead ends: 174 [2021-06-05 21:56:00,049 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 158.2ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:56:00,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-06-05 21:56:00,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 151. [2021-06-05 21:56:00,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.2) internal successors, (330), 150 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:00,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 330 transitions. [2021-06-05 21:56:00,051 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 330 transitions. Word has length 19 [2021-06-05 21:56:00,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:00,051 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 330 transitions. [2021-06-05 21:56:00,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:00,051 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 330 transitions. [2021-06-05 21:56:00,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:00,051 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:00,051 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:00,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2054 [2021-06-05 21:56:00,251 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:00,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:00,252 INFO L82 PathProgramCache]: Analyzing trace with hash -2089052390, now seen corresponding path program 390 times [2021-06-05 21:56:00,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:00,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819049491] [2021-06-05 21:56:00,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:00,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:00,336 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:00,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:00,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819049491] [2021-06-05 21:56:00,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819049491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:00,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391929634] [2021-06-05 21:56:00,337 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:00,401 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:56:00,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:00,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:56:00,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:00,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:00,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:00,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:00,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:00,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:00,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:00,538 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:00,554 INFO L628 ElimStorePlain]: treesize reduction 38, result has 30.9 percent of original size [2021-06-05 21:56:00,555 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:56:00,555 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:56:00,555 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-06-05 21:56:00,572 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:00,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391929634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:00,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:00,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:56:00,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522391398] [2021-06-05 21:56:00,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:56:00,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:00,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:56:00,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:56:00,573 INFO L87 Difference]: Start difference. First operand 151 states and 330 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:00,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:00,725 INFO L93 Difference]: Finished difference Result 167 states and 362 transitions. [2021-06-05 21:56:00,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:56:00,725 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:00,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:00,726 INFO L225 Difference]: With dead ends: 167 [2021-06-05 21:56:00,726 INFO L226 Difference]: Without dead ends: 167 [2021-06-05 21:56:00,726 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 175.2ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:56:00,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-05 21:56:00,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 151. [2021-06-05 21:56:00,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.2) internal successors, (330), 150 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:00,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 330 transitions. [2021-06-05 21:56:00,727 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 330 transitions. Word has length 19 [2021-06-05 21:56:00,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:00,727 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 330 transitions. [2021-06-05 21:56:00,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:00,727 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 330 transitions. [2021-06-05 21:56:00,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:00,727 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:00,727 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:00,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 391 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2058 [2021-06-05 21:56:00,928 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:00,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:00,928 INFO L82 PathProgramCache]: Analyzing trace with hash -2022497462, now seen corresponding path program 391 times [2021-06-05 21:56:00,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:00,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381063077] [2021-06-05 21:56:00,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:00,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:01,010 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:01,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:01,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381063077] [2021-06-05 21:56:01,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381063077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:01,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433942434] [2021-06-05 21:56:01,010 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:01,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:01,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:56:01,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:01,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:01,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:01,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:01,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:01,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:01,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:01,162 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:01,178 INFO L628 ElimStorePlain]: treesize reduction 38, result has 30.9 percent of original size [2021-06-05 21:56:01,178 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:56:01,178 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:56:01,179 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-06-05 21:56:01,195 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:01,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433942434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:01,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:01,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:56:01,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776282153] [2021-06-05 21:56:01,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:56:01,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:01,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:56:01,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:56:01,196 INFO L87 Difference]: Start difference. First operand 151 states and 330 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:01,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:01,519 INFO L93 Difference]: Finished difference Result 189 states and 406 transitions. [2021-06-05 21:56:01,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:56:01,519 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:01,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:01,519 INFO L225 Difference]: With dead ends: 189 [2021-06-05 21:56:01,519 INFO L226 Difference]: Without dead ends: 189 [2021-06-05 21:56:01,519 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 363.2ms TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:56:01,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-06-05 21:56:01,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 152. [2021-06-05 21:56:01,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.198675496688742) internal successors, (332), 151 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:01,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 332 transitions. [2021-06-05 21:56:01,521 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 332 transitions. Word has length 19 [2021-06-05 21:56:01,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:01,521 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 332 transitions. [2021-06-05 21:56:01,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:01,521 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 332 transitions. [2021-06-05 21:56:01,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:01,521 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:01,521 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:01,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2059 [2021-06-05 21:56:01,721 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:01,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:01,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1027690778, now seen corresponding path program 392 times [2021-06-05 21:56:01,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:01,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192348150] [2021-06-05 21:56:01,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:01,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:01,809 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:01,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:01,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192348150] [2021-06-05 21:56:01,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192348150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:01,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523210958] [2021-06-05 21:56:01,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:01,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:56:01,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:01,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:56:01,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:01,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:01,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:01,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:01,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:01,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:01,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:01,968 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:01,985 INFO L628 ElimStorePlain]: treesize reduction 38, result has 30.9 percent of original size [2021-06-05 21:56:01,985 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:56:01,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:56:01,985 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-06-05 21:56:02,002 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:02,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523210958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:02,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:02,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:56:02,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441049312] [2021-06-05 21:56:02,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:56:02,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:02,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:56:02,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:56:02,003 INFO L87 Difference]: Start difference. First operand 152 states and 332 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:02,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:02,461 INFO L93 Difference]: Finished difference Result 200 states and 426 transitions. [2021-06-05 21:56:02,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:56:02,461 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:02,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:02,461 INFO L225 Difference]: With dead ends: 200 [2021-06-05 21:56:02,461 INFO L226 Difference]: Without dead ends: 200 [2021-06-05 21:56:02,461 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 458.8ms TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:56:02,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-06-05 21:56:02,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 153. [2021-06-05 21:56:02,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.1973684210526314) internal successors, (334), 152 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:02,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 334 transitions. [2021-06-05 21:56:02,463 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 334 transitions. Word has length 19 [2021-06-05 21:56:02,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:02,463 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 334 transitions. [2021-06-05 21:56:02,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:02,463 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 334 transitions. [2021-06-05 21:56:02,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:02,463 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:02,463 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:02,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2060,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:02,663 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:02,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:02,664 INFO L82 PathProgramCache]: Analyzing trace with hash 667774260, now seen corresponding path program 393 times [2021-06-05 21:56:02,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:02,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742010830] [2021-06-05 21:56:02,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:02,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:02,745 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:02,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:02,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742010830] [2021-06-05 21:56:02,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742010830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:02,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604745787] [2021-06-05 21:56:02,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:02,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:56:02,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:02,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:56:02,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:02,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:02,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:02,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:56:02,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:02,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:02,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:02,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:56:02,911 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:02,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:02,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:02,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:02,918 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:02,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:02,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:56:02,921 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:02,952 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 21:56:02,952 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:56:02,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:56:02,953 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 21:56:02,990 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:02,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604745787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:02,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:02,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:56:02,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052236485] [2021-06-05 21:56:02,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:56:02,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:02,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:56:02,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:56:02,991 INFO L87 Difference]: Start difference. First operand 153 states and 334 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:03,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:03,560 INFO L93 Difference]: Finished difference Result 199 states and 425 transitions. [2021-06-05 21:56:03,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:56:03,561 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:03,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:03,561 INFO L225 Difference]: With dead ends: 199 [2021-06-05 21:56:03,561 INFO L226 Difference]: Without dead ends: 199 [2021-06-05 21:56:03,561 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 561.9ms TimeCoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:56:03,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-05 21:56:03,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 154. [2021-06-05 21:56:03,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.196078431372549) internal successors, (336), 153 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:03,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 336 transitions. [2021-06-05 21:56:03,562 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 336 transitions. Word has length 19 [2021-06-05 21:56:03,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:03,562 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 336 transitions. [2021-06-05 21:56:03,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:03,562 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 336 transitions. [2021-06-05 21:56:03,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:03,563 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:03,563 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:03,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2061,394 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:03,763 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:03,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:03,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1377822030, now seen corresponding path program 394 times [2021-06-05 21:56:03,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:03,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405046566] [2021-06-05 21:56:03,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:03,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:03,864 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:03,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:03,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405046566] [2021-06-05 21:56:03,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405046566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:03,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827480473] [2021-06-05 21:56:03,865 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:03,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:56:03,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:03,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:56:03,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:04,044 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:04,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827480473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:04,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:04,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:56:04,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339614518] [2021-06-05 21:56:04,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:56:04,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:04,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:56:04,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:56:04,044 INFO L87 Difference]: Start difference. First operand 154 states and 336 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:04,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:04,383 INFO L93 Difference]: Finished difference Result 167 states and 363 transitions. [2021-06-05 21:56:04,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:56:04,384 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:04,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:04,384 INFO L225 Difference]: With dead ends: 167 [2021-06-05 21:56:04,384 INFO L226 Difference]: Without dead ends: 167 [2021-06-05 21:56:04,384 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 408.6ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:56:04,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-05 21:56:04,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 150. [2021-06-05 21:56:04,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.2013422818791946) internal successors, (328), 149 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:04,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 328 transitions. [2021-06-05 21:56:04,385 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 328 transitions. Word has length 19 [2021-06-05 21:56:04,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:04,385 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 328 transitions. [2021-06-05 21:56:04,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:04,386 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 328 transitions. [2021-06-05 21:56:04,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:04,386 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:04,386 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:04,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2071,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:04,586 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:04,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:04,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1032302878, now seen corresponding path program 395 times [2021-06-05 21:56:04,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:04,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75309209] [2021-06-05 21:56:04,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:04,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:04,664 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:04,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:04,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75309209] [2021-06-05 21:56:04,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75309209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:04,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307719040] [2021-06-05 21:56:04,665 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:04,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:56:04,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:04,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:56:04,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:04,813 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:04,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307719040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:04,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:04,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:56:04,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494291441] [2021-06-05 21:56:04,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:56:04,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:04,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:56:04,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:56:04,814 INFO L87 Difference]: Start difference. First operand 150 states and 328 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:05,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:05,026 INFO L93 Difference]: Finished difference Result 159 states and 340 transitions. [2021-06-05 21:56:05,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:56:05,026 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:05,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:05,027 INFO L225 Difference]: With dead ends: 159 [2021-06-05 21:56:05,027 INFO L226 Difference]: Without dead ends: 150 [2021-06-05 21:56:05,027 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 278.2ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:56:05,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-06-05 21:56:05,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2021-06-05 21:56:05,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.195945945945946) internal successors, (325), 148 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:05,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 325 transitions. [2021-06-05 21:56:05,028 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 325 transitions. Word has length 19 [2021-06-05 21:56:05,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:05,028 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 325 transitions. [2021-06-05 21:56:05,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:05,028 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 325 transitions. [2021-06-05 21:56:05,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:05,028 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:05,028 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:05,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2081,396 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:05,229 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:05,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:05,229 INFO L82 PathProgramCache]: Analyzing trace with hash 582526930, now seen corresponding path program 396 times [2021-06-05 21:56:05,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:05,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185771911] [2021-06-05 21:56:05,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:05,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:05,307 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:05,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:05,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185771911] [2021-06-05 21:56:05,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185771911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:05,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935979717] [2021-06-05 21:56:05,308 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:05,332 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:56:05,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:05,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:56:05,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:05,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:05,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:05,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:05,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:05,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:05,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:05,459 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:05,476 INFO L628 ElimStorePlain]: treesize reduction 40, result has 29.8 percent of original size [2021-06-05 21:56:05,476 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:56:05,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:56:05,477 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-06-05 21:56:05,496 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:05,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935979717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:05,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:05,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:56:05,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667840953] [2021-06-05 21:56:05,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:56:05,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:05,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:56:05,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:56:05,497 INFO L87 Difference]: Start difference. First operand 149 states and 325 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:05,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:05,645 INFO L93 Difference]: Finished difference Result 177 states and 381 transitions. [2021-06-05 21:56:05,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:56:05,645 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:05,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:05,645 INFO L225 Difference]: With dead ends: 177 [2021-06-05 21:56:05,645 INFO L226 Difference]: Without dead ends: 177 [2021-06-05 21:56:05,645 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 208.9ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:56:05,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-06-05 21:56:05,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 150. [2021-06-05 21:56:05,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.1946308724832213) internal successors, (327), 149 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:05,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 327 transitions. [2021-06-05 21:56:05,647 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 327 transitions. Word has length 19 [2021-06-05 21:56:05,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:05,647 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 327 transitions. [2021-06-05 21:56:05,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:05,647 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 327 transitions. [2021-06-05 21:56:05,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:05,647 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:05,647 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:05,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2085 [2021-06-05 21:56:05,847 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:05,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:05,848 INFO L82 PathProgramCache]: Analyzing trace with hash -662252126, now seen corresponding path program 397 times [2021-06-05 21:56:05,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:05,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334276608] [2021-06-05 21:56:05,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:05,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:05,926 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:05,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:05,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334276608] [2021-06-05 21:56:05,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334276608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:05,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730365288] [2021-06-05 21:56:05,926 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:05,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:05,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:56:05,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:06,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:06,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:06,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:06,071 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:06,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:06,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:06,073 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:06,093 INFO L628 ElimStorePlain]: treesize reduction 36, result has 32.1 percent of original size [2021-06-05 21:56:06,093 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:56:06,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:56:06,094 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-06-05 21:56:06,111 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:06,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730365288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:06,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:06,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:56:06,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624286531] [2021-06-05 21:56:06,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:56:06,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:06,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:56:06,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:56:06,112 INFO L87 Difference]: Start difference. First operand 150 states and 327 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:06,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:06,505 INFO L93 Difference]: Finished difference Result 193 states and 413 transitions. [2021-06-05 21:56:06,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:56:06,505 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:06,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:06,505 INFO L225 Difference]: With dead ends: 193 [2021-06-05 21:56:06,506 INFO L226 Difference]: Without dead ends: 193 [2021-06-05 21:56:06,506 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 416.0ms TimeCoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:56:06,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-06-05 21:56:06,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 151. [2021-06-05 21:56:06,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.1933333333333334) internal successors, (329), 150 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:06,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 329 transitions. [2021-06-05 21:56:06,507 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 329 transitions. Word has length 19 [2021-06-05 21:56:06,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:06,507 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 329 transitions. [2021-06-05 21:56:06,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:06,507 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 329 transitions. [2021-06-05 21:56:06,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:06,507 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:06,507 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:06,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2086,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:06,708 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:06,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:06,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1022168644, now seen corresponding path program 398 times [2021-06-05 21:56:06,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:06,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492238420] [2021-06-05 21:56:06,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:06,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:06,801 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:06,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:06,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492238420] [2021-06-05 21:56:06,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492238420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:06,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677896975] [2021-06-05 21:56:06,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:06,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:56:06,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:06,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:56:06,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:06,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:06,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:06,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:56:06,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:06,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:06,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:06,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:56:06,965 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:06,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:06,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:06,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:06,968 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:06,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:06,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:06,971 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:07,011 INFO L628 ElimStorePlain]: treesize reduction 83, result has 31.4 percent of original size [2021-06-05 21:56:07,011 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:56:07,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:56:07,012 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:141, output treesize:22 [2021-06-05 21:56:07,055 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:07,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677896975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:07,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:07,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:56:07,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143127401] [2021-06-05 21:56:07,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:56:07,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:07,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:56:07,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:56:07,055 INFO L87 Difference]: Start difference. First operand 151 states and 329 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:07,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:07,512 INFO L93 Difference]: Finished difference Result 204 states and 435 transitions. [2021-06-05 21:56:07,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:56:07,512 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:07,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:07,512 INFO L225 Difference]: With dead ends: 204 [2021-06-05 21:56:07,512 INFO L226 Difference]: Without dead ends: 204 [2021-06-05 21:56:07,512 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 476.5ms TimeCoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:56:07,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-06-05 21:56:07,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 152. [2021-06-05 21:56:07,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.19205298013245) internal successors, (331), 151 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:07,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 331 transitions. [2021-06-05 21:56:07,514 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 331 transitions. Word has length 19 [2021-06-05 21:56:07,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:07,514 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 331 transitions. [2021-06-05 21:56:07,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:07,514 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 331 transitions. [2021-06-05 21:56:07,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:07,514 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:07,514 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:07,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2087,399 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:07,715 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:07,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:07,715 INFO L82 PathProgramCache]: Analyzing trace with hash -312120874, now seen corresponding path program 399 times [2021-06-05 21:56:07,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:07,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522785035] [2021-06-05 21:56:07,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:07,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:07,807 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:07,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:07,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522785035] [2021-06-05 21:56:07,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522785035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:07,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588369538] [2021-06-05 21:56:07,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:07,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:56:07,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:07,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:56:07,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:07,981 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:07,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588369538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:07,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:07,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:56:07,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575282000] [2021-06-05 21:56:07,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:56:07,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:07,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:56:07,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:56:07,982 INFO L87 Difference]: Start difference. First operand 152 states and 331 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:08,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:08,336 INFO L93 Difference]: Finished difference Result 165 states and 358 transitions. [2021-06-05 21:56:08,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:56:08,336 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:08,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:08,337 INFO L225 Difference]: With dead ends: 165 [2021-06-05 21:56:08,337 INFO L226 Difference]: Without dead ends: 165 [2021-06-05 21:56:08,337 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 405.3ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:56:08,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-06-05 21:56:08,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 149. [2021-06-05 21:56:08,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.195945945945946) internal successors, (325), 148 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:08,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 325 transitions. [2021-06-05 21:56:08,338 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 325 transitions. Word has length 19 [2021-06-05 21:56:08,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:08,338 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 325 transitions. [2021-06-05 21:56:08,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:08,338 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 325 transitions. [2021-06-05 21:56:08,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:08,338 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:08,339 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:08,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2090 [2021-06-05 21:56:08,548 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:08,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:08,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1548050406, now seen corresponding path program 400 times [2021-06-05 21:56:08,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:08,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845215362] [2021-06-05 21:56:08,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:08,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:08,653 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:08,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:08,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845215362] [2021-06-05 21:56:08,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845215362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:08,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959988425] [2021-06-05 21:56:08,653 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:08,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:56:08,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:08,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:56:08,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:08,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:08,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:08,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:56:08,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:08,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:08,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:56:08,801 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:08,815 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-06-05 21:56:08,815 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:56:08,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:56:08,815 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-06-05 21:56:08,830 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:08,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959988425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:08,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:08,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:56:08,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118279052] [2021-06-05 21:56:08,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:56:08,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:08,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:56:08,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:56:08,831 INFO L87 Difference]: Start difference. First operand 149 states and 325 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:09,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:09,023 INFO L93 Difference]: Finished difference Result 177 states and 381 transitions. [2021-06-05 21:56:09,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:56:09,023 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:09,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:09,023 INFO L225 Difference]: With dead ends: 177 [2021-06-05 21:56:09,023 INFO L226 Difference]: Without dead ends: 177 [2021-06-05 21:56:09,023 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 229.3ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:56:09,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-06-05 21:56:09,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 150. [2021-06-05 21:56:09,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.1946308724832213) internal successors, (327), 149 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:09,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 327 transitions. [2021-06-05 21:56:09,025 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 327 transitions. Word has length 19 [2021-06-05 21:56:09,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:09,025 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 327 transitions. [2021-06-05 21:56:09,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:09,025 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 327 transitions. [2021-06-05 21:56:09,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:09,025 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:09,025 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:09,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 401 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2100 [2021-06-05 21:56:09,226 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:09,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:09,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1907966924, now seen corresponding path program 401 times [2021-06-05 21:56:09,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:09,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804810949] [2021-06-05 21:56:09,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:09,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:09,297 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:09,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:09,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804810949] [2021-06-05 21:56:09,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804810949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:09,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517241744] [2021-06-05 21:56:09,297 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:09,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:56:09,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:09,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:56:09,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:09,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:09,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:09,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:09,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:09,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:09,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:09,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:56:09,447 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:09,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:09,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:09,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:56:09,451 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:09,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:09,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:56:09,453 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:09,485 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 21:56:09,485 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:56:09,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:56:09,486 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 21:56:09,511 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:09,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517241744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:09,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:09,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:56:09,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738306440] [2021-06-05 21:56:09,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:56:09,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:09,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:56:09,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:56:09,511 INFO L87 Difference]: Start difference. First operand 150 states and 327 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:09,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:09,728 INFO L93 Difference]: Finished difference Result 190 states and 408 transitions. [2021-06-05 21:56:09,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:56:09,728 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:09,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:09,728 INFO L225 Difference]: With dead ends: 190 [2021-06-05 21:56:09,728 INFO L226 Difference]: Without dead ends: 190 [2021-06-05 21:56:09,728 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 253.1ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:56:09,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-06-05 21:56:09,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 151. [2021-06-05 21:56:09,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.1933333333333334) internal successors, (329), 150 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:09,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 329 transitions. [2021-06-05 21:56:09,730 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 329 transitions. Word has length 19 [2021-06-05 21:56:09,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:09,730 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 329 transitions. [2021-06-05 21:56:09,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:09,730 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 329 transitions. [2021-06-05 21:56:09,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:09,730 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:09,730 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:09,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 402 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2104 [2021-06-05 21:56:09,931 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:09,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:09,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1197919154, now seen corresponding path program 402 times [2021-06-05 21:56:09,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:09,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063100548] [2021-06-05 21:56:09,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:09,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:10,016 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:10,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:10,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063100548] [2021-06-05 21:56:10,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063100548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:10,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973733386] [2021-06-05 21:56:10,016 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:10,041 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:56:10,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:10,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:56:10,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:10,172 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:10,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973733386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:10,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:10,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:56:10,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164093263] [2021-06-05 21:56:10,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:56:10,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:10,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:56:10,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:56:10,173 INFO L87 Difference]: Start difference. First operand 151 states and 329 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:10,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:10,359 INFO L93 Difference]: Finished difference Result 165 states and 358 transitions. [2021-06-05 21:56:10,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:56:10,359 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:10,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:10,359 INFO L225 Difference]: With dead ends: 165 [2021-06-05 21:56:10,359 INFO L226 Difference]: Without dead ends: 165 [2021-06-05 21:56:10,359 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 251.4ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:56:10,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-06-05 21:56:10,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 149. [2021-06-05 21:56:10,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.195945945945946) internal successors, (325), 148 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:10,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 325 transitions. [2021-06-05 21:56:10,361 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 325 transitions. Word has length 19 [2021-06-05 21:56:10,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:10,361 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 325 transitions. [2021-06-05 21:56:10,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:10,361 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 325 transitions. [2021-06-05 21:56:10,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:10,361 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:10,361 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:10,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2114,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:10,561 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:10,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:10,562 INFO L82 PathProgramCache]: Analyzing trace with hash -369852718, now seen corresponding path program 403 times [2021-06-05 21:56:10,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:10,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138319957] [2021-06-05 21:56:10,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:10,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:10,647 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:10,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:10,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138319957] [2021-06-05 21:56:10,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138319957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:10,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283529196] [2021-06-05 21:56:10,648 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:10,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:10,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:56:10,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:10,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:10,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:10,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:56:10,800 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:10,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:10,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:10,803 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:10,840 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-06-05 21:56:10,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 21:56:10,842 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:10,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:56:10,855 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:56:10,855 INFO L518 ElimStorePlain]: Eliminatee v_prenex_337 vanished before elimination [2021-06-05 21:56:10,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:56:10,856 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 21:56:10,895 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:10,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283529196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:10,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:10,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:56:10,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068482052] [2021-06-05 21:56:10,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:56:10,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:10,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:56:10,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:56:10,896 INFO L87 Difference]: Start difference. First operand 149 states and 325 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:11,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:11,120 INFO L93 Difference]: Finished difference Result 178 states and 375 transitions. [2021-06-05 21:56:11,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:56:11,120 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:11,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:11,121 INFO L225 Difference]: With dead ends: 178 [2021-06-05 21:56:11,121 INFO L226 Difference]: Without dead ends: 178 [2021-06-05 21:56:11,121 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 271.9ms TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:56:11,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-06-05 21:56:11,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 151. [2021-06-05 21:56:11,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.2) internal successors, (330), 150 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:11,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 330 transitions. [2021-06-05 21:56:11,122 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 330 transitions. Word has length 19 [2021-06-05 21:56:11,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:11,122 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 330 transitions. [2021-06-05 21:56:11,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:11,122 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 330 transitions. [2021-06-05 21:56:11,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:11,122 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:11,122 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:11,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 404 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2124 [2021-06-05 21:56:11,323 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:11,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:11,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1242787972, now seen corresponding path program 404 times [2021-06-05 21:56:11,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:11,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675824107] [2021-06-05 21:56:11,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:11,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:11,413 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:11,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:11,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675824107] [2021-06-05 21:56:11,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675824107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:11,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246883914] [2021-06-05 21:56:11,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:11,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:56:11,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:11,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:56:11,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:11,577 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:11,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246883914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:11,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:11,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:56:11,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118402876] [2021-06-05 21:56:11,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:56:11,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:11,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:56:11,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:56:11,578 INFO L87 Difference]: Start difference. First operand 151 states and 330 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:11,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:11,747 INFO L93 Difference]: Finished difference Result 155 states and 334 transitions. [2021-06-05 21:56:11,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:56:11,748 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:11,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:11,748 INFO L225 Difference]: With dead ends: 155 [2021-06-05 21:56:11,748 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 21:56:11,748 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 210.8ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:56:11,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 21:56:11,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-06-05 21:56:11,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.1933333333333334) internal successors, (329), 150 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:11,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 329 transitions. [2021-06-05 21:56:11,749 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 329 transitions. Word has length 19 [2021-06-05 21:56:11,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:11,749 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 329 transitions. [2021-06-05 21:56:11,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:11,750 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 329 transitions. [2021-06-05 21:56:11,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:11,750 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:11,750 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:11,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2131,405 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:11,950 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:11,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:11,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1155906738, now seen corresponding path program 405 times [2021-06-05 21:56:11,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:11,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239329017] [2021-06-05 21:56:11,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:11,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:12,029 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:12,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:12,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239329017] [2021-06-05 21:56:12,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239329017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:12,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035936733] [2021-06-05 21:56:12,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:12,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:56:12,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:12,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:56:12,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:12,185 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:12,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035936733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:12,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:12,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:56:12,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842535597] [2021-06-05 21:56:12,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:56:12,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:12,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:56:12,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:56:12,186 INFO L87 Difference]: Start difference. First operand 151 states and 329 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:12,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:12,297 INFO L93 Difference]: Finished difference Result 175 states and 377 transitions. [2021-06-05 21:56:12,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:56:12,297 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:12,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:12,298 INFO L225 Difference]: With dead ends: 175 [2021-06-05 21:56:12,298 INFO L226 Difference]: Without dead ends: 175 [2021-06-05 21:56:12,298 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 160.5ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:56:12,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-06-05 21:56:12,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 151. [2021-06-05 21:56:12,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.1933333333333334) internal successors, (329), 150 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:12,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 329 transitions. [2021-06-05 21:56:12,299 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 329 transitions. Word has length 19 [2021-06-05 21:56:12,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:12,299 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 329 transitions. [2021-06-05 21:56:12,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:12,299 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 329 transitions. [2021-06-05 21:56:12,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:12,299 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:12,299 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:12,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2136 [2021-06-05 21:56:12,500 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:12,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:12,500 INFO L82 PathProgramCache]: Analyzing trace with hash -266095542, now seen corresponding path program 406 times [2021-06-05 21:56:12,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:12,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514562941] [2021-06-05 21:56:12,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:12,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:12,586 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:12,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:12,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514562941] [2021-06-05 21:56:12,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514562941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:12,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935169433] [2021-06-05 21:56:12,586 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:12,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:56:12,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:12,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:56:12,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:12,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:12,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:12,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:12,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:12,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:12,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:12,724 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:12,740 INFO L628 ElimStorePlain]: treesize reduction 38, result has 30.9 percent of original size [2021-06-05 21:56:12,740 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:56:12,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:56:12,741 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-06-05 21:56:12,757 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:12,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935169433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:12,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:12,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:56:12,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667945065] [2021-06-05 21:56:12,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:56:12,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:12,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:56:12,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:56:12,758 INFO L87 Difference]: Start difference. First operand 151 states and 329 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:12,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:12,924 INFO L93 Difference]: Finished difference Result 178 states and 383 transitions. [2021-06-05 21:56:12,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:56:12,924 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:12,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:12,924 INFO L225 Difference]: With dead ends: 178 [2021-06-05 21:56:12,924 INFO L226 Difference]: Without dead ends: 178 [2021-06-05 21:56:12,924 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 197.8ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:56:12,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-06-05 21:56:12,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 151. [2021-06-05 21:56:12,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.1933333333333334) internal successors, (329), 150 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:12,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 329 transitions. [2021-06-05 21:56:12,926 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 329 transitions. Word has length 19 [2021-06-05 21:56:12,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:12,926 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 329 transitions. [2021-06-05 21:56:12,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:12,926 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 329 transitions. [2021-06-05 21:56:12,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:12,926 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:12,926 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:13,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2140 [2021-06-05 21:56:13,141 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:13,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:13,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1510874598, now seen corresponding path program 407 times [2021-06-05 21:56:13,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:13,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942154673] [2021-06-05 21:56:13,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:13,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:13,214 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:13,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:13,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942154673] [2021-06-05 21:56:13,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942154673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:13,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705671015] [2021-06-05 21:56:13,214 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:13,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:56:13,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:13,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:56:13,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:13,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:13,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:13,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:56:13,363 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:13,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:13,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:56:13,365 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:13,379 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-06-05 21:56:13,379 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:56:13,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:56:13,380 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-06-05 21:56:13,397 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:13,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705671015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:13,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:13,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:56:13,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535966128] [2021-06-05 21:56:13,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:56:13,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:13,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:56:13,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:56:13,398 INFO L87 Difference]: Start difference. First operand 151 states and 329 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:13,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:13,753 INFO L93 Difference]: Finished difference Result 196 states and 419 transitions. [2021-06-05 21:56:13,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:56:13,754 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:13,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:13,754 INFO L225 Difference]: With dead ends: 196 [2021-06-05 21:56:13,754 INFO L226 Difference]: Without dead ends: 196 [2021-06-05 21:56:13,754 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 350.4ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:56:13,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-06-05 21:56:13,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 152. [2021-06-05 21:56:13,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.19205298013245) internal successors, (331), 151 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:13,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 331 transitions. [2021-06-05 21:56:13,755 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 331 transitions. Word has length 19 [2021-06-05 21:56:13,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:13,756 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 331 transitions. [2021-06-05 21:56:13,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:13,756 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 331 transitions. [2021-06-05 21:56:13,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:13,756 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:13,756 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:13,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2141,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:13,956 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:13,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:13,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1870791116, now seen corresponding path program 408 times [2021-06-05 21:56:13,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:13,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416574356] [2021-06-05 21:56:13,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:13,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:14,030 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:14,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:14,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416574356] [2021-06-05 21:56:14,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416574356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:14,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372153776] [2021-06-05 21:56:14,031 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:14,056 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:56:14,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:14,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:56:14,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:14,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:14,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:14,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:56:14,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:14,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:14,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:14,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:14,181 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:14,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:14,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:14,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:56:14,184 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:14,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:14,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:56:14,186 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:14,218 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 21:56:14,218 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:56:14,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:56:14,219 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 21:56:14,255 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:14,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372153776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:14,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:14,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:56:14,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333951708] [2021-06-05 21:56:14,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:56:14,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:14,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:56:14,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:56:14,256 INFO L87 Difference]: Start difference. First operand 152 states and 331 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:14,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:14,663 INFO L93 Difference]: Finished difference Result 205 states and 438 transitions. [2021-06-05 21:56:14,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:56:14,663 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:14,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:14,664 INFO L225 Difference]: With dead ends: 205 [2021-06-05 21:56:14,664 INFO L226 Difference]: Without dead ends: 205 [2021-06-05 21:56:14,664 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 442.4ms TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:56:14,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-05 21:56:14,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 153. [2021-06-05 21:56:14,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.1907894736842106) internal successors, (333), 152 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:14,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 333 transitions. [2021-06-05 21:56:14,665 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 333 transitions. Word has length 19 [2021-06-05 21:56:14,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:14,665 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 333 transitions. [2021-06-05 21:56:14,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:14,665 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 333 transitions. [2021-06-05 21:56:14,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:14,666 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:14,666 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:14,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2145 [2021-06-05 21:56:14,866 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:14,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:14,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1160743346, now seen corresponding path program 409 times [2021-06-05 21:56:14,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:14,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132556286] [2021-06-05 21:56:14,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:14,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:14,953 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:14,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:14,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132556286] [2021-06-05 21:56:14,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132556286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:14,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132151623] [2021-06-05 21:56:14,953 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:14,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:14,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:56:14,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:15,119 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:15,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132151623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:15,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:15,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:56:15,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807130288] [2021-06-05 21:56:15,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:56:15,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:15,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:56:15,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:56:15,120 INFO L87 Difference]: Start difference. First operand 153 states and 333 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:15,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:15,475 INFO L93 Difference]: Finished difference Result 167 states and 362 transitions. [2021-06-05 21:56:15,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:56:15,475 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:15,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:15,475 INFO L225 Difference]: With dead ends: 167 [2021-06-05 21:56:15,475 INFO L226 Difference]: Without dead ends: 167 [2021-06-05 21:56:15,476 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 367.5ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:56:15,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-05 21:56:15,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 150. [2021-06-05 21:56:15,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.1946308724832213) internal successors, (327), 149 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:15,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 327 transitions. [2021-06-05 21:56:15,477 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 327 transitions. Word has length 19 [2021-06-05 21:56:15,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:15,477 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 327 transitions. [2021-06-05 21:56:15,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:15,477 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 327 transitions. [2021-06-05 21:56:15,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:15,477 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:15,477 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:15,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2155 [2021-06-05 21:56:15,693 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:15,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:15,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1898294418, now seen corresponding path program 410 times [2021-06-05 21:56:15,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:15,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733153913] [2021-06-05 21:56:15,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:15,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:15,764 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:15,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:15,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733153913] [2021-06-05 21:56:15,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733153913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:15,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315613197] [2021-06-05 21:56:15,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:15,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:56:15,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:15,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:56:15,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:15,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:15,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:15,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:15,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:15,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:15,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:15,900 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:15,916 INFO L628 ElimStorePlain]: treesize reduction 38, result has 30.9 percent of original size [2021-06-05 21:56:15,916 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:56:15,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:56:15,917 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-06-05 21:56:15,932 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:15,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315613197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:15,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:15,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:56:15,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094042430] [2021-06-05 21:56:15,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:56:15,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:15,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:56:15,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:56:15,932 INFO L87 Difference]: Start difference. First operand 150 states and 327 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:16,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:16,074 INFO L93 Difference]: Finished difference Result 180 states and 387 transitions. [2021-06-05 21:56:16,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:56:16,074 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:16,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:16,074 INFO L225 Difference]: With dead ends: 180 [2021-06-05 21:56:16,074 INFO L226 Difference]: Without dead ends: 180 [2021-06-05 21:56:16,074 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 204.8ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:56:16,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-06-05 21:56:16,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 152. [2021-06-05 21:56:16,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.19205298013245) internal successors, (331), 151 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:16,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 331 transitions. [2021-06-05 21:56:16,076 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 331 transitions. Word has length 19 [2021-06-05 21:56:16,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:16,076 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 331 transitions. [2021-06-05 21:56:16,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:16,076 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 331 transitions. [2021-06-05 21:56:16,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:16,076 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:16,076 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:16,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2165,411 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:16,277 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:16,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:16,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1538377900, now seen corresponding path program 411 times [2021-06-05 21:56:16,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:16,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905216140] [2021-06-05 21:56:16,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:16,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:16,353 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:16,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:16,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905216140] [2021-06-05 21:56:16,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905216140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:16,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428559584] [2021-06-05 21:56:16,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:16,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:56:16,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:16,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:56:16,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:16,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:16,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:16,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:56:16,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:16,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:16,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:16,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:16,495 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:16,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:16,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:16,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:56:16,498 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:16,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:16,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:56:16,501 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:16,534 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 21:56:16,534 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:56:16,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:56:16,535 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 21:56:16,570 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:16,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428559584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:16,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:16,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:56:16,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982644467] [2021-06-05 21:56:16,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:56:16,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:16,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:56:16,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:56:16,571 INFO L87 Difference]: Start difference. First operand 152 states and 331 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:16,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:16,907 INFO L93 Difference]: Finished difference Result 199 states and 426 transitions. [2021-06-05 21:56:16,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:56:16,907 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:16,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:16,907 INFO L225 Difference]: With dead ends: 199 [2021-06-05 21:56:16,907 INFO L226 Difference]: Without dead ends: 199 [2021-06-05 21:56:16,907 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 354.7ms TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:56:16,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-05 21:56:16,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 153. [2021-06-05 21:56:16,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.1907894736842106) internal successors, (333), 152 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:16,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 333 transitions. [2021-06-05 21:56:16,909 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 333 transitions. Word has length 19 [2021-06-05 21:56:16,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:16,909 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 333 transitions. [2021-06-05 21:56:16,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:16,909 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 333 transitions. [2021-06-05 21:56:16,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:16,909 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:16,909 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:17,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2166 [2021-06-05 21:56:17,117 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:17,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:17,117 INFO L82 PathProgramCache]: Analyzing trace with hash -2046541626, now seen corresponding path program 412 times [2021-06-05 21:56:17,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:17,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925046725] [2021-06-05 21:56:17,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:17,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:17,220 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:17,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:17,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925046725] [2021-06-05 21:56:17,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925046725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:17,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111117261] [2021-06-05 21:56:17,220 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:17,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:56:17,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:17,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:56:17,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:17,375 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:17,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111117261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:17,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:17,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:56:17,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927149454] [2021-06-05 21:56:17,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:56:17,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:17,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:56:17,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:56:17,375 INFO L87 Difference]: Start difference. First operand 153 states and 333 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:17,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:17,612 INFO L93 Difference]: Finished difference Result 166 states and 360 transitions. [2021-06-05 21:56:17,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:56:17,612 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:17,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:17,612 INFO L225 Difference]: With dead ends: 166 [2021-06-05 21:56:17,612 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 21:56:17,612 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 306.3ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:56:17,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 21:56:17,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 151. [2021-06-05 21:56:17,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.1933333333333334) internal successors, (329), 150 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:17,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 329 transitions. [2021-06-05 21:56:17,614 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 329 transitions. Word has length 19 [2021-06-05 21:56:17,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:17,614 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 329 transitions. [2021-06-05 21:56:17,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:17,614 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 329 transitions. [2021-06-05 21:56:17,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:17,614 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:17,614 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:17,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2176,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:17,815 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:17,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:17,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1218475190, now seen corresponding path program 413 times [2021-06-05 21:56:17,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:17,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549167145] [2021-06-05 21:56:17,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:17,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:17,896 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:17,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:17,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549167145] [2021-06-05 21:56:17,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549167145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:17,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830642117] [2021-06-05 21:56:17,897 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:17,921 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:56:17,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:17,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:56:17,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:18,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:18,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:18,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:56:18,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:18,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:18,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:56:18,044 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:18,082 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-06-05 21:56:18,082 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:56:18,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 21:56:18,085 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:18,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:56:18,097 INFO L518 ElimStorePlain]: Eliminatee v_prenex_341 vanished before elimination [2021-06-05 21:56:18,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:56:18,098 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 21:56:18,135 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:18,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830642117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:18,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:18,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:56:18,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032566436] [2021-06-05 21:56:18,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:56:18,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:18,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:56:18,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:56:18,136 INFO L87 Difference]: Start difference. First operand 151 states and 329 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:18,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:18,386 INFO L93 Difference]: Finished difference Result 180 states and 379 transitions. [2021-06-05 21:56:18,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:56:18,386 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:18,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:18,386 INFO L225 Difference]: With dead ends: 180 [2021-06-05 21:56:18,386 INFO L226 Difference]: Without dead ends: 180 [2021-06-05 21:56:18,386 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 257.7ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:56:18,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-06-05 21:56:18,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 153. [2021-06-05 21:56:18,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.1973684210526314) internal successors, (334), 152 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:18,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 334 transitions. [2021-06-05 21:56:18,388 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 334 transitions. Word has length 19 [2021-06-05 21:56:18,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:18,388 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 334 transitions. [2021-06-05 21:56:18,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:18,388 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 334 transitions. [2021-06-05 21:56:18,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:18,388 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:18,388 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:18,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2186,414 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:18,589 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:18,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:18,589 INFO L82 PathProgramCache]: Analyzing trace with hash 791710520, now seen corresponding path program 414 times [2021-06-05 21:56:18,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:18,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306157550] [2021-06-05 21:56:18,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:18,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:18,665 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:18,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:18,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306157550] [2021-06-05 21:56:18,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306157550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:18,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681156787] [2021-06-05 21:56:18,665 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:18,691 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:56:18,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:18,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:56:18,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:18,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:18,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:18,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:56:18,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:18,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:18,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:56:18,818 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:18,865 INFO L628 ElimStorePlain]: treesize reduction 72, result has 39.5 percent of original size [2021-06-05 21:56:18,866 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:56:18,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:18,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:18,869 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:18,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:56:18,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:18,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 21:56:18,890 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:56:18,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:56:18,908 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:56:18,908 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-06-05 21:56:18,950 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:18,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681156787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:18,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:18,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:56:18,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634328440] [2021-06-05 21:56:18,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:56:18,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:18,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:56:18,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:56:18,951 INFO L87 Difference]: Start difference. First operand 153 states and 334 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:19,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:19,100 INFO L93 Difference]: Finished difference Result 223 states and 465 transitions. [2021-06-05 21:56:19,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:56:19,101 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:19,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:19,101 INFO L225 Difference]: With dead ends: 223 [2021-06-05 21:56:19,101 INFO L226 Difference]: Without dead ends: 223 [2021-06-05 21:56:19,101 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 221.4ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:56:19,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-06-05 21:56:19,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 154. [2021-06-05 21:56:19,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.215686274509804) internal successors, (339), 153 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:19,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 339 transitions. [2021-06-05 21:56:19,103 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 339 transitions. Word has length 19 [2021-06-05 21:56:19,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:19,103 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 339 transitions. [2021-06-05 21:56:19,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:19,103 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 339 transitions. [2021-06-05 21:56:19,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:19,103 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:19,103 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:19,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2193,415 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:19,303 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:19,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:19,304 INFO L82 PathProgramCache]: Analyzing trace with hash -2091410444, now seen corresponding path program 415 times [2021-06-05 21:56:19,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:19,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79141774] [2021-06-05 21:56:19,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:19,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:19,397 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:19,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:19,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79141774] [2021-06-05 21:56:19,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79141774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:19,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384148332] [2021-06-05 21:56:19,397 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:19,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:19,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:56:19,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:19,555 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:19,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384148332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:19,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:19,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:56:19,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851809600] [2021-06-05 21:56:19,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:56:19,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:19,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:56:19,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:56:19,556 INFO L87 Difference]: Start difference. First operand 154 states and 339 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:19,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:19,762 INFO L93 Difference]: Finished difference Result 158 states and 343 transitions. [2021-06-05 21:56:19,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:56:19,763 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:19,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:19,763 INFO L225 Difference]: With dead ends: 158 [2021-06-05 21:56:19,763 INFO L226 Difference]: Without dead ends: 154 [2021-06-05 21:56:19,763 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 281.2ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:56:19,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-05 21:56:19,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2021-06-05 21:56:19,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.2091503267973858) internal successors, (338), 153 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:19,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 338 transitions. [2021-06-05 21:56:19,764 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 338 transitions. Word has length 19 [2021-06-05 21:56:19,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:19,765 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 338 transitions. [2021-06-05 21:56:19,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:19,765 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 338 transitions. [2021-06-05 21:56:19,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:19,765 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:19,765 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:19,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2197,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:19,965 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:19,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:19,965 INFO L82 PathProgramCache]: Analyzing trace with hash -2004529210, now seen corresponding path program 416 times [2021-06-05 21:56:19,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:19,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628094204] [2021-06-05 21:56:19,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:19,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:20,042 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:20,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:20,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628094204] [2021-06-05 21:56:20,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628094204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:20,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035859922] [2021-06-05 21:56:20,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:20,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:56:20,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:20,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:56:20,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:20,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:20,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:20,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:20,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:20,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:20,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:20,199 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:20,219 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 21:56:20,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:20,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 21:56:20,222 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:56:20,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:56:20,228 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:56:20,228 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 21:56:20,246 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:20,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035859922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:20,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:20,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:56:20,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088028733] [2021-06-05 21:56:20,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:56:20,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:20,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:56:20,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:56:20,247 INFO L87 Difference]: Start difference. First operand 154 states and 338 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:20,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:20,356 INFO L93 Difference]: Finished difference Result 176 states and 379 transitions. [2021-06-05 21:56:20,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:56:20,357 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:20,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:20,357 INFO L225 Difference]: With dead ends: 176 [2021-06-05 21:56:20,357 INFO L226 Difference]: Without dead ends: 176 [2021-06-05 21:56:20,357 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 171.4ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:56:20,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-06-05 21:56:20,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 149. [2021-06-05 21:56:20,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.195945945945946) internal successors, (325), 148 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:20,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 325 transitions. [2021-06-05 21:56:20,359 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 325 transitions. Word has length 19 [2021-06-05 21:56:20,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:20,359 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 325 transitions. [2021-06-05 21:56:20,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:20,359 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 325 transitions. [2021-06-05 21:56:20,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:20,359 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:20,359 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:20,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2202 [2021-06-05 21:56:20,560 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:20,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:20,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1439707570, now seen corresponding path program 417 times [2021-06-05 21:56:20,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:20,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677223748] [2021-06-05 21:56:20,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:20,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:20,650 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:20,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:20,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677223748] [2021-06-05 21:56:20,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677223748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:20,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946731748] [2021-06-05 21:56:20,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:20,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:56:20,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:20,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:56:20,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:20,798 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:20,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946731748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:20,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:20,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:56:20,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444545819] [2021-06-05 21:56:20,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:56:20,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:20,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:56:20,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:56:20,798 INFO L87 Difference]: Start difference. First operand 149 states and 325 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:20,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:20,958 INFO L93 Difference]: Finished difference Result 156 states and 334 transitions. [2021-06-05 21:56:20,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:56:20,959 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:20,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:20,959 INFO L225 Difference]: With dead ends: 156 [2021-06-05 21:56:20,959 INFO L226 Difference]: Without dead ends: 150 [2021-06-05 21:56:20,959 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 230.8ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:56:20,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-06-05 21:56:20,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2021-06-05 21:56:20,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.189189189189189) internal successors, (324), 148 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:20,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 324 transitions. [2021-06-05 21:56:20,960 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 324 transitions. Word has length 19 [2021-06-05 21:56:20,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:20,960 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 324 transitions. [2021-06-05 21:56:20,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:20,960 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 324 transitions. [2021-06-05 21:56:20,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:20,961 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:20,961 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:21,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2204,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:21,161 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:21,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:21,161 INFO L82 PathProgramCache]: Analyzing trace with hash 208351514, now seen corresponding path program 418 times [2021-06-05 21:56:21,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:21,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785372383] [2021-06-05 21:56:21,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:21,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:21,241 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:21,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:21,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785372383] [2021-06-05 21:56:21,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785372383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:21,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954397186] [2021-06-05 21:56:21,241 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:21,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:56:21,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:21,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:56:21,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:21,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:21,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:21,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:56:21,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:21,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:21,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:56:21,392 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:21,406 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-06-05 21:56:21,407 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:56:21,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:56:21,407 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-06-05 21:56:21,411 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:21,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954397186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:21,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:21,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:56:21,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598938328] [2021-06-05 21:56:21,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:56:21,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:21,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:56:21,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:56:21,412 INFO L87 Difference]: Start difference. First operand 149 states and 324 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:21,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:21,587 INFO L93 Difference]: Finished difference Result 186 states and 398 transitions. [2021-06-05 21:56:21,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:56:21,588 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:21,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:21,588 INFO L225 Difference]: With dead ends: 186 [2021-06-05 21:56:21,588 INFO L226 Difference]: Without dead ends: 186 [2021-06-05 21:56:21,588 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 192.5ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:56:21,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-06-05 21:56:21,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 149. [2021-06-05 21:56:21,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.189189189189189) internal successors, (324), 148 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:21,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 324 transitions. [2021-06-05 21:56:21,589 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 324 transitions. Word has length 19 [2021-06-05 21:56:21,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:21,590 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 324 transitions. [2021-06-05 21:56:21,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:21,590 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 324 transitions. [2021-06-05 21:56:21,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:21,590 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:21,590 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:21,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2208 [2021-06-05 21:56:21,790 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:21,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:21,791 INFO L82 PathProgramCache]: Analyzing trace with hash -801633974, now seen corresponding path program 419 times [2021-06-05 21:56:21,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:21,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596013494] [2021-06-05 21:56:21,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:21,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:21,887 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:21,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:21,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596013494] [2021-06-05 21:56:21,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596013494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:21,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876565034] [2021-06-05 21:56:21,887 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:21,912 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:56:21,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:21,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:56:21,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:22,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:22,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:22,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:56:22,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:22,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:22,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:22,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:56:22,054 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:22,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:22,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:22,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:56:22,057 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:22,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:22,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:22,060 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:22,101 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 21:56:22,101 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:56:22,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:56:22,102 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 21:56:22,130 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:22,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876565034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:22,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:22,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:56:22,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427355050] [2021-06-05 21:56:22,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:56:22,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:22,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:56:22,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:56:22,131 INFO L87 Difference]: Start difference. First operand 149 states and 324 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:22,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:22,314 INFO L93 Difference]: Finished difference Result 200 states and 426 transitions. [2021-06-05 21:56:22,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:56:22,314 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:22,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:22,314 INFO L225 Difference]: With dead ends: 200 [2021-06-05 21:56:22,314 INFO L226 Difference]: Without dead ends: 200 [2021-06-05 21:56:22,315 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 220.9ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:56:22,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-06-05 21:56:22,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 150. [2021-06-05 21:56:22,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.1879194630872485) internal successors, (326), 149 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:22,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 326 transitions. [2021-06-05 21:56:22,316 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 326 transitions. Word has length 19 [2021-06-05 21:56:22,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:22,316 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 326 transitions. [2021-06-05 21:56:22,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:22,316 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 326 transitions. [2021-06-05 21:56:22,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:22,316 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:22,316 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:22,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 420 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2212 [2021-06-05 21:56:22,517 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:22,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:22,517 INFO L82 PathProgramCache]: Analyzing trace with hash 558482766, now seen corresponding path program 420 times [2021-06-05 21:56:22,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:22,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119173037] [2021-06-05 21:56:22,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:22,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:22,601 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:22,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:22,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119173037] [2021-06-05 21:56:22,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119173037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:22,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996658146] [2021-06-05 21:56:22,601 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:22,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:56:22,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:22,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:56:22,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:22,777 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:22,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996658146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:22,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:22,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:56:22,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359735570] [2021-06-05 21:56:22,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:56:22,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:22,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:56:22,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:56:22,778 INFO L87 Difference]: Start difference. First operand 150 states and 326 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:22,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:22,999 INFO L93 Difference]: Finished difference Result 167 states and 361 transitions. [2021-06-05 21:56:23,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:56:23,000 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:23,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:23,000 INFO L225 Difference]: With dead ends: 167 [2021-06-05 21:56:23,000 INFO L226 Difference]: Without dead ends: 167 [2021-06-05 21:56:23,000 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 268.3ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:56:23,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-05 21:56:23,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 148. [2021-06-05 21:56:23,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.1904761904761907) internal successors, (322), 147 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:23,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 322 transitions. [2021-06-05 21:56:23,001 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 322 transitions. Word has length 19 [2021-06-05 21:56:23,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:23,002 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 322 transitions. [2021-06-05 21:56:23,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:23,002 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 322 transitions. [2021-06-05 21:56:23,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:23,002 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:23,002 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:23,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2222 [2021-06-05 21:56:23,202 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:23,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:23,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1386549202, now seen corresponding path program 421 times [2021-06-05 21:56:23,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:23,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583064151] [2021-06-05 21:56:23,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:23,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:23,290 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:23,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:23,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583064151] [2021-06-05 21:56:23,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583064151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:23,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772376693] [2021-06-05 21:56:23,290 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:23,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:23,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:56:23,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:23,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:23,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:23,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:56:23,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:23,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:23,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:56:23,441 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:23,479 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-06-05 21:56:23,479 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:56:23,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 21:56:23,481 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:23,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:56:23,494 INFO L518 ElimStorePlain]: Eliminatee v_prenex_347 vanished before elimination [2021-06-05 21:56:23,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:56:23,494 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 21:56:23,532 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:23,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772376693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:23,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:23,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:56:23,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403003607] [2021-06-05 21:56:23,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:56:23,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:23,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:56:23,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:56:23,533 INFO L87 Difference]: Start difference. First operand 148 states and 322 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:23,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:23,868 INFO L93 Difference]: Finished difference Result 181 states and 380 transitions. [2021-06-05 21:56:23,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:56:23,868 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:23,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:23,869 INFO L225 Difference]: With dead ends: 181 [2021-06-05 21:56:23,869 INFO L226 Difference]: Without dead ends: 181 [2021-06-05 21:56:23,869 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 368.8ms TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:56:23,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-06-05 21:56:23,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 150. [2021-06-05 21:56:23,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.1946308724832213) internal successors, (327), 149 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:23,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 327 transitions. [2021-06-05 21:56:23,870 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 327 transitions. Word has length 19 [2021-06-05 21:56:23,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:23,870 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 327 transitions. [2021-06-05 21:56:23,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:23,870 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 327 transitions. [2021-06-05 21:56:23,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:23,871 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:23,871 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:24,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 422 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2232 [2021-06-05 21:56:24,071 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:24,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:24,071 INFO L82 PathProgramCache]: Analyzing trace with hash -898232384, now seen corresponding path program 422 times [2021-06-05 21:56:24,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:24,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934206818] [2021-06-05 21:56:24,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:24,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:24,152 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:24,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:24,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934206818] [2021-06-05 21:56:24,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934206818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:24,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125316326] [2021-06-05 21:56:24,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:24,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:56:24,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:24,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:56:24,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:24,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:24,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:24,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:56:24,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:24,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:24,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:56:24,295 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:24,341 INFO L628 ElimStorePlain]: treesize reduction 72, result has 39.5 percent of original size [2021-06-05 21:56:24,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:24,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:24,344 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:24,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:56:24,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:24,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 21:56:24,363 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:56:24,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:56:24,378 INFO L518 ElimStorePlain]: Eliminatee v_prenex_350 vanished before elimination [2021-06-05 21:56:24,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:56:24,379 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-06-05 21:56:24,421 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:24,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125316326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:24,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:24,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:56:24,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448384432] [2021-06-05 21:56:24,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:56:24,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:24,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:56:24,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:56:24,421 INFO L87 Difference]: Start difference. First operand 150 states and 327 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:24,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:24,798 INFO L93 Difference]: Finished difference Result 227 states and 472 transitions. [2021-06-05 21:56:24,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:56:24,798 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:24,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:24,799 INFO L225 Difference]: With dead ends: 227 [2021-06-05 21:56:24,799 INFO L226 Difference]: Without dead ends: 227 [2021-06-05 21:56:24,799 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 339.6ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:56:24,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-06-05 21:56:24,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 151. [2021-06-05 21:56:24,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.2133333333333334) internal successors, (332), 150 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:24,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 332 transitions. [2021-06-05 21:56:24,800 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 332 transitions. Word has length 19 [2021-06-05 21:56:24,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:24,800 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 332 transitions. [2021-06-05 21:56:24,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:24,800 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 332 transitions. [2021-06-05 21:56:24,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:24,801 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:24,801 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:25,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2239 [2021-06-05 21:56:25,005 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:25,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:25,005 INFO L82 PathProgramCache]: Analyzing trace with hash 513613948, now seen corresponding path program 423 times [2021-06-05 21:56:25,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:25,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407698061] [2021-06-05 21:56:25,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:25,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:25,098 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:25,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:25,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407698061] [2021-06-05 21:56:25,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407698061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:25,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32516066] [2021-06-05 21:56:25,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:25,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:56:25,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:25,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:56:25,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:25,267 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:25,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32516066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:25,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:25,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:56:25,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032344707] [2021-06-05 21:56:25,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:56:25,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:25,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:56:25,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:56:25,267 INFO L87 Difference]: Start difference. First operand 151 states and 332 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:25,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:25,564 INFO L93 Difference]: Finished difference Result 156 states and 338 transitions. [2021-06-05 21:56:25,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:56:25,565 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:25,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:25,565 INFO L225 Difference]: With dead ends: 156 [2021-06-05 21:56:25,565 INFO L226 Difference]: Without dead ends: 152 [2021-06-05 21:56:25,565 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 345.0ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:56:25,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-06-05 21:56:25,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2021-06-05 21:56:25,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.2066666666666666) internal successors, (331), 150 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:25,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 331 transitions. [2021-06-05 21:56:25,566 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 331 transitions. Word has length 19 [2021-06-05 21:56:25,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:25,566 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 331 transitions. [2021-06-05 21:56:25,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:25,566 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 331 transitions. [2021-06-05 21:56:25,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:25,567 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:25,567 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:25,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 424 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2243 [2021-06-05 21:56:25,767 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:25,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:25,767 INFO L82 PathProgramCache]: Analyzing trace with hash 600495182, now seen corresponding path program 424 times [2021-06-05 21:56:25,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:25,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30320685] [2021-06-05 21:56:25,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:25,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:25,840 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:25,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:25,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30320685] [2021-06-05 21:56:25,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30320685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:25,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017154516] [2021-06-05 21:56:25,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:25,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:56:25,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:25,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:56:25,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:25,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:25,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:25,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:25,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:25,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:25,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:25,990 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:26,008 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 21:56:26,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:26,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 21:56:26,011 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:56:26,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:56:26,017 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:56:26,017 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 21:56:26,035 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:26,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017154516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:26,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:26,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:56:26,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868277737] [2021-06-05 21:56:26,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:56:26,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:26,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:56:26,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:56:26,036 INFO L87 Difference]: Start difference. First operand 151 states and 331 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:26,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:26,194 INFO L93 Difference]: Finished difference Result 176 states and 380 transitions. [2021-06-05 21:56:26,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:56:26,194 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:26,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:26,195 INFO L225 Difference]: With dead ends: 176 [2021-06-05 21:56:26,195 INFO L226 Difference]: Without dead ends: 176 [2021-06-05 21:56:26,195 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 208.9ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:56:26,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-06-05 21:56:26,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 147. [2021-06-05 21:56:26,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.191780821917808) internal successors, (320), 146 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:26,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 320 transitions. [2021-06-05 21:56:26,196 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 320 transitions. Word has length 19 [2021-06-05 21:56:26,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:26,196 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 320 transitions. [2021-06-05 21:56:26,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:26,196 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 320 transitions. [2021-06-05 21:56:26,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:26,196 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:26,197 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:26,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 425 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2248 [2021-06-05 21:56:26,397 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:26,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:26,397 INFO L82 PathProgramCache]: Analyzing trace with hash 724682390, now seen corresponding path program 425 times [2021-06-05 21:56:26,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:26,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581972698] [2021-06-05 21:56:26,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:26,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:26,472 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:26,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:26,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581972698] [2021-06-05 21:56:26,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581972698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:26,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058348391] [2021-06-05 21:56:26,472 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:26,500 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:56:26,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:26,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:56:26,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:26,677 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:26,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058348391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:26,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:26,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:56:26,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990952970] [2021-06-05 21:56:26,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:56:26,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:26,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:56:26,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:56:26,678 INFO L87 Difference]: Start difference. First operand 147 states and 320 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:27,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:27,040 INFO L93 Difference]: Finished difference Result 205 states and 427 transitions. [2021-06-05 21:56:27,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:56:27,040 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:27,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:27,041 INFO L225 Difference]: With dead ends: 205 [2021-06-05 21:56:27,041 INFO L226 Difference]: Without dead ends: 202 [2021-06-05 21:56:27,041 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 375.9ms TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:56:27,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-05 21:56:27,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 156. [2021-06-05 21:56:27,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.2193548387096773) internal successors, (344), 155 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:27,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 344 transitions. [2021-06-05 21:56:27,042 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 344 transitions. Word has length 19 [2021-06-05 21:56:27,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:27,042 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 344 transitions. [2021-06-05 21:56:27,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:27,042 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 344 transitions. [2021-06-05 21:56:27,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:27,043 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:27,043 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:27,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2250,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:27,243 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:27,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:27,243 INFO L82 PathProgramCache]: Analyzing trace with hash 500750922, now seen corresponding path program 426 times [2021-06-05 21:56:27,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:27,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797576954] [2021-06-05 21:56:27,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:27,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:27,339 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:27,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:27,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797576954] [2021-06-05 21:56:27,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797576954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:27,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858762587] [2021-06-05 21:56:27,339 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:27,369 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:56:27,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:27,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:56:27,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:27,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:27,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:27,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:27,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:27,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:27,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:56:27,528 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:27,575 INFO L628 ElimStorePlain]: treesize reduction 82, result has 36.4 percent of original size [2021-06-05 21:56:27,575 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:56:27,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 21:56:27,578 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:27,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:56:27,593 INFO L518 ElimStorePlain]: Eliminatee v_prenex_355 vanished before elimination [2021-06-05 21:56:27,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:56:27,594 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-06-05 21:56:27,644 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:27,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858762587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:27,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:27,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:56:27,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186214103] [2021-06-05 21:56:27,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:56:27,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:27,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:56:27,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:56:27,645 INFO L87 Difference]: Start difference. First operand 156 states and 344 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:27,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:27,939 INFO L93 Difference]: Finished difference Result 189 states and 400 transitions. [2021-06-05 21:56:27,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:56:27,939 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:27,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:27,939 INFO L225 Difference]: With dead ends: 189 [2021-06-05 21:56:27,939 INFO L226 Difference]: Without dead ends: 189 [2021-06-05 21:56:27,939 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 288.8ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:56:27,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-06-05 21:56:27,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 156. [2021-06-05 21:56:27,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.2193548387096773) internal successors, (344), 155 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:27,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 344 transitions. [2021-06-05 21:56:27,941 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 344 transitions. Word has length 19 [2021-06-05 21:56:27,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:27,941 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 344 transitions. [2021-06-05 21:56:27,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:27,941 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 344 transitions. [2021-06-05 21:56:27,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:27,941 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:27,941 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:28,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2261,427 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:28,142 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:28,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:28,142 INFO L82 PathProgramCache]: Analyzing trace with hash -910039910, now seen corresponding path program 427 times [2021-06-05 21:56:28,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:28,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239266541] [2021-06-05 21:56:28,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:28,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:28,232 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:28,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:28,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239266541] [2021-06-05 21:56:28,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239266541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:28,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389883541] [2021-06-05 21:56:28,232 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:28,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:28,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:56:28,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:28,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:28,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:28,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:56:28,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:28,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:28,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:56:28,412 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:28,455 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-06-05 21:56:28,456 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:56:28,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 21:56:28,458 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:28,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:56:28,471 INFO L518 ElimStorePlain]: Eliminatee v_prenex_358 vanished before elimination [2021-06-05 21:56:28,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:56:28,472 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 21:56:28,501 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:28,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389883541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:28,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:28,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:56:28,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121045058] [2021-06-05 21:56:28,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:56:28,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:28,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:56:28,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:56:28,501 INFO L87 Difference]: Start difference. First operand 156 states and 344 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:29,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:29,016 INFO L93 Difference]: Finished difference Result 187 states and 393 transitions. [2021-06-05 21:56:29,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:56:29,017 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:29,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:29,017 INFO L225 Difference]: With dead ends: 187 [2021-06-05 21:56:29,017 INFO L226 Difference]: Without dead ends: 185 [2021-06-05 21:56:29,017 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 484.7ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:56:29,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-06-05 21:56:29,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 156. [2021-06-05 21:56:29,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.2129032258064516) internal successors, (343), 155 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:29,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 343 transitions. [2021-06-05 21:56:29,018 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 343 transitions. Word has length 19 [2021-06-05 21:56:29,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:29,018 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 343 transitions. [2021-06-05 21:56:29,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:29,019 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 343 transitions. [2021-06-05 21:56:29,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:29,019 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:29,019 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:29,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2267,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:29,219 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:29,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:29,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1860867662, now seen corresponding path program 428 times [2021-06-05 21:56:29,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:29,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60473130] [2021-06-05 21:56:29,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:29,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:29,297 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:29,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:29,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60473130] [2021-06-05 21:56:29,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60473130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:29,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603181877] [2021-06-05 21:56:29,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:29,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:56:29,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:29,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:56:29,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:29,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:29,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:29,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:56:29,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:29,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:29,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:56:29,462 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:29,513 INFO L628 ElimStorePlain]: treesize reduction 72, result has 39.5 percent of original size [2021-06-05 21:56:29,513 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:56:29,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:29,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:29,516 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:29,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:56:29,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:29,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 21:56:29,537 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:56:29,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:56:29,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:56:29,554 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-06-05 21:56:29,597 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:29,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603181877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:29,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:29,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:56:29,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747222231] [2021-06-05 21:56:29,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:56:29,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:29,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:56:29,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:56:29,598 INFO L87 Difference]: Start difference. First operand 156 states and 343 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:29,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:29,976 INFO L93 Difference]: Finished difference Result 221 states and 459 transitions. [2021-06-05 21:56:29,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:56:29,976 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:29,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:29,976 INFO L225 Difference]: With dead ends: 221 [2021-06-05 21:56:29,976 INFO L226 Difference]: Without dead ends: 221 [2021-06-05 21:56:29,976 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 386.4ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:56:29,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-06-05 21:56:29,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 155. [2021-06-05 21:56:29,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.2142857142857144) internal successors, (341), 154 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:29,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 341 transitions. [2021-06-05 21:56:29,978 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 341 transitions. Word has length 19 [2021-06-05 21:56:29,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:29,978 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 341 transitions. [2021-06-05 21:56:29,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:29,978 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 341 transitions. [2021-06-05 21:56:29,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:29,978 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:29,978 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:30,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2275,429 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:30,179 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:30,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:30,179 INFO L82 PathProgramCache]: Analyzing trace with hash -372184332, now seen corresponding path program 429 times [2021-06-05 21:56:30,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:30,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905679588] [2021-06-05 21:56:30,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:30,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:30,273 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:30,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:30,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905679588] [2021-06-05 21:56:30,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905679588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:30,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735756657] [2021-06-05 21:56:30,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:30,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:56:30,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:30,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:56:30,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:30,468 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:30,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735756657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:30,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:30,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:56:30,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906237046] [2021-06-05 21:56:30,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:56:30,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:30,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:56:30,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:56:30,469 INFO L87 Difference]: Start difference. First operand 155 states and 341 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:30,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:30,901 INFO L93 Difference]: Finished difference Result 163 states and 351 transitions. [2021-06-05 21:56:30,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:56:30,901 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:30,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:30,902 INFO L225 Difference]: With dead ends: 163 [2021-06-05 21:56:30,902 INFO L226 Difference]: Without dead ends: 159 [2021-06-05 21:56:30,902 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 422.1ms TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:56:30,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-06-05 21:56:30,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 155. [2021-06-05 21:56:30,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.207792207792208) internal successors, (340), 154 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:30,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 340 transitions. [2021-06-05 21:56:30,903 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 340 transitions. Word has length 19 [2021-06-05 21:56:30,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:30,903 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 340 transitions. [2021-06-05 21:56:30,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:30,903 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 340 transitions. [2021-06-05 21:56:30,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:30,903 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:30,903 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:31,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 430 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2279 [2021-06-05 21:56:31,104 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:31,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:31,104 INFO L82 PathProgramCache]: Analyzing trace with hash -285303098, now seen corresponding path program 430 times [2021-06-05 21:56:31,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:31,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727759275] [2021-06-05 21:56:31,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:31,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:31,184 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:31,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:31,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727759275] [2021-06-05 21:56:31,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727759275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:31,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28646940] [2021-06-05 21:56:31,184 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:31,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:56:31,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:31,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:56:31,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:31,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:31,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:31,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:31,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:31,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:31,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:31,361 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:31,379 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 21:56:31,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:31,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 21:56:31,382 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:56:31,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:56:31,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:56:31,388 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 21:56:31,407 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:31,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28646940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:31,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:31,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:56:31,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869442242] [2021-06-05 21:56:31,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:56:31,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:31,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:56:31,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:56:31,407 INFO L87 Difference]: Start difference. First operand 155 states and 340 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:31,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:31,799 INFO L93 Difference]: Finished difference Result 193 states and 409 transitions. [2021-06-05 21:56:31,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:56:31,799 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:31,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:31,799 INFO L225 Difference]: With dead ends: 193 [2021-06-05 21:56:31,799 INFO L226 Difference]: Without dead ends: 193 [2021-06-05 21:56:31,800 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 384.5ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:56:31,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-06-05 21:56:31,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 154. [2021-06-05 21:56:31,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.2091503267973858) internal successors, (338), 153 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:31,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 338 transitions. [2021-06-05 21:56:31,801 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 338 transitions. Word has length 19 [2021-06-05 21:56:31,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:31,801 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 338 transitions. [2021-06-05 21:56:31,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:31,801 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 338 transitions. [2021-06-05 21:56:31,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:31,801 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:31,801 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:32,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2284 [2021-06-05 21:56:32,002 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:32,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:32,002 INFO L82 PathProgramCache]: Analyzing trace with hash -878530598, now seen corresponding path program 431 times [2021-06-05 21:56:32,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:32,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799626489] [2021-06-05 21:56:32,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:32,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:32,078 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:32,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:32,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799626489] [2021-06-05 21:56:32,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799626489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:32,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300531997] [2021-06-05 21:56:32,079 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:32,104 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:56:32,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:32,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:56:32,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:32,252 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:32,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300531997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:32,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:32,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:56:32,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426861212] [2021-06-05 21:56:32,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:56:32,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:32,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:56:32,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:56:32,253 INFO L87 Difference]: Start difference. First operand 154 states and 338 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:32,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:32,497 INFO L93 Difference]: Finished difference Result 160 states and 345 transitions. [2021-06-05 21:56:32,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:56:32,497 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:32,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:32,497 INFO L225 Difference]: With dead ends: 160 [2021-06-05 21:56:32,497 INFO L226 Difference]: Without dead ends: 154 [2021-06-05 21:56:32,497 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 285.3ms TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:56:32,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-05 21:56:32,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2021-06-05 21:56:32,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.2026143790849675) internal successors, (337), 153 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:32,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 337 transitions. [2021-06-05 21:56:32,499 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 337 transitions. Word has length 19 [2021-06-05 21:56:32,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:32,499 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 337 transitions. [2021-06-05 21:56:32,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:32,499 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 337 transitions. [2021-06-05 21:56:32,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:32,499 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:32,499 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:32,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2286,432 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:32,700 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:32,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:32,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1902880078, now seen corresponding path program 432 times [2021-06-05 21:56:32,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:32,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382927549] [2021-06-05 21:56:32,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:32,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:32,772 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:32,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:32,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382927549] [2021-06-05 21:56:32,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382927549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:32,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473584852] [2021-06-05 21:56:32,772 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:32,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:56:32,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:32,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:56:32,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:32,941 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:32,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473584852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:32,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:32,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:56:32,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388350744] [2021-06-05 21:56:32,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:56:32,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:32,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:56:32,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:56:32,942 INFO L87 Difference]: Start difference. First operand 154 states and 337 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:33,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:33,094 INFO L93 Difference]: Finished difference Result 175 states and 373 transitions. [2021-06-05 21:56:33,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:56:33,094 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:33,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:33,094 INFO L225 Difference]: With dead ends: 175 [2021-06-05 21:56:33,094 INFO L226 Difference]: Without dead ends: 175 [2021-06-05 21:56:33,095 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 166.2ms TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:56:33,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-06-05 21:56:33,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 145. [2021-06-05 21:56:33,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1944444444444446) internal successors, (316), 144 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:33,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 316 transitions. [2021-06-05 21:56:33,096 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 316 transitions. Word has length 19 [2021-06-05 21:56:33,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:33,096 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 316 transitions. [2021-06-05 21:56:33,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:33,096 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 316 transitions. [2021-06-05 21:56:33,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:33,096 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:33,096 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:33,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2291,433 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:33,297 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:33,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:33,297 INFO L82 PathProgramCache]: Analyzing trace with hash -803588398, now seen corresponding path program 433 times [2021-06-05 21:56:33,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:33,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445347483] [2021-06-05 21:56:33,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:33,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:33,376 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:33,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:33,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445347483] [2021-06-05 21:56:33,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445347483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:33,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495813019] [2021-06-05 21:56:33,376 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:33,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:33,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:56:33,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:33,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:33,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:33,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:33,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:33,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:33,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:33,525 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:33,544 INFO L628 ElimStorePlain]: treesize reduction 40, result has 29.8 percent of original size [2021-06-05 21:56:33,544 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:56:33,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:56:33,545 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-06-05 21:56:33,563 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:33,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495813019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:33,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:33,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:56:33,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691339276] [2021-06-05 21:56:33,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:56:33,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:33,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:56:33,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:56:33,563 INFO L87 Difference]: Start difference. First operand 145 states and 316 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:33,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:33,746 INFO L93 Difference]: Finished difference Result 187 states and 400 transitions. [2021-06-05 21:56:33,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:56:33,746 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:33,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:33,747 INFO L225 Difference]: With dead ends: 187 [2021-06-05 21:56:33,747 INFO L226 Difference]: Without dead ends: 187 [2021-06-05 21:56:33,747 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 221.1ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:56:33,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-06-05 21:56:33,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 145. [2021-06-05 21:56:33,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1944444444444446) internal successors, (316), 144 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:33,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 316 transitions. [2021-06-05 21:56:33,748 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 316 transitions. Word has length 19 [2021-06-05 21:56:33,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:33,748 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 316 transitions. [2021-06-05 21:56:33,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:33,748 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 316 transitions. [2021-06-05 21:56:33,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:33,749 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:33,749 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:33,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2295,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:33,949 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:33,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:33,949 INFO L82 PathProgramCache]: Analyzing trace with hash -2048367454, now seen corresponding path program 434 times [2021-06-05 21:56:33,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:33,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132393756] [2021-06-05 21:56:33,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:33,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:34,028 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:34,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:34,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132393756] [2021-06-05 21:56:34,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132393756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:34,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919297826] [2021-06-05 21:56:34,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:34,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:56:34,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:34,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:56:34,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:34,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:34,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:34,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:34,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:34,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:34,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:34,180 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:34,197 INFO L628 ElimStorePlain]: treesize reduction 38, result has 30.9 percent of original size [2021-06-05 21:56:34,197 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:56:34,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:56:34,198 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-06-05 21:56:34,229 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:34,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919297826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:34,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:34,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:56:34,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771031668] [2021-06-05 21:56:34,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:56:34,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:34,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:56:34,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:56:34,229 INFO L87 Difference]: Start difference. First operand 145 states and 316 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:34,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:34,622 INFO L93 Difference]: Finished difference Result 197 states and 420 transitions. [2021-06-05 21:56:34,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:56:34,622 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:34,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:34,622 INFO L225 Difference]: With dead ends: 197 [2021-06-05 21:56:34,622 INFO L226 Difference]: Without dead ends: 197 [2021-06-05 21:56:34,622 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 390.5ms TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:56:34,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-06-05 21:56:34,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 145. [2021-06-05 21:56:34,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1944444444444446) internal successors, (316), 144 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:34,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 316 transitions. [2021-06-05 21:56:34,624 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 316 transitions. Word has length 19 [2021-06-05 21:56:34,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:34,624 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 316 transitions. [2021-06-05 21:56:34,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:34,624 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 316 transitions. [2021-06-05 21:56:34,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:34,624 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:34,624 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:34,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2296,435 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:34,824 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:34,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:34,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1236614354, now seen corresponding path program 435 times [2021-06-05 21:56:34,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:34,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118034163] [2021-06-05 21:56:34,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:34,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:34,902 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:34,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:34,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118034163] [2021-06-05 21:56:34,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118034163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:34,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417525310] [2021-06-05 21:56:34,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:34,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:56:34,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:34,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:56:34,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:35,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:35,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:35,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:56:35,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:35,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:35,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:35,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:35,068 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:35,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:35,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:35,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:56:35,071 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:35,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:35,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:56:35,074 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:35,106 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 21:56:35,106 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:56:35,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:56:35,107 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 21:56:35,145 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:35,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417525310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:35,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:35,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:56:35,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451369951] [2021-06-05 21:56:35,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:56:35,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:35,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:56:35,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:56:35,146 INFO L87 Difference]: Start difference. First operand 145 states and 316 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:35,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:35,834 INFO L93 Difference]: Finished difference Result 219 states and 456 transitions. [2021-06-05 21:56:35,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:56:35,835 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:35,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:35,835 INFO L225 Difference]: With dead ends: 219 [2021-06-05 21:56:35,835 INFO L226 Difference]: Without dead ends: 219 [2021-06-05 21:56:35,835 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 636.9ms TimeCoverageRelationStatistics Valid=141, Invalid=915, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:56:35,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-06-05 21:56:35,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 145. [2021-06-05 21:56:35,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1944444444444446) internal successors, (316), 144 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:35,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 316 transitions. [2021-06-05 21:56:35,837 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 316 transitions. Word has length 19 [2021-06-05 21:56:35,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:35,837 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 316 transitions. [2021-06-05 21:56:35,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:35,837 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 316 transitions. [2021-06-05 21:56:35,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:35,837 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:35,837 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:36,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2297,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:36,037 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:36,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:36,038 INFO L82 PathProgramCache]: Analyzing trace with hash -174176478, now seen corresponding path program 436 times [2021-06-05 21:56:36,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:36,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351892330] [2021-06-05 21:56:36,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:36,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:36,114 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:36,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:36,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351892330] [2021-06-05 21:56:36,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351892330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:36,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924691071] [2021-06-05 21:56:36,114 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:36,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:56:36,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:36,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:56:36,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:36,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:36,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:36,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:36,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:36,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:36,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:36,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:36,251 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:36,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:36,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:36,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:56:36,255 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:36,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:36,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:56:36,258 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:36,301 INFO L628 ElimStorePlain]: treesize reduction 71, result has 39.3 percent of original size [2021-06-05 21:56:36,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:36,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:56:36,304 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:56:36,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:56:36,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:56:36,323 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:141, output treesize:22 [2021-06-05 21:56:36,355 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:36,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924691071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:36,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:36,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:56:36,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828361304] [2021-06-05 21:56:36,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:56:36,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:36,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:56:36,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:56:36,356 INFO L87 Difference]: Start difference. First operand 145 states and 316 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:36,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:36,880 INFO L93 Difference]: Finished difference Result 186 states and 395 transitions. [2021-06-05 21:56:36,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:56:36,880 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:36,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:36,880 INFO L225 Difference]: With dead ends: 186 [2021-06-05 21:56:36,881 INFO L226 Difference]: Without dead ends: 184 [2021-06-05 21:56:36,881 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 522.1ms TimeCoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:56:36,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-06-05 21:56:36,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 145. [2021-06-05 21:56:36,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1875) internal successors, (315), 144 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:36,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 315 transitions. [2021-06-05 21:56:36,882 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 315 transitions. Word has length 19 [2021-06-05 21:56:36,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:36,882 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 315 transitions. [2021-06-05 21:56:36,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:36,882 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 315 transitions. [2021-06-05 21:56:36,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:36,882 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:36,882 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:37,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2307,437 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:37,083 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:37,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:37,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1698236202, now seen corresponding path program 437 times [2021-06-05 21:56:37,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:37,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46675647] [2021-06-05 21:56:37,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:37,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:37,180 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:37,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:37,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46675647] [2021-06-05 21:56:37,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46675647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:37,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205909674] [2021-06-05 21:56:37,181 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:37,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:56:37,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:37,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:56:37,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:37,353 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:37,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205909674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:37,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:37,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:56:37,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508483133] [2021-06-05 21:56:37,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:56:37,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:37,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:56:37,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:56:37,354 INFO L87 Difference]: Start difference. First operand 145 states and 315 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:37,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:37,729 INFO L93 Difference]: Finished difference Result 168 states and 362 transitions. [2021-06-05 21:56:37,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:56:37,730 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:37,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:37,730 INFO L225 Difference]: With dead ends: 168 [2021-06-05 21:56:37,730 INFO L226 Difference]: Without dead ends: 168 [2021-06-05 21:56:37,730 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 391.9ms TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:56:37,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-06-05 21:56:37,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 142. [2021-06-05 21:56:37,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.1914893617021276) internal successors, (309), 141 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:37,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 309 transitions. [2021-06-05 21:56:37,731 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 309 transitions. Word has length 19 [2021-06-05 21:56:37,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:37,732 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 309 transitions. [2021-06-05 21:56:37,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:37,732 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 309 transitions. [2021-06-05 21:56:37,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:37,732 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:37,732 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:37,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2311 [2021-06-05 21:56:37,932 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:37,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:37,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1360801562, now seen corresponding path program 438 times [2021-06-05 21:56:37,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:37,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213793157] [2021-06-05 21:56:37,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:37,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:38,013 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:38,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:38,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213793157] [2021-06-05 21:56:38,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213793157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:38,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776360762] [2021-06-05 21:56:38,014 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:38,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:56:38,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:38,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:56:38,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:38,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:38,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:38,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:56:38,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:38,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:38,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:56:38,173 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:38,187 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-06-05 21:56:38,188 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:56:38,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:56:38,188 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-06-05 21:56:38,204 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:38,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776360762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:38,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:38,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:56:38,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892601064] [2021-06-05 21:56:38,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:56:38,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:38,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:56:38,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:56:38,205 INFO L87 Difference]: Start difference. First operand 142 states and 309 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:38,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:38,407 INFO L93 Difference]: Finished difference Result 184 states and 393 transitions. [2021-06-05 21:56:38,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:56:38,407 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:38,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:38,407 INFO L225 Difference]: With dead ends: 184 [2021-06-05 21:56:38,407 INFO L226 Difference]: Without dead ends: 184 [2021-06-05 21:56:38,407 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 236.1ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:56:38,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-06-05 21:56:38,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 144. [2021-06-05 21:56:38,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.1888111888111887) internal successors, (313), 143 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:38,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 313 transitions. [2021-06-05 21:56:38,409 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 313 transitions. Word has length 19 [2021-06-05 21:56:38,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:38,409 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 313 transitions. [2021-06-05 21:56:38,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:38,409 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 313 transitions. [2021-06-05 21:56:38,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:38,409 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:38,409 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:38,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 439 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2321 [2021-06-05 21:56:38,610 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:38,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:38,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1000885044, now seen corresponding path program 439 times [2021-06-05 21:56:38,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:38,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051005690] [2021-06-05 21:56:38,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:38,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:38,702 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:38,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:38,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051005690] [2021-06-05 21:56:38,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051005690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:38,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883500868] [2021-06-05 21:56:38,702 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:38,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:38,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:56:38,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:38,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:38,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:38,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:56:38,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:38,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:38,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:38,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:38,852 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:38,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:38,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:38,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:56:38,855 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:38,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:38,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:56:38,858 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:38,890 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 21:56:38,890 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:56:38,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:56:38,891 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 21:56:38,916 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:38,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883500868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:38,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:38,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:56:38,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449455870] [2021-06-05 21:56:38,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:56:38,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:38,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:56:38,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:56:38,917 INFO L87 Difference]: Start difference. First operand 144 states and 313 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:39,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:39,212 INFO L93 Difference]: Finished difference Result 201 states and 428 transitions. [2021-06-05 21:56:39,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:56:39,213 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:39,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:39,213 INFO L225 Difference]: With dead ends: 201 [2021-06-05 21:56:39,213 INFO L226 Difference]: Without dead ends: 201 [2021-06-05 21:56:39,213 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 331.1ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:56:39,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-06-05 21:56:39,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 145. [2021-06-05 21:56:39,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1875) internal successors, (315), 144 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:39,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 315 transitions. [2021-06-05 21:56:39,214 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 315 transitions. Word has length 19 [2021-06-05 21:56:39,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:39,214 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 315 transitions. [2021-06-05 21:56:39,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:39,214 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 315 transitions. [2021-06-05 21:56:39,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:39,215 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:39,215 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:39,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2325,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:39,415 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:39,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:39,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1710932814, now seen corresponding path program 440 times [2021-06-05 21:56:39,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:39,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553087890] [2021-06-05 21:56:39,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:39,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:39,499 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:39,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:39,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553087890] [2021-06-05 21:56:39,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553087890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:39,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218454400] [2021-06-05 21:56:39,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:39,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:56:39,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:39,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:56:39,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:39,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:39,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:39,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:39,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:39,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:39,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:39,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:56:39,631 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:39,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:39,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:39,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:56:39,634 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:39,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:39,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:39,637 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:39,678 INFO L628 ElimStorePlain]: treesize reduction 65, result has 38.1 percent of original size [2021-06-05 21:56:39,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:39,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 21:56:39,682 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:56:39,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:56:39,701 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:56:39,701 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:133, output treesize:22 [2021-06-05 21:56:39,744 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:39,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218454400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:39,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:39,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:56:39,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242040892] [2021-06-05 21:56:39,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:56:39,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:39,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:56:39,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:56:39,745 INFO L87 Difference]: Start difference. First operand 145 states and 315 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:40,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:40,009 INFO L93 Difference]: Finished difference Result 169 states and 364 transitions. [2021-06-05 21:56:40,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:56:40,009 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:40,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:40,009 INFO L225 Difference]: With dead ends: 169 [2021-06-05 21:56:40,009 INFO L226 Difference]: Without dead ends: 169 [2021-06-05 21:56:40,010 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 279.4ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:56:40,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-06-05 21:56:40,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 143. [2021-06-05 21:56:40,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.1901408450704225) internal successors, (311), 142 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:40,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 311 transitions. [2021-06-05 21:56:40,011 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 311 transitions. Word has length 19 [2021-06-05 21:56:40,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:40,011 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 311 transitions. [2021-06-05 21:56:40,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:40,011 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 311 transitions. [2021-06-05 21:56:40,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:40,011 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:40,011 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:40,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2335 [2021-06-05 21:56:40,218 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:40,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:40,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1755968046, now seen corresponding path program 441 times [2021-06-05 21:56:40,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:40,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073789924] [2021-06-05 21:56:40,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:40,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:40,303 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:40,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:40,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073789924] [2021-06-05 21:56:40,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073789924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:40,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161899837] [2021-06-05 21:56:40,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:40,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:56:40,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:40,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:56:40,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:40,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:40,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:40,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:40,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:40,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:40,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:56:40,470 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:40,515 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-06-05 21:56:40,515 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:56:40,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 21:56:40,518 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:40,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:56:40,530 INFO L518 ElimStorePlain]: Eliminatee v_prenex_365 vanished before elimination [2021-06-05 21:56:40,531 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:56:40,531 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 21:56:40,575 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:40,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161899837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:40,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:40,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:56:40,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854250834] [2021-06-05 21:56:40,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:56:40,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:40,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:56:40,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:56:40,576 INFO L87 Difference]: Start difference. First operand 143 states and 311 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:40,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:40,921 INFO L93 Difference]: Finished difference Result 188 states and 393 transitions. [2021-06-05 21:56:40,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:56:40,921 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:40,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:40,921 INFO L225 Difference]: With dead ends: 188 [2021-06-05 21:56:40,922 INFO L226 Difference]: Without dead ends: 188 [2021-06-05 21:56:40,922 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 358.5ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:56:40,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-06-05 21:56:40,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 145. [2021-06-05 21:56:40,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1944444444444446) internal successors, (316), 144 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:40,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 316 transitions. [2021-06-05 21:56:40,923 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 316 transitions. Word has length 19 [2021-06-05 21:56:40,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:40,923 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 316 transitions. [2021-06-05 21:56:40,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:40,923 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 316 transitions. [2021-06-05 21:56:40,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:40,923 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:40,923 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:41,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2339,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:41,124 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:41,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:41,124 INFO L82 PathProgramCache]: Analyzing trace with hash 254217664, now seen corresponding path program 442 times [2021-06-05 21:56:41,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:41,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852641591] [2021-06-05 21:56:41,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:41,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:41,202 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:41,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:41,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852641591] [2021-06-05 21:56:41,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852641591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:41,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750689243] [2021-06-05 21:56:41,203 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:41,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:56:41,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:41,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:56:41,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:41,419 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:41,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750689243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:41,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:41,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:56:41,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90690655] [2021-06-05 21:56:41,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:56:41,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:41,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:56:41,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:56:41,419 INFO L87 Difference]: Start difference. First operand 145 states and 316 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:41,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:41,765 INFO L93 Difference]: Finished difference Result 227 states and 469 transitions. [2021-06-05 21:56:41,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:56:41,765 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:41,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:41,765 INFO L225 Difference]: With dead ends: 227 [2021-06-05 21:56:41,765 INFO L226 Difference]: Without dead ends: 227 [2021-06-05 21:56:41,765 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 311.7ms TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:56:41,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-06-05 21:56:41,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 146. [2021-06-05 21:56:41,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.213793103448276) internal successors, (321), 145 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:41,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 321 transitions. [2021-06-05 21:56:41,767 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 321 transitions. Word has length 19 [2021-06-05 21:56:41,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:41,767 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 321 transitions. [2021-06-05 21:56:41,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:41,767 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 321 transitions. [2021-06-05 21:56:41,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:41,767 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:41,767 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:41,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 443 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2346 [2021-06-05 21:56:41,968 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:41,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:41,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1666063996, now seen corresponding path program 443 times [2021-06-05 21:56:41,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:41,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444434206] [2021-06-05 21:56:41,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:41,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:42,056 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:42,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:42,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444434206] [2021-06-05 21:56:42,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444434206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:42,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290666692] [2021-06-05 21:56:42,056 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:42,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:56:42,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:42,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:56:42,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:42,220 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:42,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290666692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:42,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:42,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:56:42,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217869334] [2021-06-05 21:56:42,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:56:42,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:42,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:56:42,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:56:42,220 INFO L87 Difference]: Start difference. First operand 146 states and 321 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:42,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:42,514 INFO L93 Difference]: Finished difference Result 156 states and 337 transitions. [2021-06-05 21:56:42,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:56:42,515 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:42,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:42,515 INFO L225 Difference]: With dead ends: 156 [2021-06-05 21:56:42,515 INFO L226 Difference]: Without dead ends: 152 [2021-06-05 21:56:42,515 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 310.4ms TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:56:42,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-06-05 21:56:42,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 146. [2021-06-05 21:56:42,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.206896551724138) internal successors, (320), 145 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:42,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 320 transitions. [2021-06-05 21:56:42,516 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 320 transitions. Word has length 19 [2021-06-05 21:56:42,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:42,516 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 320 transitions. [2021-06-05 21:56:42,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:42,516 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 320 transitions. [2021-06-05 21:56:42,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:42,517 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:42,517 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:42,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 444 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2358 [2021-06-05 21:56:42,717 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:42,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:42,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1752945230, now seen corresponding path program 444 times [2021-06-05 21:56:42,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:42,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83423436] [2021-06-05 21:56:42,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:42,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:42,793 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:42,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:42,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83423436] [2021-06-05 21:56:42,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83423436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:42,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213186273] [2021-06-05 21:56:42,793 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:42,819 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:56:42,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:42,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:56:42,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:42,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:42,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:42,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:42,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:42,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:42,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:42,950 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:42,968 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 21:56:42,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:42,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 21:56:42,971 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:56:42,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:56:42,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:56:42,977 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 21:56:42,996 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:42,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213186273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:42,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:42,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:56:42,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111489593] [2021-06-05 21:56:42,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:56:42,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:42,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:56:42,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:56:42,996 INFO L87 Difference]: Start difference. First operand 146 states and 320 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:43,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:43,148 INFO L93 Difference]: Finished difference Result 179 states and 383 transitions. [2021-06-05 21:56:43,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:56:43,148 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:43,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:43,149 INFO L225 Difference]: With dead ends: 179 [2021-06-05 21:56:43,149 INFO L226 Difference]: Without dead ends: 179 [2021-06-05 21:56:43,149 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 202.8ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:56:43,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-06-05 21:56:43,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 141. [2021-06-05 21:56:43,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.192857142857143) internal successors, (307), 140 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:43,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 307 transitions. [2021-06-05 21:56:43,152 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 307 transitions. Word has length 19 [2021-06-05 21:56:43,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:43,152 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 307 transitions. [2021-06-05 21:56:43,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:43,152 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 307 transitions. [2021-06-05 21:56:43,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:43,153 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:43,153 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:43,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2364 [2021-06-05 21:56:43,353 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:43,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:43,353 INFO L82 PathProgramCache]: Analyzing trace with hash -329141342, now seen corresponding path program 445 times [2021-06-05 21:56:43,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:43,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89114434] [2021-06-05 21:56:43,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:43,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:43,429 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:43,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:43,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89114434] [2021-06-05 21:56:43,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89114434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:43,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872773876] [2021-06-05 21:56:43,430 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:43,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:43,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:56:43,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:43,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:43,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:43,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:56:43,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:43,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:43,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:56:43,575 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:43,589 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-06-05 21:56:43,589 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:56:43,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:56:43,590 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-06-05 21:56:43,593 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:43,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872773876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:43,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:43,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:56:43,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068631325] [2021-06-05 21:56:43,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:56:43,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:43,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:56:43,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:56:43,594 INFO L87 Difference]: Start difference. First operand 141 states and 307 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:43,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:43,719 INFO L93 Difference]: Finished difference Result 173 states and 371 transitions. [2021-06-05 21:56:43,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:56:43,720 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:43,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:43,720 INFO L225 Difference]: With dead ends: 173 [2021-06-05 21:56:43,720 INFO L226 Difference]: Without dead ends: 173 [2021-06-05 21:56:43,720 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 176.8ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:56:43,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-06-05 21:56:43,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 144. [2021-06-05 21:56:43,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.1888111888111887) internal successors, (313), 143 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:43,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 313 transitions. [2021-06-05 21:56:43,721 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 313 transitions. Word has length 19 [2021-06-05 21:56:43,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:43,721 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 313 transitions. [2021-06-05 21:56:43,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:43,721 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 313 transitions. [2021-06-05 21:56:43,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:43,722 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:43,722 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:43,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 446 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2366 [2021-06-05 21:56:43,922 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:43,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:43,922 INFO L82 PathProgramCache]: Analyzing trace with hash -689057860, now seen corresponding path program 446 times [2021-06-05 21:56:43,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:43,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923075208] [2021-06-05 21:56:43,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:43,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:44,008 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:44,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:44,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923075208] [2021-06-05 21:56:44,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923075208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:44,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628104176] [2021-06-05 21:56:44,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:44,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:56:44,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:44,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:56:44,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:44,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:44,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:44,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:56:44,132 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:44,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:44,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:44,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:44,136 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:44,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:44,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:44,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:56:44,140 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:44,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:44,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:44,143 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:44,185 INFO L628 ElimStorePlain]: treesize reduction 71, result has 39.3 percent of original size [2021-06-05 21:56:44,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:44,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:56:44,189 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:56:44,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:56:44,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:56:44,207 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:141, output treesize:22 [2021-06-05 21:56:44,246 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:44,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628104176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:44,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:44,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:56:44,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636497869] [2021-06-05 21:56:44,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:56:44,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:44,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:56:44,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:56:44,247 INFO L87 Difference]: Start difference. First operand 144 states and 313 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:44,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:44,449 INFO L93 Difference]: Finished difference Result 199 states and 423 transitions. [2021-06-05 21:56:44,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:56:44,449 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:44,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:44,449 INFO L225 Difference]: With dead ends: 199 [2021-06-05 21:56:44,449 INFO L226 Difference]: Without dead ends: 199 [2021-06-05 21:56:44,449 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 190.8ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:56:44,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-05 21:56:44,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 145. [2021-06-05 21:56:44,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1875) internal successors, (315), 144 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:44,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 315 transitions. [2021-06-05 21:56:44,451 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 315 transitions. Word has length 19 [2021-06-05 21:56:44,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:44,451 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 315 transitions. [2021-06-05 21:56:44,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:44,451 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 315 transitions. [2021-06-05 21:56:44,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:44,451 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:44,451 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:44,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 447 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2370 [2021-06-05 21:56:44,651 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:44,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:44,652 INFO L82 PathProgramCache]: Analyzing trace with hash 20989910, now seen corresponding path program 447 times [2021-06-05 21:56:44,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:44,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137577810] [2021-06-05 21:56:44,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:44,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:44,738 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:44,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:44,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137577810] [2021-06-05 21:56:44,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137577810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:44,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677747286] [2021-06-05 21:56:44,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:44,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:56:44,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:44,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:56:44,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:44,896 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:44,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677747286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:44,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:44,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:56:44,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296967331] [2021-06-05 21:56:44,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:56:44,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:44,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:56:44,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:56:44,897 INFO L87 Difference]: Start difference. First operand 145 states and 315 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:45,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:45,105 INFO L93 Difference]: Finished difference Result 160 states and 345 transitions. [2021-06-05 21:56:45,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:56:45,106 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:45,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:45,106 INFO L225 Difference]: With dead ends: 160 [2021-06-05 21:56:45,106 INFO L226 Difference]: Without dead ends: 160 [2021-06-05 21:56:45,106 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 224.5ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:56:45,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-06-05 21:56:45,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 143. [2021-06-05 21:56:45,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.1901408450704225) internal successors, (311), 142 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:45,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 311 transitions. [2021-06-05 21:56:45,107 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 311 transitions. Word has length 19 [2021-06-05 21:56:45,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:45,107 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 311 transitions. [2021-06-05 21:56:45,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:45,108 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 311 transitions. [2021-06-05 21:56:45,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:45,108 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:45,108 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:45,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2373,448 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:45,308 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:45,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:45,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1499125316, now seen corresponding path program 448 times [2021-06-05 21:56:45,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:45,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341357927] [2021-06-05 21:56:45,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:45,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:45,392 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:45,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:45,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341357927] [2021-06-05 21:56:45,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341357927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:45,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976594913] [2021-06-05 21:56:45,392 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:45,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:56:45,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:45,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:56:45,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:45,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:45,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:45,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:56:45,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:45,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:45,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:56:45,537 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:45,575 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-06-05 21:56:45,575 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:56:45,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 21:56:45,578 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:45,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:56:45,590 INFO L518 ElimStorePlain]: Eliminatee v_prenex_368 vanished before elimination [2021-06-05 21:56:45,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:56:45,591 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 21:56:45,616 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:45,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976594913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:45,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:45,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:56:45,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096534412] [2021-06-05 21:56:45,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:56:45,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:45,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:56:45,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:56:45,616 INFO L87 Difference]: Start difference. First operand 143 states and 311 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:45,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:45,907 INFO L93 Difference]: Finished difference Result 180 states and 378 transitions. [2021-06-05 21:56:45,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:56:45,907 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:45,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:45,907 INFO L225 Difference]: With dead ends: 180 [2021-06-05 21:56:45,907 INFO L226 Difference]: Without dead ends: 180 [2021-06-05 21:56:45,907 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 313.9ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:56:45,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-06-05 21:56:45,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 145. [2021-06-05 21:56:45,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1944444444444446) internal successors, (316), 144 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:45,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 316 transitions. [2021-06-05 21:56:45,909 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 316 transitions. Word has length 19 [2021-06-05 21:56:45,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:45,909 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 316 transitions. [2021-06-05 21:56:45,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:45,909 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 316 transitions. [2021-06-05 21:56:45,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:45,909 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:45,909 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:46,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2383,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:46,109 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:46,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:46,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1435725240, now seen corresponding path program 449 times [2021-06-05 21:56:46,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:46,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23958807] [2021-06-05 21:56:46,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:46,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:46,201 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:46,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:46,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23958807] [2021-06-05 21:56:46,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23958807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:46,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728303648] [2021-06-05 21:56:46,201 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:46,226 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:56:46,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:46,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:56:46,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:46,379 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:46,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728303648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:46,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:46,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:56:46,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433100127] [2021-06-05 21:56:46,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:56:46,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:46,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:56:46,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:56:46,380 INFO L87 Difference]: Start difference. First operand 145 states and 316 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:46,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:46,683 INFO L93 Difference]: Finished difference Result 211 states and 436 transitions. [2021-06-05 21:56:46,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:56:46,683 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:46,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:46,683 INFO L225 Difference]: With dead ends: 211 [2021-06-05 21:56:46,683 INFO L226 Difference]: Without dead ends: 211 [2021-06-05 21:56:46,684 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 367.7ms TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:56:46,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-06-05 21:56:46,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 146. [2021-06-05 21:56:46,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.213793103448276) internal successors, (321), 145 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:46,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 321 transitions. [2021-06-05 21:56:46,685 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 321 transitions. Word has length 19 [2021-06-05 21:56:46,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:46,685 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 321 transitions. [2021-06-05 21:56:46,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:46,685 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 321 transitions. [2021-06-05 21:56:46,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:46,685 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:46,685 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:46,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2390,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:46,886 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:46,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:46,886 INFO L82 PathProgramCache]: Analyzing trace with hash -23878908, now seen corresponding path program 450 times [2021-06-05 21:56:46,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:46,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305799808] [2021-06-05 21:56:46,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:46,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:46,973 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:46,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:46,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305799808] [2021-06-05 21:56:46,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305799808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:46,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147226877] [2021-06-05 21:56:46,973 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:46,998 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:56:46,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:46,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:56:46,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:47,138 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:47,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147226877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:47,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:47,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:56:47,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294751065] [2021-06-05 21:56:47,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:56:47,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:47,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:56:47,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:56:47,139 INFO L87 Difference]: Start difference. First operand 146 states and 321 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:47,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:47,362 INFO L93 Difference]: Finished difference Result 150 states and 325 transitions. [2021-06-05 21:56:47,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:56:47,362 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:47,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:47,362 INFO L225 Difference]: With dead ends: 150 [2021-06-05 21:56:47,362 INFO L226 Difference]: Without dead ends: 146 [2021-06-05 21:56:47,362 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 267.9ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:56:47,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-05 21:56:47,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2021-06-05 21:56:47,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.206896551724138) internal successors, (320), 145 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:47,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 320 transitions. [2021-06-05 21:56:47,364 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 320 transitions. Word has length 19 [2021-06-05 21:56:47,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:47,364 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 320 transitions. [2021-06-05 21:56:47,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:47,364 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 320 transitions. [2021-06-05 21:56:47,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:47,364 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:47,364 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:47,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 451 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2400 [2021-06-05 21:56:47,565 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:47,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:47,565 INFO L82 PathProgramCache]: Analyzing trace with hash 63002326, now seen corresponding path program 451 times [2021-06-05 21:56:47,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:47,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84563515] [2021-06-05 21:56:47,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:47,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:47,645 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:47,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:47,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84563515] [2021-06-05 21:56:47,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84563515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:47,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736001516] [2021-06-05 21:56:47,645 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:47,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:47,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:56:47,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:47,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:47,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:47,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:47,787 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:47,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:47,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:47,789 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:47,807 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 21:56:47,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:47,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 21:56:47,810 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:56:47,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:56:47,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:56:47,816 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 21:56:47,834 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:47,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736001516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:47,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:47,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:56:47,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315766054] [2021-06-05 21:56:47,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:56:47,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:47,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:56:47,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:56:47,835 INFO L87 Difference]: Start difference. First operand 146 states and 320 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:48,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:48,037 INFO L93 Difference]: Finished difference Result 168 states and 361 transitions. [2021-06-05 21:56:48,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:56:48,037 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:48,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:48,037 INFO L225 Difference]: With dead ends: 168 [2021-06-05 21:56:48,037 INFO L226 Difference]: Without dead ends: 168 [2021-06-05 21:56:48,037 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 210.0ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:56:48,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-06-05 21:56:48,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 142. [2021-06-05 21:56:48,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.1914893617021276) internal successors, (309), 141 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:48,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 309 transitions. [2021-06-05 21:56:48,039 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 309 transitions. Word has length 19 [2021-06-05 21:56:48,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:48,039 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 309 transitions. [2021-06-05 21:56:48,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:48,039 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 309 transitions. [2021-06-05 21:56:48,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:48,039 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:48,039 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:48,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2405 [2021-06-05 21:56:48,239 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:48,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:48,240 INFO L82 PathProgramCache]: Analyzing trace with hash -36741934, now seen corresponding path program 452 times [2021-06-05 21:56:48,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:48,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012916144] [2021-06-05 21:56:48,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:48,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:48,327 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:48,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:48,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012916144] [2021-06-05 21:56:48,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012916144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:48,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991193460] [2021-06-05 21:56:48,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:48,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:56:48,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:48,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:56:48,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:48,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:48,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:48,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:56:48,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:48,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:48,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:48,531 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:48,577 INFO L628 ElimStorePlain]: treesize reduction 78, result has 39.5 percent of original size [2021-06-05 21:56:48,577 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:56:48,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:48,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:56:48,580 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:48,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:56:48,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:48,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:56:48,600 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:56:48,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:56:48,615 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:56:48,615 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-06-05 21:56:48,661 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:48,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991193460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:48,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:48,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:56:48,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861467073] [2021-06-05 21:56:48,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:56:48,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:48,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:56:48,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:56:48,661 INFO L87 Difference]: Start difference. First operand 142 states and 309 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:48,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:48,878 INFO L93 Difference]: Finished difference Result 184 states and 385 transitions. [2021-06-05 21:56:48,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:56:48,878 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:48,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:48,878 INFO L225 Difference]: With dead ends: 184 [2021-06-05 21:56:48,878 INFO L226 Difference]: Without dead ends: 184 [2021-06-05 21:56:48,878 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 297.8ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:56:48,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-06-05 21:56:48,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 144. [2021-06-05 21:56:48,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.202797202797203) internal successors, (315), 143 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:48,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 315 transitions. [2021-06-05 21:56:48,880 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 315 transitions. Word has length 19 [2021-06-05 21:56:48,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:48,880 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 315 transitions. [2021-06-05 21:56:48,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:48,880 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 315 transitions. [2021-06-05 21:56:48,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:48,880 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:48,880 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:49,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2407,453 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:49,080 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:49,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:49,081 INFO L82 PathProgramCache]: Analyzing trace with hash -909677188, now seen corresponding path program 453 times [2021-06-05 21:56:49,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:49,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859273816] [2021-06-05 21:56:49,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:49,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:49,165 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:49,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:49,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859273816] [2021-06-05 21:56:49,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859273816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:49,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509084707] [2021-06-05 21:56:49,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:49,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:56:49,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:49,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:56:49,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:49,347 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:49,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509084707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:49,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:49,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:56:49,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849818449] [2021-06-05 21:56:49,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:56:49,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:49,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:56:49,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:56:49,348 INFO L87 Difference]: Start difference. First operand 144 states and 315 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:49,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:49,752 INFO L93 Difference]: Finished difference Result 152 states and 325 transitions. [2021-06-05 21:56:49,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:56:49,752 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:49,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:49,752 INFO L225 Difference]: With dead ends: 152 [2021-06-05 21:56:49,752 INFO L226 Difference]: Without dead ends: 148 [2021-06-05 21:56:49,752 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 421.3ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:56:49,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-06-05 21:56:49,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2021-06-05 21:56:49,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.195804195804196) internal successors, (314), 143 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:49,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 314 transitions. [2021-06-05 21:56:49,754 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 314 transitions. Word has length 19 [2021-06-05 21:56:49,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:49,754 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 314 transitions. [2021-06-05 21:56:49,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:49,754 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 314 transitions. [2021-06-05 21:56:49,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:49,754 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:49,754 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:49,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2413 [2021-06-05 21:56:49,969 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:49,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:49,969 INFO L82 PathProgramCache]: Analyzing trace with hash -822795954, now seen corresponding path program 454 times [2021-06-05 21:56:49,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:49,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105853834] [2021-06-05 21:56:49,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:49,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:50,045 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:50,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:50,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105853834] [2021-06-05 21:56:50,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105853834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:50,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888450933] [2021-06-05 21:56:50,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:50,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:56:50,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:50,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:56:50,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:50,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:50,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:50,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:50,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:50,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:50,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:50,211 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:50,229 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 21:56:50,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:50,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 21:56:50,232 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:56:50,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:56:50,238 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:56:50,238 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 21:56:50,256 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:50,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888450933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:50,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:50,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:56:50,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165066147] [2021-06-05 21:56:50,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:56:50,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:50,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:56:50,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:56:50,257 INFO L87 Difference]: Start difference. First operand 144 states and 314 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:50,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:50,738 INFO L93 Difference]: Finished difference Result 184 states and 389 transitions. [2021-06-05 21:56:50,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:56:50,738 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:50,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:50,738 INFO L225 Difference]: With dead ends: 184 [2021-06-05 21:56:50,738 INFO L226 Difference]: Without dead ends: 184 [2021-06-05 21:56:50,739 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 391.7ms TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:56:50,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-06-05 21:56:50,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 145. [2021-06-05 21:56:50,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.2083333333333335) internal successors, (318), 144 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:50,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 318 transitions. [2021-06-05 21:56:50,740 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 318 transitions. Word has length 19 [2021-06-05 21:56:50,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:50,740 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 318 transitions. [2021-06-05 21:56:50,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:50,740 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 318 transitions. [2021-06-05 21:56:50,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:50,740 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:50,740 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:50,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2418 [2021-06-05 21:56:50,941 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:50,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:50,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1416023454, now seen corresponding path program 455 times [2021-06-05 21:56:50,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:50,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558608046] [2021-06-05 21:56:50,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:50,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:51,014 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:51,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:51,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558608046] [2021-06-05 21:56:51,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558608046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:51,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585945212] [2021-06-05 21:56:51,014 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:51,039 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:56:51,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:51,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:56:51,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:51,182 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:51,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585945212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:51,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:51,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:56:51,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847762814] [2021-06-05 21:56:51,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:56:51,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:51,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:56:51,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:56:51,183 INFO L87 Difference]: Start difference. First operand 145 states and 318 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:51,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:51,410 INFO L93 Difference]: Finished difference Result 151 states and 325 transitions. [2021-06-05 21:56:51,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:56:51,410 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:51,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:51,410 INFO L225 Difference]: With dead ends: 151 [2021-06-05 21:56:51,410 INFO L226 Difference]: Without dead ends: 145 [2021-06-05 21:56:51,410 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 276.7ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:56:51,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-05 21:56:51,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-06-05 21:56:51,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.201388888888889) internal successors, (317), 144 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:51,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 317 transitions. [2021-06-05 21:56:51,412 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 317 transitions. Word has length 19 [2021-06-05 21:56:51,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:51,412 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 317 transitions. [2021-06-05 21:56:51,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:51,412 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 317 transitions. [2021-06-05 21:56:51,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:51,412 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:51,412 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:51,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 456 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2420 [2021-06-05 21:56:51,612 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:51,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:51,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1365387222, now seen corresponding path program 456 times [2021-06-05 21:56:51,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:51,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392144386] [2021-06-05 21:56:51,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:51,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:51,684 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:51,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:51,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392144386] [2021-06-05 21:56:51,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392144386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:51,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332768748] [2021-06-05 21:56:51,684 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:51,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:56:51,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:51,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:56:51,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:51,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:51,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:51,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:51,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:51,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:51,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:51,863 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:51,882 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 21:56:51,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:51,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 21:56:51,885 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:56:51,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:56:51,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:56:51,892 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 21:56:51,910 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:51,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332768748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:51,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:51,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:56:51,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415798979] [2021-06-05 21:56:51,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:56:51,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:51,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:56:51,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:56:51,911 INFO L87 Difference]: Start difference. First operand 145 states and 317 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:52,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:52,087 INFO L93 Difference]: Finished difference Result 170 states and 362 transitions. [2021-06-05 21:56:52,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:56:52,088 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:52,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:52,088 INFO L225 Difference]: With dead ends: 170 [2021-06-05 21:56:52,088 INFO L226 Difference]: Without dead ends: 170 [2021-06-05 21:56:52,088 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 192.8ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:56:52,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-06-05 21:56:52,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 143. [2021-06-05 21:56:52,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.1901408450704225) internal successors, (311), 142 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:52,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 311 transitions. [2021-06-05 21:56:52,089 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 311 transitions. Word has length 19 [2021-06-05 21:56:52,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:52,089 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 311 transitions. [2021-06-05 21:56:52,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:52,090 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 311 transitions. [2021-06-05 21:56:52,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:52,090 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:52,090 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:52,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2425 [2021-06-05 21:56:52,290 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:52,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:52,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1177763814, now seen corresponding path program 457 times [2021-06-05 21:56:52,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:52,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925194164] [2021-06-05 21:56:52,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:52,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:52,373 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:52,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:52,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925194164] [2021-06-05 21:56:52,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925194164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:52,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251557933] [2021-06-05 21:56:52,373 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 21:56:52,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:52,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:56:52,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:52,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:52,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:52,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:56:52,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:52,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:52,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:56:52,535 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:52,550 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-06-05 21:56:52,550 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:56:52,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:56:52,551 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-06-05 21:56:52,566 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:52,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251557933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:52,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:52,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:56:52,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206451670] [2021-06-05 21:56:52,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:56:52,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:52,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:56:52,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:56:52,567 INFO L87 Difference]: Start difference. First operand 143 states and 311 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:52,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:52,731 INFO L93 Difference]: Finished difference Result 174 states and 373 transitions. [2021-06-05 21:56:52,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:56:52,731 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:52,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:52,731 INFO L225 Difference]: With dead ends: 174 [2021-06-05 21:56:52,731 INFO L226 Difference]: Without dead ends: 174 [2021-06-05 21:56:52,731 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 202.1ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:56:52,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-06-05 21:56:52,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 145. [2021-06-05 21:56:52,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1875) internal successors, (315), 144 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:52,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 315 transitions. [2021-06-05 21:56:52,733 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 315 transitions. Word has length 19 [2021-06-05 21:56:52,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:52,733 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 315 transitions. [2021-06-05 21:56:52,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:52,733 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 315 transitions. [2021-06-05 21:56:52,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:52,733 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:52,733 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:52,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2427,458 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:52,934 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:52,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:52,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1537680332, now seen corresponding path program 458 times [2021-06-05 21:56:52,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:52,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319515221] [2021-06-05 21:56:52,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:52,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:53,006 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:53,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:53,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319515221] [2021-06-05 21:56:53,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319515221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:53,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003549076] [2021-06-05 21:56:53,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:53,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:56:53,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:53,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:56:53,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:53,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:53,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:53,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:53,128 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:53,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:53,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:53,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:53,131 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:53,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:53,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:53,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:56:53,135 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:53,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:53,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:56:53,138 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:53,178 INFO L628 ElimStorePlain]: treesize reduction 71, result has 39.3 percent of original size [2021-06-05 21:56:53,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:53,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:56:53,182 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:56:53,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:56:53,199 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:56:53,199 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:141, output treesize:22 [2021-06-05 21:56:53,240 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:53,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003549076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:53,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:53,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:56:53,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028810350] [2021-06-05 21:56:53,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:56:53,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:53,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:56:53,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:56:53,240 INFO L87 Difference]: Start difference. First operand 145 states and 315 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:53,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:53,376 INFO L93 Difference]: Finished difference Result 200 states and 425 transitions. [2021-06-05 21:56:53,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:56:53,377 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:53,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:53,377 INFO L225 Difference]: With dead ends: 200 [2021-06-05 21:56:53,377 INFO L226 Difference]: Without dead ends: 200 [2021-06-05 21:56:53,377 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 182.1ms TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:56:53,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-06-05 21:56:53,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 146. [2021-06-05 21:56:53,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.1862068965517243) internal successors, (317), 145 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:53,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 317 transitions. [2021-06-05 21:56:53,378 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 317 transitions. Word has length 19 [2021-06-05 21:56:53,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:53,378 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 317 transitions. [2021-06-05 21:56:53,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:53,378 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 317 transitions. [2021-06-05 21:56:53,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:53,379 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:53,379 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:53,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2431,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:53,579 INFO L430 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:53,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:53,579 INFO L82 PathProgramCache]: Analyzing trace with hash -827632562, now seen corresponding path program 459 times [2021-06-05 21:56:53,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:53,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155545398] [2021-06-05 21:56:53,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:53,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:53,665 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:53,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:53,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155545398] [2021-06-05 21:56:53,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155545398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:53,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692471225] [2021-06-05 21:56:53,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:53,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:56:53,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:53,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:56:53,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:53,818 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:53,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692471225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:53,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:53,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:56:53,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266438089] [2021-06-05 21:56:53,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:56:53,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:53,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:56:53,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:56:53,818 INFO L87 Difference]: Start difference. First operand 146 states and 317 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:54,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:54,045 INFO L93 Difference]: Finished difference Result 161 states and 347 transitions. [2021-06-05 21:56:54,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:56:54,045 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:54,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:54,045 INFO L225 Difference]: With dead ends: 161 [2021-06-05 21:56:54,045 INFO L226 Difference]: Without dead ends: 161 [2021-06-05 21:56:54,046 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 224.3ms TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:56:54,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-06-05 21:56:54,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 144. [2021-06-05 21:56:54,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.1888111888111887) internal successors, (313), 143 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:54,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 313 transitions. [2021-06-05 21:56:54,047 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 313 transitions. Word has length 19 [2021-06-05 21:56:54,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:54,047 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 313 transitions. [2021-06-05 21:56:54,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:54,047 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 313 transitions. [2021-06-05 21:56:54,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:54,047 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:54,047 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:54,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2434,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:54,248 INFO L430 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:54,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:54,248 INFO L82 PathProgramCache]: Analyzing trace with hash 650502844, now seen corresponding path program 460 times [2021-06-05 21:56:54,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:54,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127315717] [2021-06-05 21:56:54,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:54,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:54,335 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:54,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:54,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127315717] [2021-06-05 21:56:54,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127315717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:54,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667623923] [2021-06-05 21:56:54,335 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:54,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:56:54,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:54,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:56:54,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:54,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:54,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:54,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:56:54,480 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:54,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:54,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:56:54,484 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:54,522 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-06-05 21:56:54,523 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:56:54,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 21:56:54,525 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:54,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:56:54,538 INFO L518 ElimStorePlain]: Eliminatee v_prenex_376 vanished before elimination [2021-06-05 21:56:54,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:56:54,539 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 21:56:54,577 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:54,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667623923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:54,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:54,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:56:54,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558225953] [2021-06-05 21:56:54,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:56:54,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:54,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:56:54,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:56:54,578 INFO L87 Difference]: Start difference. First operand 144 states and 313 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:54,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:54,862 INFO L93 Difference]: Finished difference Result 182 states and 382 transitions. [2021-06-05 21:56:54,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:56:54,862 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:54,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:54,863 INFO L225 Difference]: With dead ends: 182 [2021-06-05 21:56:54,863 INFO L226 Difference]: Without dead ends: 182 [2021-06-05 21:56:54,863 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 319.8ms TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:56:54,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-06-05 21:56:54,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 146. [2021-06-05 21:56:54,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.193103448275862) internal successors, (318), 145 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:54,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 318 transitions. [2021-06-05 21:56:54,864 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 318 transitions. Word has length 19 [2021-06-05 21:56:54,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:54,864 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 318 transitions. [2021-06-05 21:56:54,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:54,864 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 318 transitions. [2021-06-05 21:56:54,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:54,865 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:54,865 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:55,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2444 [2021-06-05 21:56:55,065 INFO L430 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:55,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:55,065 INFO L82 PathProgramCache]: Analyzing trace with hash 2010619584, now seen corresponding path program 461 times [2021-06-05 21:56:55,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:55,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267904073] [2021-06-05 21:56:55,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:55,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:55,142 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:55,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:55,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267904073] [2021-06-05 21:56:55,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267904073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:55,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119131915] [2021-06-05 21:56:55,142 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:55,168 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:56:55,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:55,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:56:55,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:55,336 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:55,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119131915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:55,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:55,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:56:55,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960622931] [2021-06-05 21:56:55,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:56:55,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:55,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:56:55,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:56:55,337 INFO L87 Difference]: Start difference. First operand 146 states and 318 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:55,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:55,594 INFO L93 Difference]: Finished difference Result 205 states and 423 transitions. [2021-06-05 21:56:55,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:56:55,594 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:55,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:55,595 INFO L225 Difference]: With dead ends: 205 [2021-06-05 21:56:55,595 INFO L226 Difference]: Without dead ends: 205 [2021-06-05 21:56:55,595 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 255.7ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:56:55,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-05 21:56:55,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 147. [2021-06-05 21:56:55,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.212328767123288) internal successors, (323), 146 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:55,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 323 transitions. [2021-06-05 21:56:55,596 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 323 transitions. Word has length 19 [2021-06-05 21:56:55,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:55,596 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 323 transitions. [2021-06-05 21:56:55,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:55,596 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 323 transitions. [2021-06-05 21:56:55,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:55,597 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:55,597 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:55,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2451,462 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:55,813 INFO L430 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:55,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:55,813 INFO L82 PathProgramCache]: Analyzing trace with hash -872501380, now seen corresponding path program 462 times [2021-06-05 21:56:55,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:55,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911112648] [2021-06-05 21:56:55,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:55,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:55,894 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:55,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:55,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911112648] [2021-06-05 21:56:55,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911112648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:55,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804367310] [2021-06-05 21:56:55,894 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:55,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:56:55,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:55,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:56:55,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:56,054 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:56,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804367310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:56,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:56,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:56:56,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318756962] [2021-06-05 21:56:56,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:56:56,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:56,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:56:56,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:56:56,055 INFO L87 Difference]: Start difference. First operand 147 states and 323 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:56,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:56,239 INFO L93 Difference]: Finished difference Result 151 states and 327 transitions. [2021-06-05 21:56:56,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:56:56,239 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:56,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:56,239 INFO L225 Difference]: With dead ends: 151 [2021-06-05 21:56:56,239 INFO L226 Difference]: Without dead ends: 147 [2021-06-05 21:56:56,240 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 225.3ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:56:56,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-05 21:56:56,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2021-06-05 21:56:56,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.2054794520547945) internal successors, (322), 146 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:56,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 322 transitions. [2021-06-05 21:56:56,241 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 322 transitions. Word has length 19 [2021-06-05 21:56:56,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:56,241 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 322 transitions. [2021-06-05 21:56:56,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:56,241 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 322 transitions. [2021-06-05 21:56:56,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:56,241 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:56,241 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:56,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 463 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2463 [2021-06-05 21:56:56,442 INFO L430 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:56,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:56,442 INFO L82 PathProgramCache]: Analyzing trace with hash -785620146, now seen corresponding path program 463 times [2021-06-05 21:56:56,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:56,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649077271] [2021-06-05 21:56:56,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:56,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:56,526 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:56,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:56,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649077271] [2021-06-05 21:56:56,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649077271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:56,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696012640] [2021-06-05 21:56:56,526 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:56,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:56,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:56:56,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:56,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:56,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:56,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:56,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:56,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:56,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:56,673 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:56,690 INFO L628 ElimStorePlain]: treesize reduction 34, result has 30.6 percent of original size [2021-06-05 21:56:56,690 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:56:56,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:56:56,691 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 21:56:56,709 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:56,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696012640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:56,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:56,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:56:56,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756757026] [2021-06-05 21:56:56,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:56:56,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:56,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:56:56,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:56:56,710 INFO L87 Difference]: Start difference. First operand 147 states and 322 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:56,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:56,888 INFO L93 Difference]: Finished difference Result 165 states and 353 transitions. [2021-06-05 21:56:56,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:56:56,888 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:56,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:56,888 INFO L225 Difference]: With dead ends: 165 [2021-06-05 21:56:56,888 INFO L226 Difference]: Without dead ends: 165 [2021-06-05 21:56:56,889 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 227.3ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:56:56,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-06-05 21:56:56,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 143. [2021-06-05 21:56:56,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.1901408450704225) internal successors, (311), 142 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:56,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 311 transitions. [2021-06-05 21:56:56,890 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 311 transitions. Word has length 19 [2021-06-05 21:56:56,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:56,890 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 311 transitions. [2021-06-05 21:56:56,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:56,890 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 311 transitions. [2021-06-05 21:56:56,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:56,890 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:56,890 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:57,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2467 [2021-06-05 21:56:57,091 INFO L430 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:57,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:57,091 INFO L82 PathProgramCache]: Analyzing trace with hash -885364406, now seen corresponding path program 464 times [2021-06-05 21:56:57,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:57,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227468920] [2021-06-05 21:56:57,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:57,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:57,180 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:57,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:57,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227468920] [2021-06-05 21:56:57,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227468920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:57,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551956283] [2021-06-05 21:56:57,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:57,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:56:57,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:57,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:56:57,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:57,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:57,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:57,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:56:57,363 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:57,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:57,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:56:57,367 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:57,414 INFO L628 ElimStorePlain]: treesize reduction 74, result has 42.6 percent of original size [2021-06-05 21:56:57,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:56:57,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:56:57,418 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:56:57,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:56:57,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 21:56:57,437 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:56:57,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:56:57,452 INFO L518 ElimStorePlain]: Eliminatee v_prenex_379 vanished before elimination [2021-06-05 21:56:57,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:56:57,453 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-06-05 21:56:57,501 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:57,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551956283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:57,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:57,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:56:57,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281356490] [2021-06-05 21:56:57,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:56:57,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:57,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:56:57,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:56:57,502 INFO L87 Difference]: Start difference. First operand 143 states and 311 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:57,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:57,772 INFO L93 Difference]: Finished difference Result 178 states and 372 transitions. [2021-06-05 21:56:57,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:56:57,772 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:57,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:57,773 INFO L225 Difference]: With dead ends: 178 [2021-06-05 21:56:57,773 INFO L226 Difference]: Without dead ends: 178 [2021-06-05 21:56:57,773 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 311.4ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:56:57,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-06-05 21:56:57,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 145. [2021-06-05 21:56:57,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1944444444444446) internal successors, (316), 144 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:57,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 316 transitions. [2021-06-05 21:56:57,774 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 316 transitions. Word has length 19 [2021-06-05 21:56:57,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:57,774 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 316 transitions. [2021-06-05 21:56:57,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:57,774 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 316 transitions. [2021-06-05 21:56:57,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:57,774 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:57,774 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:57,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2469,465 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:57,990 INFO L430 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:57,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:57,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1124821304, now seen corresponding path program 465 times [2021-06-05 21:56:57,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:57,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294451849] [2021-06-05 21:56:57,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:57,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:58,087 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:58,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:58,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294451849] [2021-06-05 21:56:58,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294451849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:58,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567054194] [2021-06-05 21:56:58,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:58,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:56:58,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:58,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:56:58,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:58,305 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:58,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567054194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:58,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:58,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:56:58,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707777676] [2021-06-05 21:56:58,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:56:58,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:58,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:56:58,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:56:58,306 INFO L87 Difference]: Start difference. First operand 145 states and 316 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:58,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:58,777 INFO L93 Difference]: Finished difference Result 220 states and 452 transitions. [2021-06-05 21:56:58,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:56:58,778 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:58,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:58,778 INFO L225 Difference]: With dead ends: 220 [2021-06-05 21:56:58,778 INFO L226 Difference]: Without dead ends: 220 [2021-06-05 21:56:58,778 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 499.4ms TimeCoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:56:58,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-06-05 21:56:58,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 147. [2021-06-05 21:56:58,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.219178082191781) internal successors, (324), 146 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:58,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 324 transitions. [2021-06-05 21:56:58,780 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 324 transitions. Word has length 19 [2021-06-05 21:56:58,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:58,780 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 324 transitions. [2021-06-05 21:56:58,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:58,780 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 324 transitions. [2021-06-05 21:56:58,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:58,780 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:58,780 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:58,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 466 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2475 [2021-06-05 21:56:58,980 INFO L430 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:58,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:58,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1758299660, now seen corresponding path program 466 times [2021-06-05 21:56:58,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:58,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255408921] [2021-06-05 21:56:58,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:58,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:59,078 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:59,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:59,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255408921] [2021-06-05 21:56:59,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255408921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:59,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537627825] [2021-06-05 21:56:59,078 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:59,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:56:59,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:56:59,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:56:59,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:56:59,306 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:59,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537627825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:59,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:56:59,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:56:59,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759502321] [2021-06-05 21:56:59,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:56:59,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:56:59,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:56:59,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:56:59,307 INFO L87 Difference]: Start difference. First operand 147 states and 324 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:59,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:56:59,709 INFO L93 Difference]: Finished difference Result 155 states and 334 transitions. [2021-06-05 21:56:59,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:56:59,710 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:56:59,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:56:59,710 INFO L225 Difference]: With dead ends: 155 [2021-06-05 21:56:59,710 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 21:56:59,710 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 444.2ms TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:56:59,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 21:56:59,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 147. [2021-06-05 21:56:59,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.212328767123288) internal successors, (323), 146 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:59,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 323 transitions. [2021-06-05 21:56:59,711 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 323 transitions. Word has length 19 [2021-06-05 21:56:59,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:56:59,711 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 323 transitions. [2021-06-05 21:56:59,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:56:59,711 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 323 transitions. [2021-06-05 21:56:59,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:56:59,712 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:56:59,712 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:56:59,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2487,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:56:59,912 INFO L430 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:56:59,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:56:59,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1671418426, now seen corresponding path program 467 times [2021-06-05 21:56:59,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:56:59,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299588700] [2021-06-05 21:56:59,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:56:59,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:56:59,990 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:56:59,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:56:59,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299588700] [2021-06-05 21:56:59,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299588700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:56:59,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960557043] [2021-06-05 21:56:59,990 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:00,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:57:00,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:00,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:57:00,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:00,162 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:00,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960557043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:00,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:00,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:57:00,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278558474] [2021-06-05 21:57:00,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:57:00,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:00,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:57:00,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:57:00,163 INFO L87 Difference]: Start difference. First operand 147 states and 323 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:00,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:00,531 INFO L93 Difference]: Finished difference Result 180 states and 383 transitions. [2021-06-05 21:57:00,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:57:00,531 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:00,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:00,531 INFO L225 Difference]: With dead ends: 180 [2021-06-05 21:57:00,531 INFO L226 Difference]: Without dead ends: 180 [2021-06-05 21:57:00,531 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 420.0ms TimeCoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:57:00,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-06-05 21:57:00,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 146. [2021-06-05 21:57:00,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.213793103448276) internal successors, (321), 145 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:00,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 321 transitions. [2021-06-05 21:57:00,533 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 321 transitions. Word has length 19 [2021-06-05 21:57:00,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:00,533 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 321 transitions. [2021-06-05 21:57:00,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:00,533 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 321 transitions. [2021-06-05 21:57:00,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:00,533 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:00,533 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:00,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2492,468 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:00,734 INFO L430 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:00,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:00,734 INFO L82 PathProgramCache]: Analyzing trace with hash 2030321370, now seen corresponding path program 468 times [2021-06-05 21:57:00,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:00,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493375751] [2021-06-05 21:57:00,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:00,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:00,844 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:00,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:00,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493375751] [2021-06-05 21:57:00,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493375751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:00,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284410919] [2021-06-05 21:57:00,844 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:00,869 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:57:00,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:00,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:57:00,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:01,013 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:01,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284410919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:01,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:01,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:57:01,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388518087] [2021-06-05 21:57:01,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:57:01,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:01,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:57:01,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:57:01,013 INFO L87 Difference]: Start difference. First operand 146 states and 321 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:01,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:01,236 INFO L93 Difference]: Finished difference Result 152 states and 328 transitions. [2021-06-05 21:57:01,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:57:01,237 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:01,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:01,237 INFO L225 Difference]: With dead ends: 152 [2021-06-05 21:57:01,237 INFO L226 Difference]: Without dead ends: 146 [2021-06-05 21:57:01,237 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 271.0ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:57:01,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-05 21:57:01,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2021-06-05 21:57:01,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.206896551724138) internal successors, (320), 145 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:01,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 320 transitions. [2021-06-05 21:57:01,238 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 320 transitions. Word has length 19 [2021-06-05 21:57:01,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:01,238 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 320 transitions. [2021-06-05 21:57:01,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:01,238 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 320 transitions. [2021-06-05 21:57:01,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:01,238 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:01,239 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:01,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 469 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2496 [2021-06-05 21:57:01,439 INFO L430 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:01,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:01,439 INFO L82 PathProgramCache]: Analyzing trace with hash 516764750, now seen corresponding path program 469 times [2021-06-05 21:57:01,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:01,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380852594] [2021-06-05 21:57:01,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:01,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:01,514 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:01,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:01,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380852594] [2021-06-05 21:57:01,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380852594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:01,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981482751] [2021-06-05 21:57:01,514 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:01,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:01,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:57:01,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:01,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:01,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:01,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:57:01,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:01,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:01,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:57:01,669 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:01,687 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 21:57:01,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:01,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 21:57:01,690 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:57:01,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:57:01,696 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:57:01,696 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 21:57:01,718 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:01,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981482751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:01,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:01,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:57:01,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795388240] [2021-06-05 21:57:01,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:57:01,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:01,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:57:01,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:57:01,719 INFO L87 Difference]: Start difference. First operand 146 states and 320 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:01,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:01,851 INFO L93 Difference]: Finished difference Result 170 states and 361 transitions. [2021-06-05 21:57:01,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:57:01,852 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:01,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:01,852 INFO L225 Difference]: With dead ends: 170 [2021-06-05 21:57:01,852 INFO L226 Difference]: Without dead ends: 170 [2021-06-05 21:57:01,852 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 194.5ms TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:57:01,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-06-05 21:57:01,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 141. [2021-06-05 21:57:01,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.1857142857142855) internal successors, (306), 140 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:01,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 306 transitions. [2021-06-05 21:57:01,853 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 306 transitions. Word has length 19 [2021-06-05 21:57:01,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:01,853 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 306 transitions. [2021-06-05 21:57:01,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:01,853 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 306 transitions. [2021-06-05 21:57:01,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:01,854 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:01,854 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:02,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 470 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2500 [2021-06-05 21:57:02,054 INFO L430 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:02,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:02,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1925238340, now seen corresponding path program 470 times [2021-06-05 21:57:02,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:02,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202061443] [2021-06-05 21:57:02,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:02,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:02,155 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:02,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:02,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202061443] [2021-06-05 21:57:02,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202061443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:02,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692494916] [2021-06-05 21:57:02,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:02,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:57:02,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:02,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:57:02,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:02,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:02,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:02,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:57:02,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:02,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:02,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:57:02,361 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:02,406 INFO L628 ElimStorePlain]: treesize reduction 76, result has 41.1 percent of original size [2021-06-05 21:57:02,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:02,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:57:02,410 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:57:02,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:57:02,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 21:57:02,428 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:02,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:57:02,443 INFO L518 ElimStorePlain]: Eliminatee v_prenex_386 vanished before elimination [2021-06-05 21:57:02,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:57:02,444 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-06-05 21:57:02,489 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:02,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692494916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:02,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:02,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:57:02,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514526494] [2021-06-05 21:57:02,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:57:02,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:02,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:57:02,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:57:02,490 INFO L87 Difference]: Start difference. First operand 141 states and 306 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:02,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:02,758 INFO L93 Difference]: Finished difference Result 184 states and 384 transitions. [2021-06-05 21:57:02,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:57:02,758 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:02,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:02,759 INFO L225 Difference]: With dead ends: 184 [2021-06-05 21:57:02,759 INFO L226 Difference]: Without dead ends: 184 [2021-06-05 21:57:02,759 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 311.6ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:57:02,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-06-05 21:57:02,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 141. [2021-06-05 21:57:02,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.1857142857142855) internal successors, (306), 140 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:02,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 306 transitions. [2021-06-05 21:57:02,760 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 306 transitions. Word has length 19 [2021-06-05 21:57:02,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:02,760 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 306 transitions. [2021-06-05 21:57:02,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:02,760 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 306 transitions. [2021-06-05 21:57:02,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:02,760 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:02,760 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:02,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2502 [2021-06-05 21:57:02,961 INFO L430 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:02,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:02,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1215190570, now seen corresponding path program 471 times [2021-06-05 21:57:02,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:02,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391766780] [2021-06-05 21:57:02,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:02,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:03,040 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:03,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:03,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391766780] [2021-06-05 21:57:03,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391766780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:03,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834380997] [2021-06-05 21:57:03,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:03,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:57:03,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:03,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:57:03,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:03,259 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:03,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834380997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:03,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:03,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:57:03,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615833313] [2021-06-05 21:57:03,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:57:03,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:03,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:57:03,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:57:03,260 INFO L87 Difference]: Start difference. First operand 141 states and 306 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:03,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:03,945 INFO L93 Difference]: Finished difference Result 211 states and 433 transitions. [2021-06-05 21:57:03,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:57:03,945 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:03,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:03,945 INFO L225 Difference]: With dead ends: 211 [2021-06-05 21:57:03,945 INFO L226 Difference]: Without dead ends: 211 [2021-06-05 21:57:03,946 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 622.8ms TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:57:03,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-06-05 21:57:03,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 144. [2021-06-05 21:57:03,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.2167832167832167) internal successors, (317), 143 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:03,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 317 transitions. [2021-06-05 21:57:03,947 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 317 transitions. Word has length 19 [2021-06-05 21:57:03,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:03,947 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 317 transitions. [2021-06-05 21:57:03,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:03,947 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 317 transitions. [2021-06-05 21:57:03,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:03,947 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:03,947 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:04,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2508,472 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:04,148 INFO L430 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:04,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:04,148 INFO L82 PathProgramCache]: Analyzing trace with hash 846724732, now seen corresponding path program 472 times [2021-06-05 21:57:04,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:04,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826807461] [2021-06-05 21:57:04,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:04,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:04,258 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:04,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:04,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826807461] [2021-06-05 21:57:04,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826807461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:04,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91255467] [2021-06-05 21:57:04,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:04,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:57:04,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:04,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:57:04,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:04,469 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:04,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91255467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:04,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:04,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:57:04,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169877088] [2021-06-05 21:57:04,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:57:04,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:04,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:57:04,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:57:04,470 INFO L87 Difference]: Start difference. First operand 144 states and 317 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:04,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:04,938 INFO L93 Difference]: Finished difference Result 155 states and 332 transitions. [2021-06-05 21:57:04,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:57:04,938 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:04,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:04,939 INFO L225 Difference]: With dead ends: 155 [2021-06-05 21:57:04,939 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 21:57:04,939 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 534.7ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:57:04,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 21:57:04,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 144. [2021-06-05 21:57:04,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.2097902097902096) internal successors, (316), 143 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:04,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 316 transitions. [2021-06-05 21:57:04,940 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 316 transitions. Word has length 19 [2021-06-05 21:57:04,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:04,940 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 316 transitions. [2021-06-05 21:57:04,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:04,940 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 316 transitions. [2021-06-05 21:57:04,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:04,940 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:04,940 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:05,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2520,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:05,141 INFO L430 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:05,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:05,141 INFO L82 PathProgramCache]: Analyzing trace with hash 933605966, now seen corresponding path program 473 times [2021-06-05 21:57:05,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:05,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532558807] [2021-06-05 21:57:05,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:05,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:05,222 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:05,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:05,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532558807] [2021-06-05 21:57:05,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532558807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:05,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986342666] [2021-06-05 21:57:05,223 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:05,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:57:05,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:05,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:57:05,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:05,420 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:05,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986342666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:05,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:05,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:57:05,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237780659] [2021-06-05 21:57:05,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:57:05,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:05,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:57:05,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:57:05,421 INFO L87 Difference]: Start difference. First operand 144 states and 316 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:05,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:05,886 INFO L93 Difference]: Finished difference Result 186 states and 394 transitions. [2021-06-05 21:57:05,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:57:05,886 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:05,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:05,886 INFO L225 Difference]: With dead ends: 186 [2021-06-05 21:57:05,886 INFO L226 Difference]: Without dead ends: 186 [2021-06-05 21:57:05,886 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 470.8ms TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:57:05,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-06-05 21:57:05,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 143. [2021-06-05 21:57:05,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.211267605633803) internal successors, (314), 142 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:05,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 314 transitions. [2021-06-05 21:57:05,888 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 314 transitions. Word has length 19 [2021-06-05 21:57:05,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:05,888 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 314 transitions. [2021-06-05 21:57:05,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:05,888 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 314 transitions. [2021-06-05 21:57:05,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:05,888 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:05,888 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:06,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 474 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2525 [2021-06-05 21:57:06,088 INFO L430 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:06,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:06,089 INFO L82 PathProgramCache]: Analyzing trace with hash 340378466, now seen corresponding path program 474 times [2021-06-05 21:57:06,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:06,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765886581] [2021-06-05 21:57:06,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:06,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:06,195 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:06,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:06,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765886581] [2021-06-05 21:57:06,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765886581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:06,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481301726] [2021-06-05 21:57:06,195 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:06,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:57:06,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:06,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:57:06,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:06,397 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:06,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481301726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:06,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:06,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:57:06,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566209255] [2021-06-05 21:57:06,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:57:06,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:06,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:57:06,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:57:06,398 INFO L87 Difference]: Start difference. First operand 143 states and 314 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:06,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:06,617 INFO L93 Difference]: Finished difference Result 153 states and 327 transitions. [2021-06-05 21:57:06,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:57:06,618 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:06,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:06,618 INFO L225 Difference]: With dead ends: 153 [2021-06-05 21:57:06,618 INFO L226 Difference]: Without dead ends: 147 [2021-06-05 21:57:06,618 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 309.9ms TimeCoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:57:06,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-05 21:57:06,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 143. [2021-06-05 21:57:06,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.204225352112676) internal successors, (313), 142 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:06,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 313 transitions. [2021-06-05 21:57:06,619 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 313 transitions. Word has length 19 [2021-06-05 21:57:06,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:06,619 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 313 transitions. [2021-06-05 21:57:06,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:06,619 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 313 transitions. [2021-06-05 21:57:06,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:06,619 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:06,619 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:06,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2529,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:06,820 INFO L430 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:06,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:06,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1173178154, now seen corresponding path program 475 times [2021-06-05 21:57:06,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:06,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447869767] [2021-06-05 21:57:06,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:06,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:06,913 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:06,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:06,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447869767] [2021-06-05 21:57:06,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447869767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:06,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418963114] [2021-06-05 21:57:06,913 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:06,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:06,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:57:06,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:07,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:07,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:07,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:57:07,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:07,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:07,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:57:07,131 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:07,149 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 21:57:07,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:07,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 21:57:07,158 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:57:07,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:57:07,165 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:57:07,165 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 21:57:07,185 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:07,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418963114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:07,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:07,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 21:57:07,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557900477] [2021-06-05 21:57:07,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:57:07,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:07,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:57:07,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:57:07,186 INFO L87 Difference]: Start difference. First operand 143 states and 313 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:07,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:07,542 INFO L93 Difference]: Finished difference Result 179 states and 381 transitions. [2021-06-05 21:57:07,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:57:07,543 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:07,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:07,543 INFO L225 Difference]: With dead ends: 179 [2021-06-05 21:57:07,543 INFO L226 Difference]: Without dead ends: 179 [2021-06-05 21:57:07,543 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 416.0ms TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:57:07,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-06-05 21:57:07,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 142. [2021-06-05 21:57:07,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.2056737588652484) internal successors, (311), 141 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:07,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 311 transitions. [2021-06-05 21:57:07,544 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 311 transitions. Word has length 19 [2021-06-05 21:57:07,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:07,544 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 311 transitions. [2021-06-05 21:57:07,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:07,545 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 311 transitions. [2021-06-05 21:57:07,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:07,545 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:07,545 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:07,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 476 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2533 [2021-06-05 21:57:07,745 INFO L430 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:07,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:07,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1823513404, now seen corresponding path program 476 times [2021-06-05 21:57:07,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:07,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877858750] [2021-06-05 21:57:07,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:07,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:07,823 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:07,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:07,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877858750] [2021-06-05 21:57:07,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877858750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:07,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349206180] [2021-06-05 21:57:07,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:07,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:57:07,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:07,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:57:07,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:08,024 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:08,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349206180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:08,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:08,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:57:08,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824398364] [2021-06-05 21:57:08,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:57:08,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:08,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:57:08,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:57:08,025 INFO L87 Difference]: Start difference. First operand 142 states and 311 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:08,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:08,197 INFO L93 Difference]: Finished difference Result 150 states and 321 transitions. [2021-06-05 21:57:08,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:57:08,197 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:08,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:08,198 INFO L225 Difference]: With dead ends: 150 [2021-06-05 21:57:08,198 INFO L226 Difference]: Without dead ends: 142 [2021-06-05 21:57:08,198 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 221.5ms TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:57:08,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-06-05 21:57:08,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-06-05 21:57:08,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.198581560283688) internal successors, (310), 141 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:08,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 310 transitions. [2021-06-05 21:57:08,199 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 310 transitions. Word has length 19 [2021-06-05 21:57:08,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:08,199 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 310 transitions. [2021-06-05 21:57:08,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:08,199 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 310 transitions. [2021-06-05 21:57:08,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:08,199 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:08,199 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:08,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 477 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2535 [2021-06-05 21:57:08,400 INFO L430 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:08,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:08,400 INFO L82 PathProgramCache]: Analyzing trace with hash -2058976434, now seen corresponding path program 477 times [2021-06-05 21:57:08,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:08,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978092928] [2021-06-05 21:57:08,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:08,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:08,476 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:08,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:08,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978092928] [2021-06-05 21:57:08,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978092928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:08,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986816352] [2021-06-05 21:57:08,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:08,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:57:08,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:08,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:57:08,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:08,650 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:08,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986816352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:08,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:08,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:57:08,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496220456] [2021-06-05 21:57:08,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:57:08,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:08,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:57:08,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:57:08,651 INFO L87 Difference]: Start difference. First operand 142 states and 310 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:08,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:08,797 INFO L93 Difference]: Finished difference Result 159 states and 339 transitions. [2021-06-05 21:57:08,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:57:08,797 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:08,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:08,798 INFO L225 Difference]: With dead ends: 159 [2021-06-05 21:57:08,798 INFO L226 Difference]: Without dead ends: 159 [2021-06-05 21:57:08,798 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 173.7ms TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:57:08,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-06-05 21:57:08,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 136. [2021-06-05 21:57:08,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.1703703703703705) internal successors, (293), 135 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:08,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 293 transitions. [2021-06-05 21:57:08,799 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 293 transitions. Word has length 19 [2021-06-05 21:57:08,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:08,799 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 293 transitions. [2021-06-05 21:57:08,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:08,799 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 293 transitions. [2021-06-05 21:57:08,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:08,799 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:08,799 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:09,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2540 [2021-06-05 21:57:09,000 INFO L430 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:09,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:09,000 INFO L82 PathProgramCache]: Analyzing trace with hash -27202426, now seen corresponding path program 478 times [2021-06-05 21:57:09,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:09,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890213286] [2021-06-05 21:57:09,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:09,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:09,073 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:09,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:09,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890213286] [2021-06-05 21:57:09,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890213286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:09,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967258923] [2021-06-05 21:57:09,073 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:09,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:57:09,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:09,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:57:09,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:09,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:09,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:09,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:57:09,203 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:09,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:09,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:57:09,206 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:09,223 INFO L628 ElimStorePlain]: treesize reduction 36, result has 32.1 percent of original size [2021-06-05 21:57:09,223 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:57:09,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:57:09,224 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-06-05 21:57:09,240 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:09,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967258923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:09,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:09,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:57:09,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711811857] [2021-06-05 21:57:09,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:57:09,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:09,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:57:09,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:57:09,241 INFO L87 Difference]: Start difference. First operand 136 states and 293 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:09,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:09,473 INFO L93 Difference]: Finished difference Result 178 states and 377 transitions. [2021-06-05 21:57:09,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:57:09,473 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:09,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:09,473 INFO L225 Difference]: With dead ends: 178 [2021-06-05 21:57:09,473 INFO L226 Difference]: Without dead ends: 178 [2021-06-05 21:57:09,473 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 224.8ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:57:09,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-06-05 21:57:09,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 136. [2021-06-05 21:57:09,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.1703703703703705) internal successors, (293), 135 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:09,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 293 transitions. [2021-06-05 21:57:09,475 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 293 transitions. Word has length 19 [2021-06-05 21:57:09,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:09,475 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 293 transitions. [2021-06-05 21:57:09,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:09,475 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 293 transitions. [2021-06-05 21:57:09,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:09,475 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:09,475 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:09,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 479 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2544 [2021-06-05 21:57:09,675 INFO L430 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:09,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:09,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1374926730, now seen corresponding path program 479 times [2021-06-05 21:57:09,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:09,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457599947] [2021-06-05 21:57:09,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:09,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:09,779 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:09,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:09,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457599947] [2021-06-05 21:57:09,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457599947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:09,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584658225] [2021-06-05 21:57:09,779 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:09,804 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:57:09,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:09,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:57:09,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:09,926 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:09,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584658225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:09,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:09,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:57:09,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669204051] [2021-06-05 21:57:09,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:57:09,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:09,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:57:09,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:57:09,926 INFO L87 Difference]: Start difference. First operand 136 states and 293 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:10,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:10,365 INFO L93 Difference]: Finished difference Result 146 states and 308 transitions. [2021-06-05 21:57:10,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:57:10,365 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:10,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:10,365 INFO L225 Difference]: With dead ends: 146 [2021-06-05 21:57:10,365 INFO L226 Difference]: Without dead ends: 140 [2021-06-05 21:57:10,365 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 421.5ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:57:10,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-06-05 21:57:10,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 135. [2021-06-05 21:57:10,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.1641791044776117) internal successors, (290), 134 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:10,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 290 transitions. [2021-06-05 21:57:10,366 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 290 transitions. Word has length 19 [2021-06-05 21:57:10,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:10,367 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 290 transitions. [2021-06-05 21:57:10,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:10,367 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 290 transitions. [2021-06-05 21:57:10,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:10,367 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:10,367 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:10,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 480 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2545 [2021-06-05 21:57:10,567 INFO L430 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:10,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:10,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1271981482, now seen corresponding path program 480 times [2021-06-05 21:57:10,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:10,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721480203] [2021-06-05 21:57:10,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:10,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:10,643 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:10,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:10,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721480203] [2021-06-05 21:57:10,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721480203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:10,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276521053] [2021-06-05 21:57:10,644 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:10,669 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:57:10,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:10,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:57:10,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:10,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:10,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:10,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:57:10,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:10,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:10,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:57:10,790 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:10,804 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-06-05 21:57:10,804 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:57:10,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:57:10,805 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-06-05 21:57:10,820 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:10,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276521053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:10,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:10,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:57:10,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910703568] [2021-06-05 21:57:10,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:57:10,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:10,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:57:10,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:57:10,821 INFO L87 Difference]: Start difference. First operand 135 states and 290 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:11,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:11,258 INFO L93 Difference]: Finished difference Result 188 states and 396 transitions. [2021-06-05 21:57:11,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:57:11,258 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:11,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:11,258 INFO L225 Difference]: With dead ends: 188 [2021-06-05 21:57:11,258 INFO L226 Difference]: Without dead ends: 188 [2021-06-05 21:57:11,259 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 412.2ms TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:57:11,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-06-05 21:57:11,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 136. [2021-06-05 21:57:11,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.162962962962963) internal successors, (292), 135 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:11,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 292 transitions. [2021-06-05 21:57:11,260 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 292 transitions. Word has length 19 [2021-06-05 21:57:11,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:11,260 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 292 transitions. [2021-06-05 21:57:11,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:11,260 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 292 transitions. [2021-06-05 21:57:11,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:11,260 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:11,260 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:11,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2549,481 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:11,465 INFO L430 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:11,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:11,465 INFO L82 PathProgramCache]: Analyzing trace with hash -2058035502, now seen corresponding path program 481 times [2021-06-05 21:57:11,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:11,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775141657] [2021-06-05 21:57:11,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:11,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:11,555 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:11,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:11,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775141657] [2021-06-05 21:57:11,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775141657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:11,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205890753] [2021-06-05 21:57:11,555 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:11,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:11,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:57:11,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:11,712 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:11,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205890753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:11,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:11,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:57:11,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154138180] [2021-06-05 21:57:11,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:57:11,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:11,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:57:11,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:57:11,713 INFO L87 Difference]: Start difference. First operand 136 states and 292 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:12,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:12,235 INFO L93 Difference]: Finished difference Result 176 states and 363 transitions. [2021-06-05 21:57:12,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:57:12,236 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:12,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:12,236 INFO L225 Difference]: With dead ends: 176 [2021-06-05 21:57:12,236 INFO L226 Difference]: Without dead ends: 173 [2021-06-05 21:57:12,236 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 495.5ms TimeCoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:57:12,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-06-05 21:57:12,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 141. [2021-06-05 21:57:12,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.1714285714285713) internal successors, (304), 140 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:12,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 304 transitions. [2021-06-05 21:57:12,237 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 304 transitions. Word has length 19 [2021-06-05 21:57:12,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:12,238 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 304 transitions. [2021-06-05 21:57:12,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:12,238 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 304 transitions. [2021-06-05 21:57:12,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:12,238 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:12,238 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:12,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 482 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2553 [2021-06-05 21:57:12,438 INFO L430 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:12,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:12,438 INFO L82 PathProgramCache]: Analyzing trace with hash 2013000326, now seen corresponding path program 482 times [2021-06-05 21:57:12,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:12,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33217494] [2021-06-05 21:57:12,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:12,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:12,515 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:12,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:12,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33217494] [2021-06-05 21:57:12,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33217494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:12,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425764579] [2021-06-05 21:57:12,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:12,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:57:12,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:12,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:57:12,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:12,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:12,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:12,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:57:12,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:12,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:12,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:12,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:57:12,641 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:12,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:12,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:12,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:57:12,644 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:12,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:12,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:57:12,647 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:12,687 INFO L628 ElimStorePlain]: treesize reduction 73, result has 38.7 percent of original size [2021-06-05 21:57:12,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:12,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:57:12,691 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:57:12,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:57:12,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:57:12,708 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:141, output treesize:22 [2021-06-05 21:57:12,751 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:12,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425764579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:12,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:12,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:57:12,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531484275] [2021-06-05 21:57:12,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:57:12,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:12,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:57:12,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:57:12,752 INFO L87 Difference]: Start difference. First operand 141 states and 304 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:13,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:13,420 INFO L93 Difference]: Finished difference Result 220 states and 454 transitions. [2021-06-05 21:57:13,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:57:13,420 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:13,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:13,421 INFO L225 Difference]: With dead ends: 220 [2021-06-05 21:57:13,421 INFO L226 Difference]: Without dead ends: 220 [2021-06-05 21:57:13,421 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 650.0ms TimeCoverageRelationStatistics Valid=171, Invalid=1019, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:57:13,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-06-05 21:57:13,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 141. [2021-06-05 21:57:13,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.1714285714285713) internal successors, (304), 140 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:13,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 304 transitions. [2021-06-05 21:57:13,422 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 304 transitions. Word has length 19 [2021-06-05 21:57:13,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:13,422 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 304 transitions. [2021-06-05 21:57:13,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:13,422 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 304 transitions. [2021-06-05 21:57:13,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:13,423 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:13,423 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:13,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2563,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:13,623 INFO L430 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:13,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:13,623 INFO L82 PathProgramCache]: Analyzing trace with hash 602209494, now seen corresponding path program 483 times [2021-06-05 21:57:13,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:13,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348268304] [2021-06-05 21:57:13,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:13,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:13,696 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:13,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:13,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348268304] [2021-06-05 21:57:13,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348268304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:13,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745793598] [2021-06-05 21:57:13,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:13,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:57:13,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:13,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:57:13,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:13,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:13,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:13,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:57:13,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:13,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:13,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:13,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:57:13,839 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:13,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:13,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:13,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:57:13,842 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:13,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:13,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:57:13,845 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:13,877 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 21:57:13,877 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:57:13,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:57:13,878 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 21:57:13,905 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:13,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745793598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:13,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:13,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:57:13,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014799092] [2021-06-05 21:57:13,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:57:13,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:13,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:57:13,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:57:13,906 INFO L87 Difference]: Start difference. First operand 141 states and 304 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:14,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:14,491 INFO L93 Difference]: Finished difference Result 183 states and 385 transitions. [2021-06-05 21:57:14,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:57:14,491 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:14,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:14,491 INFO L225 Difference]: With dead ends: 183 [2021-06-05 21:57:14,491 INFO L226 Difference]: Without dead ends: 181 [2021-06-05 21:57:14,491 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 582.6ms TimeCoverageRelationStatistics Valid=142, Invalid=850, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:57:14,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-06-05 21:57:14,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 141. [2021-06-05 21:57:14,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.164285714285714) internal successors, (303), 140 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:14,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 303 transitions. [2021-06-05 21:57:14,493 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 303 transitions. Word has length 19 [2021-06-05 21:57:14,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:14,493 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 303 transitions. [2021-06-05 21:57:14,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:14,493 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 303 transitions. [2021-06-05 21:57:14,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:14,493 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:14,493 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:14,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 484 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2566 [2021-06-05 21:57:14,694 INFO L430 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:14,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:14,694 INFO L82 PathProgramCache]: Analyzing trace with hash -921850230, now seen corresponding path program 484 times [2021-06-05 21:57:14,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:14,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66464929] [2021-06-05 21:57:14,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:14,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:14,790 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:14,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:14,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66464929] [2021-06-05 21:57:14,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66464929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:14,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262594165] [2021-06-05 21:57:14,790 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:14,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:57:14,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:14,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:57:14,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:14,946 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:14,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262594165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:14,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:14,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:57:14,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118980547] [2021-06-05 21:57:14,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:57:14,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:14,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:57:14,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:57:14,947 INFO L87 Difference]: Start difference. First operand 141 states and 303 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:15,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:15,368 INFO L93 Difference]: Finished difference Result 159 states and 338 transitions. [2021-06-05 21:57:15,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:57:15,369 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:15,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:15,369 INFO L225 Difference]: With dead ends: 159 [2021-06-05 21:57:15,369 INFO L226 Difference]: Without dead ends: 159 [2021-06-05 21:57:15,369 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 388.8ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:57:15,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-06-05 21:57:15,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 134. [2021-06-05 21:57:15,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.1654135338345863) internal successors, (288), 133 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:15,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 288 transitions. [2021-06-05 21:57:15,370 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 288 transitions. Word has length 19 [2021-06-05 21:57:15,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:15,370 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 288 transitions. [2021-06-05 21:57:15,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:15,370 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 288 transitions. [2021-06-05 21:57:15,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:15,370 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:15,371 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:15,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2577,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:15,571 INFO L430 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:15,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:15,571 INFO L82 PathProgramCache]: Analyzing trace with hash 2137187534, now seen corresponding path program 485 times [2021-06-05 21:57:15,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:15,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542723438] [2021-06-05 21:57:15,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:15,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:15,658 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:15,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:15,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542723438] [2021-06-05 21:57:15,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542723438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:15,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683737361] [2021-06-05 21:57:15,659 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:15,685 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:57:15,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:15,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:57:15,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:15,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:15,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:15,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:57:15,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:15,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:15,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:57:15,801 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:15,815 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-06-05 21:57:15,815 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:57:15,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:57:15,815 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-06-05 21:57:15,830 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:15,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683737361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:15,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:15,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:57:15,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028531264] [2021-06-05 21:57:15,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:57:15,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:15,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:57:15,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:57:15,830 INFO L87 Difference]: Start difference. First operand 134 states and 288 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:16,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:16,093 INFO L93 Difference]: Finished difference Result 175 states and 370 transitions. [2021-06-05 21:57:16,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:57:16,094 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:16,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:16,094 INFO L225 Difference]: With dead ends: 175 [2021-06-05 21:57:16,094 INFO L226 Difference]: Without dead ends: 175 [2021-06-05 21:57:16,094 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 263.2ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:57:16,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-06-05 21:57:16,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 135. [2021-06-05 21:57:16,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.1641791044776117) internal successors, (290), 134 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:16,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 290 transitions. [2021-06-05 21:57:16,095 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 290 transitions. Word has length 19 [2021-06-05 21:57:16,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:16,095 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 290 transitions. [2021-06-05 21:57:16,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:16,095 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 290 transitions. [2021-06-05 21:57:16,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:16,095 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:16,095 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:16,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 486 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2587 [2021-06-05 21:57:16,296 INFO L430 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:16,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:16,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1777271016, now seen corresponding path program 486 times [2021-06-05 21:57:16,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:16,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540048674] [2021-06-05 21:57:16,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:16,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:16,376 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:16,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:16,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540048674] [2021-06-05 21:57:16,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540048674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:16,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321475254] [2021-06-05 21:57:16,377 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:16,402 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:57:16,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:16,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:57:16,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:16,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:16,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:16,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:57:16,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:16,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:16,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:16,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:57:16,496 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:16,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:16,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:16,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:57:16,500 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:16,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:16,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:57:16,503 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:16,545 INFO L628 ElimStorePlain]: treesize reduction 71, result has 39.3 percent of original size [2021-06-05 21:57:16,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:16,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:57:16,548 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:57:16,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:57:16,566 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:57:16,566 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:141, output treesize:22 [2021-06-05 21:57:16,607 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:16,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321475254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:16,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:16,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:57:16,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686805077] [2021-06-05 21:57:16,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:57:16,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:16,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:57:16,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:57:16,608 INFO L87 Difference]: Start difference. First operand 135 states and 290 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:17,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:17,028 INFO L93 Difference]: Finished difference Result 197 states and 415 transitions. [2021-06-05 21:57:17,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:57:17,028 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:17,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:17,028 INFO L225 Difference]: With dead ends: 197 [2021-06-05 21:57:17,028 INFO L226 Difference]: Without dead ends: 197 [2021-06-05 21:57:17,028 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 420.1ms TimeCoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:57:17,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-06-05 21:57:17,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 136. [2021-06-05 21:57:17,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.162962962962963) internal successors, (292), 135 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:17,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 292 transitions. [2021-06-05 21:57:17,030 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 292 transitions. Word has length 19 [2021-06-05 21:57:17,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:17,030 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 292 transitions. [2021-06-05 21:57:17,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:17,030 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 292 transitions. [2021-06-05 21:57:17,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:17,030 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:17,030 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:17,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2591,487 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:17,231 INFO L430 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:17,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:17,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1807648510, now seen corresponding path program 487 times [2021-06-05 21:57:17,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:17,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521616874] [2021-06-05 21:57:17,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:17,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:17,317 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:17,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:17,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521616874] [2021-06-05 21:57:17,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521616874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:17,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177597043] [2021-06-05 21:57:17,318 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:17,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:17,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:57:17,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:17,463 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:17,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177597043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:17,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:17,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:57:17,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684956881] [2021-06-05 21:57:17,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:57:17,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:17,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:57:17,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:57:17,464 INFO L87 Difference]: Start difference. First operand 136 states and 292 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:17,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:17,730 INFO L93 Difference]: Finished difference Result 156 states and 332 transitions. [2021-06-05 21:57:17,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:57:17,731 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:17,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:17,731 INFO L225 Difference]: With dead ends: 156 [2021-06-05 21:57:17,731 INFO L226 Difference]: Without dead ends: 156 [2021-06-05 21:57:17,731 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 305.7ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:57:17,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-05 21:57:17,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 134. [2021-06-05 21:57:17,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.1654135338345863) internal successors, (288), 133 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:17,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 288 transitions. [2021-06-05 21:57:17,732 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 288 transitions. Word has length 19 [2021-06-05 21:57:17,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:17,732 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 288 transitions. [2021-06-05 21:57:17,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:17,732 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 288 transitions. [2021-06-05 21:57:17,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:17,733 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:17,733 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:17,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2594,488 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:17,933 INFO L430 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:17,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:17,933 INFO L82 PathProgramCache]: Analyzing trace with hash -979582074, now seen corresponding path program 488 times [2021-06-05 21:57:17,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:17,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953664737] [2021-06-05 21:57:17,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:17,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:18,020 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:18,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:18,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953664737] [2021-06-05 21:57:18,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953664737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:18,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685730120] [2021-06-05 21:57:18,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:18,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:57:18,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:18,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:57:18,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:18,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:18,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:18,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:57:18,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:18,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:18,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:57:18,158 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:18,207 INFO L628 ElimStorePlain]: treesize reduction 78, result has 39.5 percent of original size [2021-06-05 21:57:18,208 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:57:18,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:18,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:57:18,211 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:18,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:57:18,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:18,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:57:18,230 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:57:18,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:57:18,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:57:18,246 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-06-05 21:57:18,289 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:18,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685730120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:18,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:18,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:57:18,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715840562] [2021-06-05 21:57:18,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:57:18,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:18,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:57:18,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:57:18,290 INFO L87 Difference]: Start difference. First operand 134 states and 288 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:18,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:18,531 INFO L93 Difference]: Finished difference Result 181 states and 373 transitions. [2021-06-05 21:57:18,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:57:18,531 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:18,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:18,531 INFO L225 Difference]: With dead ends: 181 [2021-06-05 21:57:18,531 INFO L226 Difference]: Without dead ends: 181 [2021-06-05 21:57:18,531 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 285.5ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:57:18,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-06-05 21:57:18,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 134. [2021-06-05 21:57:18,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.1654135338345863) internal successors, (288), 133 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:18,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 288 transitions. [2021-06-05 21:57:18,533 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 288 transitions. Word has length 19 [2021-06-05 21:57:18,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:18,533 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 288 transitions. [2021-06-05 21:57:18,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:18,533 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 288 transitions. [2021-06-05 21:57:18,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:18,533 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:18,533 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:18,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2604,489 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:18,737 INFO L430 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:18,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:18,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1030603636, now seen corresponding path program 489 times [2021-06-05 21:57:18,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:18,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990053013] [2021-06-05 21:57:18,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:18,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:18,816 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:18,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:18,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990053013] [2021-06-05 21:57:18,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990053013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:18,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392950789] [2021-06-05 21:57:18,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:18,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:57:18,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:18,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:57:18,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:18,994 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:18,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392950789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:18,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:18,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:57:18,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443922270] [2021-06-05 21:57:18,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:57:18,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:18,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:57:18,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:57:18,994 INFO L87 Difference]: Start difference. First operand 134 states and 288 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:19,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:19,309 INFO L93 Difference]: Finished difference Result 220 states and 451 transitions. [2021-06-05 21:57:19,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:57:19,309 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:19,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:19,309 INFO L225 Difference]: With dead ends: 220 [2021-06-05 21:57:19,310 INFO L226 Difference]: Without dead ends: 220 [2021-06-05 21:57:19,310 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 299.9ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:57:19,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-06-05 21:57:19,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 135. [2021-06-05 21:57:19,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.1865671641791047) internal successors, (293), 134 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:19,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 293 transitions. [2021-06-05 21:57:19,311 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 293 transitions. Word has length 19 [2021-06-05 21:57:19,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:19,311 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 293 transitions. [2021-06-05 21:57:19,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:19,311 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 293 transitions. [2021-06-05 21:57:19,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:19,311 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:19,311 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:19,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2608 [2021-06-05 21:57:19,512 INFO L430 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:19,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:19,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1852517328, now seen corresponding path program 490 times [2021-06-05 21:57:19,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:19,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231877883] [2021-06-05 21:57:19,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:19,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:19,596 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:19,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:19,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231877883] [2021-06-05 21:57:19,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231877883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:19,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429553014] [2021-06-05 21:57:19,597 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:19,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:57:19,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:19,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:57:19,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:19,751 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:19,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429553014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:19,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:19,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:57:19,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041818738] [2021-06-05 21:57:19,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:57:19,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:19,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:57:19,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:57:19,752 INFO L87 Difference]: Start difference. First operand 135 states and 293 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:20,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:20,051 INFO L93 Difference]: Finished difference Result 144 states and 307 transitions. [2021-06-05 21:57:20,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:57:20,051 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:20,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:20,051 INFO L225 Difference]: With dead ends: 144 [2021-06-05 21:57:20,051 INFO L226 Difference]: Without dead ends: 140 [2021-06-05 21:57:20,051 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 321.4ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:57:20,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-06-05 21:57:20,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 135. [2021-06-05 21:57:20,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.1791044776119404) internal successors, (292), 134 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:20,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 292 transitions. [2021-06-05 21:57:20,053 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 292 transitions. Word has length 19 [2021-06-05 21:57:20,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:20,053 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 292 transitions. [2021-06-05 21:57:20,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:20,053 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 292 transitions. [2021-06-05 21:57:20,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:20,053 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:20,053 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:20,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2618,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:20,253 INFO L430 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:20,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:20,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1765636094, now seen corresponding path program 491 times [2021-06-05 21:57:20,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:20,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169229085] [2021-06-05 21:57:20,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:20,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:20,332 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:20,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:20,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169229085] [2021-06-05 21:57:20,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169229085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:20,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40301612] [2021-06-05 21:57:20,332 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:20,359 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:57:20,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:20,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:57:20,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:20,496 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:20,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40301612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:20,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:20,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:57:20,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489773323] [2021-06-05 21:57:20,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:57:20,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:20,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:57:20,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:57:20,497 INFO L87 Difference]: Start difference. First operand 135 states and 292 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:20,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:20,683 INFO L93 Difference]: Finished difference Result 172 states and 363 transitions. [2021-06-05 21:57:20,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:57:20,684 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:20,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:20,684 INFO L225 Difference]: With dead ends: 172 [2021-06-05 21:57:20,684 INFO L226 Difference]: Without dead ends: 172 [2021-06-05 21:57:20,684 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 207.3ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:57:20,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-05 21:57:20,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 130. [2021-06-05 21:57:20,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.1627906976744184) internal successors, (279), 129 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:20,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 279 transitions. [2021-06-05 21:57:20,685 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 279 transitions. Word has length 19 [2021-06-05 21:57:20,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:20,686 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 279 transitions. [2021-06-05 21:57:20,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:20,686 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 279 transitions. [2021-06-05 21:57:20,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:20,686 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:20,686 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:20,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 492 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2624 [2021-06-05 21:57:20,886 INFO L430 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:20,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:20,886 INFO L82 PathProgramCache]: Analyzing trace with hash 447244630, now seen corresponding path program 492 times [2021-06-05 21:57:20,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:20,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246504911] [2021-06-05 21:57:20,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:20,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:20,961 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:20,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:20,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246504911] [2021-06-05 21:57:20,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246504911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:20,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228205444] [2021-06-05 21:57:20,962 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:20,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:57:20,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:20,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:57:20,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:21,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:21,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:21,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:57:21,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:21,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:21,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:57:21,098 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:21,112 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-06-05 21:57:21,113 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:57:21,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:57:21,113 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-06-05 21:57:21,117 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:21,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228205444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:21,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:21,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:57:21,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451187815] [2021-06-05 21:57:21,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:57:21,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:21,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:57:21,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:57:21,118 INFO L87 Difference]: Start difference. First operand 130 states and 279 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:21,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:21,315 INFO L93 Difference]: Finished difference Result 171 states and 361 transitions. [2021-06-05 21:57:21,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:57:21,316 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:21,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:21,316 INFO L225 Difference]: With dead ends: 171 [2021-06-05 21:57:21,316 INFO L226 Difference]: Without dead ends: 171 [2021-06-05 21:57:21,316 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 228.6ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:57:21,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-06-05 21:57:21,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 132. [2021-06-05 21:57:21,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.1603053435114505) internal successors, (283), 131 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:21,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 283 transitions. [2021-06-05 21:57:21,317 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 283 transitions. Word has length 19 [2021-06-05 21:57:21,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:21,317 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 283 transitions. [2021-06-05 21:57:21,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:21,318 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 283 transitions. [2021-06-05 21:57:21,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:21,318 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:21,318 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:21,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2628,493 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:21,523 INFO L430 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:21,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:21,524 INFO L82 PathProgramCache]: Analyzing trace with hash 87328112, now seen corresponding path program 493 times [2021-06-05 21:57:21,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:21,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359726159] [2021-06-05 21:57:21,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:21,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:21,604 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:21,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:21,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359726159] [2021-06-05 21:57:21,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359726159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:21,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537573706] [2021-06-05 21:57:21,604 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:21,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:21,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:57:21,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:21,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:21,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:21,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:57:21,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:21,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:21,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:21,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:57:21,740 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:21,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:21,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:21,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:57:21,744 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:21,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:21,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:57:21,747 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:21,779 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 21:57:21,780 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:57:21,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:57:21,780 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 21:57:21,816 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:21,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537573706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:21,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:21,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:57:21,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907386509] [2021-06-05 21:57:21,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:57:21,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:21,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:57:21,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:57:21,817 INFO L87 Difference]: Start difference. First operand 132 states and 283 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:22,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:22,129 INFO L93 Difference]: Finished difference Result 187 states and 394 transitions. [2021-06-05 21:57:22,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:57:22,129 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:22,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:22,130 INFO L225 Difference]: With dead ends: 187 [2021-06-05 21:57:22,130 INFO L226 Difference]: Without dead ends: 187 [2021-06-05 21:57:22,130 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 283.6ms TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:57:22,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-06-05 21:57:22,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 133. [2021-06-05 21:57:22,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.159090909090909) internal successors, (285), 132 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:22,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 285 transitions. [2021-06-05 21:57:22,131 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 285 transitions. Word has length 19 [2021-06-05 21:57:22,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:22,131 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 285 transitions. [2021-06-05 21:57:22,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:22,131 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 285 transitions. [2021-06-05 21:57:22,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:22,131 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:22,131 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:22,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 494 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2632 [2021-06-05 21:57:22,332 INFO L430 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:22,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:22,332 INFO L82 PathProgramCache]: Analyzing trace with hash 797375882, now seen corresponding path program 494 times [2021-06-05 21:57:22,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:22,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224864948] [2021-06-05 21:57:22,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:22,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:22,418 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:22,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:22,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224864948] [2021-06-05 21:57:22,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224864948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:22,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076829227] [2021-06-05 21:57:22,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:22,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:57:22,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:22,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:57:22,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:22,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:22,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:22,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:57:22,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:22,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:22,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:22,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:57:22,729 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:22,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:22,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:22,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:57:22,732 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:22,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:22,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:57:22,735 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:22,775 INFO L628 ElimStorePlain]: treesize reduction 59, result has 43.8 percent of original size [2021-06-05 21:57:22,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:22,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:22,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:57:22,779 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:57:22,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:22,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 21:57:22,783 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:57:22,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:57:22,800 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:57:22,800 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:133, output treesize:22 [2021-06-05 21:57:22,840 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:22,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076829227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:22,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:22,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:57:22,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470518100] [2021-06-05 21:57:22,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:57:22,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:22,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:57:22,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:57:22,841 INFO L87 Difference]: Start difference. First operand 133 states and 285 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:23,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:23,011 INFO L93 Difference]: Finished difference Result 154 states and 327 transitions. [2021-06-05 21:57:23,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:57:23,012 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:23,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:23,012 INFO L225 Difference]: With dead ends: 154 [2021-06-05 21:57:23,012 INFO L226 Difference]: Without dead ends: 154 [2021-06-05 21:57:23,012 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 232.2ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:57:23,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-05 21:57:23,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 131. [2021-06-05 21:57:23,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.1615384615384614) internal successors, (281), 130 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:23,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 281 transitions. [2021-06-05 21:57:23,013 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 281 transitions. Word has length 19 [2021-06-05 21:57:23,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:23,013 INFO L482 AbstractCegarLoop]: Abstraction has 131 states and 281 transitions. [2021-06-05 21:57:23,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:23,013 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 281 transitions. [2021-06-05 21:57:23,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:23,014 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:23,014 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:23,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 495 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2642 [2021-06-05 21:57:23,214 INFO L430 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:23,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:23,214 INFO L82 PathProgramCache]: Analyzing trace with hash -2019456008, now seen corresponding path program 495 times [2021-06-05 21:57:23,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:23,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8871612] [2021-06-05 21:57:23,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:23,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:23,296 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:23,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:23,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8871612] [2021-06-05 21:57:23,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8871612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:23,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192940515] [2021-06-05 21:57:23,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:23,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:57:23,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:23,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:57:23,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:23,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:23,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:23,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:57:23,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:23,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:23,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:57:23,436 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:23,473 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-06-05 21:57:23,473 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:57:23,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 21:57:23,476 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:23,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:57:23,489 INFO L518 ElimStorePlain]: Eliminatee v_prenex_396 vanished before elimination [2021-06-05 21:57:23,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:57:23,489 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 21:57:23,515 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:23,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192940515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:23,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:23,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:57:23,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767922033] [2021-06-05 21:57:23,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:57:23,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:23,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:57:23,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:57:23,515 INFO L87 Difference]: Start difference. First operand 131 states and 281 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:23,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:23,848 INFO L93 Difference]: Finished difference Result 172 states and 357 transitions. [2021-06-05 21:57:23,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:57:23,849 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:23,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:23,849 INFO L225 Difference]: With dead ends: 172 [2021-06-05 21:57:23,849 INFO L226 Difference]: Without dead ends: 172 [2021-06-05 21:57:23,849 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 331.3ms TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:57:23,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-05 21:57:23,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 133. [2021-06-05 21:57:23,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.1666666666666665) internal successors, (286), 132 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:23,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 286 transitions. [2021-06-05 21:57:23,850 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 286 transitions. Word has length 19 [2021-06-05 21:57:23,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:23,851 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 286 transitions. [2021-06-05 21:57:23,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:23,851 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 286 transitions. [2021-06-05 21:57:23,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:23,851 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:23,851 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:24,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2646,496 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:24,051 INFO L430 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:24,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:24,052 INFO L82 PathProgramCache]: Analyzing trace with hash -659339268, now seen corresponding path program 496 times [2021-06-05 21:57:24,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:24,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877970106] [2021-06-05 21:57:24,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:24,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:24,142 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:24,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:24,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877970106] [2021-06-05 21:57:24,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877970106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:24,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751314325] [2021-06-05 21:57:24,143 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:24,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:57:24,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:24,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:57:24,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:24,316 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:24,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751314325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:24,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:24,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:57:24,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078490248] [2021-06-05 21:57:24,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:57:24,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:24,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:57:24,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:57:24,317 INFO L87 Difference]: Start difference. First operand 133 states and 286 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:24,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:24,725 INFO L93 Difference]: Finished difference Result 212 states and 433 transitions. [2021-06-05 21:57:24,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:57:24,725 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:24,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:24,726 INFO L225 Difference]: With dead ends: 212 [2021-06-05 21:57:24,726 INFO L226 Difference]: Without dead ends: 212 [2021-06-05 21:57:24,726 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 390.2ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:57:24,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-06-05 21:57:24,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 134. [2021-06-05 21:57:24,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.18796992481203) internal successors, (291), 133 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:24,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 291 transitions. [2021-06-05 21:57:24,727 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 291 transitions. Word has length 19 [2021-06-05 21:57:24,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:24,727 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 291 transitions. [2021-06-05 21:57:24,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:24,727 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 291 transitions. [2021-06-05 21:57:24,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:24,728 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:24,728 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:24,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 497 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2653 [2021-06-05 21:57:24,928 INFO L430 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:24,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:24,928 INFO L82 PathProgramCache]: Analyzing trace with hash 752507064, now seen corresponding path program 497 times [2021-06-05 21:57:24,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:24,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503687481] [2021-06-05 21:57:24,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:24,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:25,014 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:25,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:25,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503687481] [2021-06-05 21:57:25,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503687481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:25,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736848521] [2021-06-05 21:57:25,015 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:25,040 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:57:25,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:25,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:57:25,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:25,162 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:25,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736848521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:25,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:25,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:57:25,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084450085] [2021-06-05 21:57:25,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:57:25,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:25,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:57:25,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:57:25,163 INFO L87 Difference]: Start difference. First operand 134 states and 291 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:25,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:25,421 INFO L93 Difference]: Finished difference Result 140 states and 299 transitions. [2021-06-05 21:57:25,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:57:25,421 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:25,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:25,421 INFO L225 Difference]: With dead ends: 140 [2021-06-05 21:57:25,421 INFO L226 Difference]: Without dead ends: 136 [2021-06-05 21:57:25,421 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 265.6ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:57:25,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-06-05 21:57:25,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2021-06-05 21:57:25,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.180451127819549) internal successors, (290), 133 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:25,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 290 transitions. [2021-06-05 21:57:25,422 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 290 transitions. Word has length 19 [2021-06-05 21:57:25,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:25,422 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 290 transitions. [2021-06-05 21:57:25,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:25,422 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 290 transitions. [2021-06-05 21:57:25,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:25,423 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:25,423 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:25,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 498 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2665 [2021-06-05 21:57:25,623 INFO L430 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:25,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:25,623 INFO L82 PathProgramCache]: Analyzing trace with hash 839388298, now seen corresponding path program 498 times [2021-06-05 21:57:25,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:25,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135046011] [2021-06-05 21:57:25,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:25,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:25,702 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:25,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:25,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135046011] [2021-06-05 21:57:25,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135046011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:25,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087724248] [2021-06-05 21:57:25,702 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:25,727 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:57:25,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:25,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:57:25,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:25,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:25,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:25,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:57:25,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:25,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:25,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:57:25,837 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:25,855 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 21:57:25,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:25,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 21:57:25,858 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:57:25,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:57:25,864 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:57:25,864 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 21:57:25,881 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:25,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087724248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:25,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:25,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:57:25,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632739817] [2021-06-05 21:57:25,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:57:25,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:25,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:57:25,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:57:25,882 INFO L87 Difference]: Start difference. First operand 134 states and 290 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:26,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:26,081 INFO L93 Difference]: Finished difference Result 166 states and 351 transitions. [2021-06-05 21:57:26,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:57:26,081 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:26,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:26,081 INFO L225 Difference]: With dead ends: 166 [2021-06-05 21:57:26,081 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 21:57:26,082 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 208.7ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:57:26,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 21:57:26,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 130. [2021-06-05 21:57:26,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.1627906976744184) internal successors, (279), 129 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:26,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 279 transitions. [2021-06-05 21:57:26,083 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 279 transitions. Word has length 19 [2021-06-05 21:57:26,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:26,083 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 279 transitions. [2021-06-05 21:57:26,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:26,083 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 279 transitions. [2021-06-05 21:57:26,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:26,083 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:26,083 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:26,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 499 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2669 [2021-06-05 21:57:26,284 INFO L430 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:26,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:26,284 INFO L82 PathProgramCache]: Analyzing trace with hash 739644038, now seen corresponding path program 499 times [2021-06-05 21:57:26,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:26,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331650205] [2021-06-05 21:57:26,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:26,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:26,382 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:26,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:26,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331650205] [2021-06-05 21:57:26,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331650205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:26,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036336451] [2021-06-05 21:57:26,382 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:26,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:26,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:57:26,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:26,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:26,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:26,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:57:26,545 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:26,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:26,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:57:26,548 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:26,586 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-06-05 21:57:26,586 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:57:26,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 21:57:26,589 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:26,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:57:26,601 INFO L518 ElimStorePlain]: Eliminatee v_prenex_400 vanished before elimination [2021-06-05 21:57:26,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:57:26,602 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 21:57:26,644 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:26,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036336451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:26,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:26,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:57:26,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646254843] [2021-06-05 21:57:26,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:57:26,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:26,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:57:26,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:57:26,645 INFO L87 Difference]: Start difference. First operand 130 states and 279 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:27,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:27,115 INFO L93 Difference]: Finished difference Result 172 states and 353 transitions. [2021-06-05 21:57:27,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:57:27,116 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:27,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:27,116 INFO L225 Difference]: With dead ends: 172 [2021-06-05 21:57:27,116 INFO L226 Difference]: Without dead ends: 172 [2021-06-05 21:57:27,116 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 462.7ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:57:27,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-05 21:57:27,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 129. [2021-06-05 21:57:27,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.1640625) internal successors, (277), 128 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:27,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 277 transitions. [2021-06-05 21:57:27,117 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 277 transitions. Word has length 19 [2021-06-05 21:57:27,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:27,117 INFO L482 AbstractCegarLoop]: Abstraction has 129 states and 277 transitions. [2021-06-05 21:57:27,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:27,118 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 277 transitions. [2021-06-05 21:57:27,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:27,118 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:27,118 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:27,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2671,500 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:27,318 INFO L430 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:27,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:27,318 INFO L82 PathProgramCache]: Analyzing trace with hash -133291216, now seen corresponding path program 500 times [2021-06-05 21:57:27,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:27,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601101921] [2021-06-05 21:57:27,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:27,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:27,411 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:27,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:27,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601101921] [2021-06-05 21:57:27,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601101921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:27,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734706284] [2021-06-05 21:57:27,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:27,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:57:27,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:27,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:57:27,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:27,587 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:27,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734706284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:27,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:27,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:57:27,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684982520] [2021-06-05 21:57:27,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:57:27,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:27,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:57:27,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:57:27,588 INFO L87 Difference]: Start difference. First operand 129 states and 277 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:28,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:28,040 INFO L93 Difference]: Finished difference Result 140 states and 293 transitions. [2021-06-05 21:57:28,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:57:28,040 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:28,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:28,041 INFO L225 Difference]: With dead ends: 140 [2021-06-05 21:57:28,041 INFO L226 Difference]: Without dead ends: 136 [2021-06-05 21:57:28,041 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 431.0ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:57:28,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-06-05 21:57:28,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 129. [2021-06-05 21:57:28,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.15625) internal successors, (276), 128 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:28,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 276 transitions. [2021-06-05 21:57:28,042 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 276 transitions. Word has length 19 [2021-06-05 21:57:28,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:28,042 INFO L482 AbstractCegarLoop]: Abstraction has 129 states and 276 transitions. [2021-06-05 21:57:28,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:28,042 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 276 transitions. [2021-06-05 21:57:28,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:28,042 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:28,042 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:28,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2678,501 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:28,243 INFO L430 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:28,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:28,243 INFO L82 PathProgramCache]: Analyzing trace with hash -46409982, now seen corresponding path program 501 times [2021-06-05 21:57:28,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:28,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374524375] [2021-06-05 21:57:28,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:28,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:28,319 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:28,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:28,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374524375] [2021-06-05 21:57:28,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374524375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:28,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142373192] [2021-06-05 21:57:28,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:28,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:57:28,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:28,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:57:28,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:28,482 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:28,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142373192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:28,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:28,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:57:28,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803531320] [2021-06-05 21:57:28,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:57:28,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:28,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:57:28,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:57:28,482 INFO L87 Difference]: Start difference. First operand 129 states and 276 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:28,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:28,890 INFO L93 Difference]: Finished difference Result 201 states and 419 transitions. [2021-06-05 21:57:28,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:57:28,891 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:28,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:28,891 INFO L225 Difference]: With dead ends: 201 [2021-06-05 21:57:28,891 INFO L226 Difference]: Without dead ends: 201 [2021-06-05 21:57:28,891 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 361.1ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:57:28,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-06-05 21:57:28,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 130. [2021-06-05 21:57:28,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.1705426356589146) internal successors, (280), 129 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:28,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 280 transitions. [2021-06-05 21:57:28,892 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 280 transitions. Word has length 19 [2021-06-05 21:57:28,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:28,892 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 280 transitions. [2021-06-05 21:57:28,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:28,893 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 280 transitions. [2021-06-05 21:57:28,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:28,893 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:28,893 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:29,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2683 [2021-06-05 21:57:29,093 INFO L430 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:29,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:29,093 INFO L82 PathProgramCache]: Analyzing trace with hash -639637482, now seen corresponding path program 502 times [2021-06-05 21:57:29,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:29,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938916109] [2021-06-05 21:57:29,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:29,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:29,168 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:29,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:29,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938916109] [2021-06-05 21:57:29,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938916109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:29,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958576839] [2021-06-05 21:57:29,169 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:29,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:57:29,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:29,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:57:29,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:29,327 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:29,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958576839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:29,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:29,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:57:29,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803125005] [2021-06-05 21:57:29,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:57:29,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:29,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:57:29,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:57:29,328 INFO L87 Difference]: Start difference. First operand 130 states and 280 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:29,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:29,592 INFO L93 Difference]: Finished difference Result 137 states and 289 transitions. [2021-06-05 21:57:29,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:57:29,592 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:29,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:29,592 INFO L225 Difference]: With dead ends: 137 [2021-06-05 21:57:29,592 INFO L226 Difference]: Without dead ends: 131 [2021-06-05 21:57:29,592 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 286.5ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:57:29,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-06-05 21:57:29,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2021-06-05 21:57:29,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.1627906976744184) internal successors, (279), 129 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:29,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 279 transitions. [2021-06-05 21:57:29,593 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 279 transitions. Word has length 19 [2021-06-05 21:57:29,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:29,593 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 279 transitions. [2021-06-05 21:57:29,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:29,594 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 279 transitions. [2021-06-05 21:57:29,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:29,594 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:29,594 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:29,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 503 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2687 [2021-06-05 21:57:29,794 INFO L430 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:29,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:29,794 INFO L82 PathProgramCache]: Analyzing trace with hash 2141773194, now seen corresponding path program 503 times [2021-06-05 21:57:29,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:29,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580254605] [2021-06-05 21:57:29,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:29,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:29,876 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:29,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:29,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580254605] [2021-06-05 21:57:29,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580254605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:29,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366076986] [2021-06-05 21:57:29,876 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:29,901 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:57:29,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:29,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:57:29,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:30,038 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:30,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366076986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:30,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:30,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:57:30,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871125257] [2021-06-05 21:57:30,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:57:30,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:30,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:57:30,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:57:30,039 INFO L87 Difference]: Start difference. First operand 130 states and 279 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:30,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:30,269 INFO L93 Difference]: Finished difference Result 168 states and 356 transitions. [2021-06-05 21:57:30,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:57:30,270 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:30,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:30,270 INFO L225 Difference]: With dead ends: 168 [2021-06-05 21:57:30,270 INFO L226 Difference]: Without dead ends: 168 [2021-06-05 21:57:30,270 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 178.6ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:57:30,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-06-05 21:57:30,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2021-06-05 21:57:30,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.153225806451613) internal successors, (267), 124 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:30,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 267 transitions. [2021-06-05 21:57:30,271 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 267 transitions. Word has length 19 [2021-06-05 21:57:30,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:30,271 INFO L482 AbstractCegarLoop]: Abstraction has 125 states and 267 transitions. [2021-06-05 21:57:30,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:30,271 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 267 transitions. [2021-06-05 21:57:30,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:30,272 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:30,272 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:30,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2692,504 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:30,472 INFO L430 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:30,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:30,472 INFO L82 PathProgramCache]: Analyzing trace with hash -401377842, now seen corresponding path program 504 times [2021-06-05 21:57:30,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:30,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445081371] [2021-06-05 21:57:30,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:30,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:30,560 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:30,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:30,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445081371] [2021-06-05 21:57:30,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445081371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:30,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044786026] [2021-06-05 21:57:30,561 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:30,586 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:57:30,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:30,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:57:30,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:30,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:30,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:30,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:57:30,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:30,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:30,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:57:30,700 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:30,716 INFO L628 ElimStorePlain]: treesize reduction 38, result has 30.9 percent of original size [2021-06-05 21:57:30,716 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:57:30,717 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:57:30,717 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-06-05 21:57:30,733 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:30,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044786026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:30,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:30,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:57:30,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607321960] [2021-06-05 21:57:30,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:57:30,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:30,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:57:30,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:57:30,734 INFO L87 Difference]: Start difference. First operand 125 states and 267 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:31,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:31,011 INFO L93 Difference]: Finished difference Result 167 states and 351 transitions. [2021-06-05 21:57:31,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:57:31,011 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:31,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:31,012 INFO L225 Difference]: With dead ends: 167 [2021-06-05 21:57:31,012 INFO L226 Difference]: Without dead ends: 167 [2021-06-05 21:57:31,012 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 268.5ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:57:31,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-05 21:57:31,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 126. [2021-06-05 21:57:31,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.152) internal successors, (269), 125 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:31,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 269 transitions. [2021-06-05 21:57:31,013 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 269 transitions. Word has length 19 [2021-06-05 21:57:31,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:31,013 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 269 transitions. [2021-06-05 21:57:31,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:31,013 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 269 transitions. [2021-06-05 21:57:31,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:31,013 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:31,013 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:31,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 505 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2696 [2021-06-05 21:57:31,229 INFO L430 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:31,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:31,229 INFO L82 PathProgramCache]: Analyzing trace with hash -761294360, now seen corresponding path program 505 times [2021-06-05 21:57:31,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:31,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100902749] [2021-06-05 21:57:31,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:31,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:31,310 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:31,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:31,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100902749] [2021-06-05 21:57:31,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100902749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:31,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301080050] [2021-06-05 21:57:31,310 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:31,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:31,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:57:31,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:31,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:31,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:31,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:57:31,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:31,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:31,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:31,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:57:31,444 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:31,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:31,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:31,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:57:31,447 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:31,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:31,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:57:31,450 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:31,482 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 21:57:31,482 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:57:31,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:57:31,483 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 21:57:31,521 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:31,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301080050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:31,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:31,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:57:31,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225449047] [2021-06-05 21:57:31,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:57:31,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:31,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:57:31,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:57:31,522 INFO L87 Difference]: Start difference. First operand 126 states and 269 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:31,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:31,800 INFO L93 Difference]: Finished difference Result 183 states and 384 transitions. [2021-06-05 21:57:31,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:57:31,801 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:31,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:31,801 INFO L225 Difference]: With dead ends: 183 [2021-06-05 21:57:31,801 INFO L226 Difference]: Without dead ends: 183 [2021-06-05 21:57:31,801 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 286.3ms TimeCoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:57:31,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-05 21:57:31,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 127. [2021-06-05 21:57:31,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.1507936507936507) internal successors, (271), 126 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:31,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 271 transitions. [2021-06-05 21:57:31,803 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 271 transitions. Word has length 19 [2021-06-05 21:57:31,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:31,803 INFO L482 AbstractCegarLoop]: Abstraction has 127 states and 271 transitions. [2021-06-05 21:57:31,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:31,803 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 271 transitions. [2021-06-05 21:57:31,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:31,803 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:31,803 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:32,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 506 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2697 [2021-06-05 21:57:32,003 INFO L430 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:32,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:32,004 INFO L82 PathProgramCache]: Analyzing trace with hash -51246590, now seen corresponding path program 506 times [2021-06-05 21:57:32,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:32,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909952481] [2021-06-05 21:57:32,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:32,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:32,093 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:32,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:32,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909952481] [2021-06-05 21:57:32,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909952481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:32,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431827258] [2021-06-05 21:57:32,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:32,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:57:32,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:32,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:57:32,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:32,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:32,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:32,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:57:32,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:32,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:32,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:32,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:57:32,217 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:32,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:32,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:32,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:57:32,220 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:32,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:32,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:57:32,223 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:32,263 INFO L628 ElimStorePlain]: treesize reduction 65, result has 38.1 percent of original size [2021-06-05 21:57:32,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:32,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 21:57:32,267 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:57:32,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:57:32,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:57:32,285 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:133, output treesize:22 [2021-06-05 21:57:32,327 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:32,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431827258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:32,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:32,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:57:32,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103139875] [2021-06-05 21:57:32,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:57:32,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:32,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:57:32,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:57:32,328 INFO L87 Difference]: Start difference. First operand 127 states and 271 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:32,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:32,588 INFO L93 Difference]: Finished difference Result 150 states and 317 transitions. [2021-06-05 21:57:32,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:57:32,589 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:32,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:32,589 INFO L225 Difference]: With dead ends: 150 [2021-06-05 21:57:32,589 INFO L226 Difference]: Without dead ends: 150 [2021-06-05 21:57:32,589 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 250.1ms TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:57:32,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-06-05 21:57:32,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 125. [2021-06-05 21:57:32,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.153225806451613) internal successors, (267), 124 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:32,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 267 transitions. [2021-06-05 21:57:32,590 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 267 transitions. Word has length 19 [2021-06-05 21:57:32,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:32,590 INFO L482 AbstractCegarLoop]: Abstraction has 125 states and 267 transitions. [2021-06-05 21:57:32,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:32,590 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 267 transitions. [2021-06-05 21:57:32,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:32,591 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:32,591 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:32,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2707,507 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:32,801 INFO L430 AbstractCegarLoop]: === Iteration 513 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:32,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:32,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1426888816, now seen corresponding path program 507 times [2021-06-05 21:57:32,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:32,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724399223] [2021-06-05 21:57:32,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:32,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:32,902 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:32,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:32,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724399223] [2021-06-05 21:57:32,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724399223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:32,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974384472] [2021-06-05 21:57:32,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:32,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:57:32,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:32,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:57:32,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:33,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:33,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:33,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:57:33,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:33,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:33,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:57:33,047 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:33,086 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-06-05 21:57:33,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 21:57:33,089 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:33,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:57:33,102 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:57:33,102 INFO L518 ElimStorePlain]: Eliminatee v_prenex_403 vanished before elimination [2021-06-05 21:57:33,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:57:33,103 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 21:57:33,129 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:33,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974384472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:33,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:33,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:57:33,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400557343] [2021-06-05 21:57:33,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:57:33,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:33,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:57:33,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:57:33,130 INFO L87 Difference]: Start difference. First operand 125 states and 267 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:33,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:33,488 INFO L93 Difference]: Finished difference Result 168 states and 346 transitions. [2021-06-05 21:57:33,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:57:33,488 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:33,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:33,488 INFO L225 Difference]: With dead ends: 168 [2021-06-05 21:57:33,489 INFO L226 Difference]: Without dead ends: 168 [2021-06-05 21:57:33,489 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 365.3ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:57:33,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-06-05 21:57:33,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2021-06-05 21:57:33,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.153225806451613) internal successors, (267), 124 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:33,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 267 transitions. [2021-06-05 21:57:33,490 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 267 transitions. Word has length 19 [2021-06-05 21:57:33,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:33,490 INFO L482 AbstractCegarLoop]: Abstraction has 125 states and 267 transitions. [2021-06-05 21:57:33,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:33,490 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 267 transitions. [2021-06-05 21:57:33,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:33,490 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:33,490 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:33,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2711,508 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:33,691 INFO L430 AbstractCegarLoop]: === Iteration 514 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:33,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:33,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1507961740, now seen corresponding path program 508 times [2021-06-05 21:57:33,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:33,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061174053] [2021-06-05 21:57:33,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:33,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:33,772 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:33,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:33,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061174053] [2021-06-05 21:57:33,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061174053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:33,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169333992] [2021-06-05 21:57:33,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:33,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:57:33,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:33,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:57:33,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:33,942 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:33,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169333992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:33,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:33,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:57:33,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155929061] [2021-06-05 21:57:33,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:57:33,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:33,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:57:33,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:57:33,943 INFO L87 Difference]: Start difference. First operand 125 states and 267 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:34,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:34,357 INFO L93 Difference]: Finished difference Result 210 states and 427 transitions. [2021-06-05 21:57:34,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:57:34,357 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:34,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:34,357 INFO L225 Difference]: With dead ends: 210 [2021-06-05 21:57:34,357 INFO L226 Difference]: Without dead ends: 210 [2021-06-05 21:57:34,358 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 396.7ms TimeCoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:57:34,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-06-05 21:57:34,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 126. [2021-06-05 21:57:34,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.176) internal successors, (272), 125 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:34,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 272 transitions. [2021-06-05 21:57:34,359 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 272 transitions. Word has length 19 [2021-06-05 21:57:34,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:34,359 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 272 transitions. [2021-06-05 21:57:34,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:34,359 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 272 transitions. [2021-06-05 21:57:34,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:34,359 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:34,359 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:34,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2718,509 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:34,560 INFO L430 AbstractCegarLoop]: === Iteration 515 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:34,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:34,560 INFO L82 PathProgramCache]: Analyzing trace with hash -96115408, now seen corresponding path program 509 times [2021-06-05 21:57:34,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:34,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298641837] [2021-06-05 21:57:34,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:34,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:34,646 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:34,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:34,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298641837] [2021-06-05 21:57:34,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298641837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:34,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217945135] [2021-06-05 21:57:34,646 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:34,673 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:57:34,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:34,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:57:34,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:34,805 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:34,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217945135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:34,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:34,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:57:34,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946250390] [2021-06-05 21:57:34,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:57:34,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:34,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:57:34,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:57:34,806 INFO L87 Difference]: Start difference. First operand 126 states and 272 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:35,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:35,141 INFO L93 Difference]: Finished difference Result 134 states and 284 transitions. [2021-06-05 21:57:35,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:57:35,142 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:35,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:35,142 INFO L225 Difference]: With dead ends: 134 [2021-06-05 21:57:35,142 INFO L226 Difference]: Without dead ends: 130 [2021-06-05 21:57:35,142 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 345.3ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:57:35,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-06-05 21:57:35,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2021-06-05 21:57:35,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.168) internal successors, (271), 125 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:35,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 271 transitions. [2021-06-05 21:57:35,143 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 271 transitions. Word has length 19 [2021-06-05 21:57:35,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:35,143 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 271 transitions. [2021-06-05 21:57:35,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:35,143 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 271 transitions. [2021-06-05 21:57:35,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:35,144 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:35,144 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:35,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2728,510 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:35,344 INFO L430 AbstractCegarLoop]: === Iteration 516 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:35,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:35,344 INFO L82 PathProgramCache]: Analyzing trace with hash -9234174, now seen corresponding path program 510 times [2021-06-05 21:57:35,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:35,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338732977] [2021-06-05 21:57:35,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:35,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:35,431 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:35,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:35,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338732977] [2021-06-05 21:57:35,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338732977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:35,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770782367] [2021-06-05 21:57:35,431 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:35,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:57:35,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:35,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:57:35,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:35,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:35,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:35,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:57:35,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:35,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:35,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:57:35,596 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:35,617 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 21:57:35,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:35,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 21:57:35,620 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:57:35,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:57:35,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:57:35,626 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 21:57:35,653 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:35,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770782367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:35,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:35,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:57:35,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892227315] [2021-06-05 21:57:35,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:57:35,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:35,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:57:35,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:57:35,654 INFO L87 Difference]: Start difference. First operand 126 states and 271 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:35,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:35,896 INFO L93 Difference]: Finished difference Result 155 states and 326 transitions. [2021-06-05 21:57:35,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:57:35,896 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:35,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:35,897 INFO L225 Difference]: With dead ends: 155 [2021-06-05 21:57:35,897 INFO L226 Difference]: Without dead ends: 155 [2021-06-05 21:57:35,897 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 295.0ms TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:57:35,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-06-05 21:57:35,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 122. [2021-06-05 21:57:35,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.1487603305785123) internal successors, (260), 121 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:35,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 260 transitions. [2021-06-05 21:57:35,898 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 260 transitions. Word has length 19 [2021-06-05 21:57:35,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:35,898 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 260 transitions. [2021-06-05 21:57:35,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:35,898 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 260 transitions. [2021-06-05 21:57:35,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:35,898 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:35,898 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:36,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2734,511 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:36,099 INFO L430 AbstractCegarLoop]: === Iteration 517 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:36,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:36,099 INFO L82 PathProgramCache]: Analyzing trace with hash -108978434, now seen corresponding path program 511 times [2021-06-05 21:57:36,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:36,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782605435] [2021-06-05 21:57:36,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:36,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:36,195 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:36,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:36,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782605435] [2021-06-05 21:57:36,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782605435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:36,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914667535] [2021-06-05 21:57:36,195 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:36,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:36,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:57:36,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:36,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:36,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:36,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:57:36,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:36,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:36,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:57:36,377 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:36,417 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-06-05 21:57:36,417 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:57:36,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 21:57:36,419 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:36,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:57:36,432 INFO L518 ElimStorePlain]: Eliminatee v_prenex_408 vanished before elimination [2021-06-05 21:57:36,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:57:36,433 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 21:57:36,474 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:36,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914667535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:36,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:36,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:57:36,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537111046] [2021-06-05 21:57:36,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:57:36,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:36,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:57:36,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:57:36,475 INFO L87 Difference]: Start difference. First operand 122 states and 260 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:36,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:36,912 INFO L93 Difference]: Finished difference Result 152 states and 312 transitions. [2021-06-05 21:57:36,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:57:36,912 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:36,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:36,912 INFO L225 Difference]: With dead ends: 152 [2021-06-05 21:57:36,912 INFO L226 Difference]: Without dead ends: 152 [2021-06-05 21:57:36,912 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 429.8ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:57:36,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-06-05 21:57:36,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 125. [2021-06-05 21:57:36,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.161290322580645) internal successors, (268), 124 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:36,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 268 transitions. [2021-06-05 21:57:36,913 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 268 transitions. Word has length 19 [2021-06-05 21:57:36,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:36,914 INFO L482 AbstractCegarLoop]: Abstraction has 125 states and 268 transitions. [2021-06-05 21:57:36,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:36,914 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 268 transitions. [2021-06-05 21:57:36,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:36,914 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:36,914 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:37,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2736 [2021-06-05 21:57:37,114 INFO L430 AbstractCegarLoop]: === Iteration 518 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:37,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:37,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1251138306, now seen corresponding path program 512 times [2021-06-05 21:57:37,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:37,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099160755] [2021-06-05 21:57:37,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:37,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:37,192 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:37,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:37,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099160755] [2021-06-05 21:57:37,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099160755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:37,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65085829] [2021-06-05 21:57:37,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:37,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:57:37,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:37,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:57:37,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:37,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:37,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:37,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:57:37,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:37,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:37,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:57:37,343 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:37,390 INFO L628 ElimStorePlain]: treesize reduction 72, result has 39.5 percent of original size [2021-06-05 21:57:37,390 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:57:37,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:37,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:57:37,393 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:37,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:57:37,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:37,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 21:57:37,412 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:57:37,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:57:37,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:57:37,429 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-06-05 21:57:37,471 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:37,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65085829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:37,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:37,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:57:37,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560597332] [2021-06-05 21:57:37,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:57:37,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:37,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:57:37,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:57:37,471 INFO L87 Difference]: Start difference. First operand 125 states and 268 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:37,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:37,860 INFO L93 Difference]: Finished difference Result 199 states and 404 transitions. [2021-06-05 21:57:37,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:57:37,861 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:37,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:37,861 INFO L225 Difference]: With dead ends: 199 [2021-06-05 21:57:37,861 INFO L226 Difference]: Without dead ends: 199 [2021-06-05 21:57:37,861 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 374.1ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:57:37,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-05 21:57:37,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 127. [2021-06-05 21:57:37,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.1904761904761907) internal successors, (276), 126 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:37,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 276 transitions. [2021-06-05 21:57:37,862 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 276 transitions. Word has length 19 [2021-06-05 21:57:37,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:37,862 INFO L482 AbstractCegarLoop]: Abstraction has 127 states and 276 transitions. [2021-06-05 21:57:37,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:37,862 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 276 transitions. [2021-06-05 21:57:37,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:37,863 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:37,863 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:38,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 513 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2743 [2021-06-05 21:57:38,063 INFO L430 AbstractCegarLoop]: === Iteration 519 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:38,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:38,063 INFO L82 PathProgramCache]: Analyzing trace with hash -981913688, now seen corresponding path program 513 times [2021-06-05 21:57:38,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:38,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490502221] [2021-06-05 21:57:38,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:38,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:38,155 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:38,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:38,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490502221] [2021-06-05 21:57:38,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490502221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:38,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937996786] [2021-06-05 21:57:38,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:38,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:57:38,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:38,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:57:38,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:38,339 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:38,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937996786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:38,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:38,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:57:38,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411190421] [2021-06-05 21:57:38,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:57:38,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:38,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:57:38,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:57:38,340 INFO L87 Difference]: Start difference. First operand 127 states and 276 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:38,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:38,711 INFO L93 Difference]: Finished difference Result 135 states and 286 transitions. [2021-06-05 21:57:38,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:57:38,711 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:38,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:38,712 INFO L225 Difference]: With dead ends: 135 [2021-06-05 21:57:38,712 INFO L226 Difference]: Without dead ends: 131 [2021-06-05 21:57:38,712 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 398.6ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:57:38,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-06-05 21:57:38,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2021-06-05 21:57:38,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.1825396825396823) internal successors, (275), 126 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:38,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 275 transitions. [2021-06-05 21:57:38,713 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 275 transitions. Word has length 19 [2021-06-05 21:57:38,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:38,713 INFO L482 AbstractCegarLoop]: Abstraction has 127 states and 275 transitions. [2021-06-05 21:57:38,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:38,713 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 275 transitions. [2021-06-05 21:57:38,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:38,713 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:38,713 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:38,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2747,514 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:38,914 INFO L430 AbstractCegarLoop]: === Iteration 520 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:38,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:38,914 INFO L82 PathProgramCache]: Analyzing trace with hash -895032454, now seen corresponding path program 514 times [2021-06-05 21:57:38,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:38,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659067976] [2021-06-05 21:57:38,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:38,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:38,993 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:38,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:38,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659067976] [2021-06-05 21:57:38,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659067976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:38,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608974045] [2021-06-05 21:57:38,993 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:39,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:57:39,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:39,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:57:39,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:39,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:39,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:39,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:57:39,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:39,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:39,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:57:39,150 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:39,169 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 21:57:39,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:39,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 21:57:39,172 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:57:39,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:57:39,178 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:57:39,178 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 21:57:39,197 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:39,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608974045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:39,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:39,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:57:39,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474974884] [2021-06-05 21:57:39,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:57:39,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:39,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:57:39,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:57:39,198 INFO L87 Difference]: Start difference. First operand 127 states and 275 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:39,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:39,528 INFO L93 Difference]: Finished difference Result 162 states and 341 transitions. [2021-06-05 21:57:39,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:57:39,528 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:39,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:39,529 INFO L225 Difference]: With dead ends: 162 [2021-06-05 21:57:39,529 INFO L226 Difference]: Without dead ends: 162 [2021-06-05 21:57:39,529 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 388.8ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:57:39,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-06-05 21:57:39,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 126. [2021-06-05 21:57:39,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.184) internal successors, (273), 125 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:39,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 273 transitions. [2021-06-05 21:57:39,530 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 273 transitions. Word has length 19 [2021-06-05 21:57:39,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:39,530 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 273 transitions. [2021-06-05 21:57:39,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:39,530 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 273 transitions. [2021-06-05 21:57:39,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:39,530 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:39,530 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:39,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 515 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2752 [2021-06-05 21:57:39,731 INFO L430 AbstractCegarLoop]: === Iteration 521 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:39,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:39,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1488259954, now seen corresponding path program 515 times [2021-06-05 21:57:39,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:39,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471093703] [2021-06-05 21:57:39,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:39,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:39,814 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:39,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:39,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471093703] [2021-06-05 21:57:39,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471093703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:39,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060198514] [2021-06-05 21:57:39,814 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:39,841 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:57:39,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:39,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:57:39,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:39,989 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:39,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060198514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:39,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:39,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:57:39,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080701394] [2021-06-05 21:57:39,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:57:39,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:39,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:57:39,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:57:39,990 INFO L87 Difference]: Start difference. First operand 126 states and 273 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:40,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:40,287 INFO L93 Difference]: Finished difference Result 132 states and 280 transitions. [2021-06-05 21:57:40,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:57:40,287 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:40,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:40,288 INFO L225 Difference]: With dead ends: 132 [2021-06-05 21:57:40,288 INFO L226 Difference]: Without dead ends: 126 [2021-06-05 21:57:40,288 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 326.6ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:57:40,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-05 21:57:40,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2021-06-05 21:57:40,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.176) internal successors, (272), 125 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:40,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 272 transitions. [2021-06-05 21:57:40,289 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 272 transitions. Word has length 19 [2021-06-05 21:57:40,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:40,289 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 272 transitions. [2021-06-05 21:57:40,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:40,289 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 272 transitions. [2021-06-05 21:57:40,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:40,289 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:40,289 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:40,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2754,516 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:40,490 INFO L430 AbstractCegarLoop]: === Iteration 522 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:40,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:40,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1293150722, now seen corresponding path program 516 times [2021-06-05 21:57:40,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:40,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960308643] [2021-06-05 21:57:40,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:40,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:40,613 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:40,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:40,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960308643] [2021-06-05 21:57:40,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960308643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:40,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512744838] [2021-06-05 21:57:40,614 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:40,685 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:57:40,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:40,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:57:40,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:40,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:40,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:40,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:57:40,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:40,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:40,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:57:40,850 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:40,871 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 21:57:40,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:40,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 21:57:40,875 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:57:40,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:57:40,881 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:57:40,881 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 21:57:40,899 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:40,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512744838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:40,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:40,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:57:40,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760738893] [2021-06-05 21:57:40,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:57:40,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:40,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:57:40,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:57:40,900 INFO L87 Difference]: Start difference. First operand 126 states and 272 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:41,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:41,059 INFO L93 Difference]: Finished difference Result 153 states and 322 transitions. [2021-06-05 21:57:41,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:57:41,060 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:41,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:41,060 INFO L225 Difference]: With dead ends: 153 [2021-06-05 21:57:41,060 INFO L226 Difference]: Without dead ends: 153 [2021-06-05 21:57:41,060 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 246.9ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:57:41,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-06-05 21:57:41,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 121. [2021-06-05 21:57:41,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.15) internal successors, (258), 120 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:41,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 258 transitions. [2021-06-05 21:57:41,061 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 258 transitions. Word has length 19 [2021-06-05 21:57:41,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:41,061 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 258 transitions. [2021-06-05 21:57:41,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:41,061 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 258 transitions. [2021-06-05 21:57:41,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:41,062 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:41,062 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:41,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 517 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2760 [2021-06-05 21:57:41,262 INFO L430 AbstractCegarLoop]: === Iteration 523 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:41,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:41,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1574989870, now seen corresponding path program 517 times [2021-06-05 21:57:41,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:41,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293189148] [2021-06-05 21:57:41,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:41,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:41,350 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:41,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:41,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293189148] [2021-06-05 21:57:41,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293189148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:41,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387954003] [2021-06-05 21:57:41,351 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:41,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:41,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:57:41,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:41,570 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:41,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387954003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:41,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:41,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:57:41,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188662993] [2021-06-05 21:57:41,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:57:41,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:41,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:57:41,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:57:41,570 INFO L87 Difference]: Start difference. First operand 121 states and 258 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:42,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:42,074 INFO L93 Difference]: Finished difference Result 170 states and 347 transitions. [2021-06-05 21:57:42,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:57:42,075 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:42,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:42,075 INFO L225 Difference]: With dead ends: 170 [2021-06-05 21:57:42,075 INFO L226 Difference]: Without dead ends: 167 [2021-06-05 21:57:42,075 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 497.8ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:57:42,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-05 21:57:42,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 132. [2021-06-05 21:57:42,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.198473282442748) internal successors, (288), 131 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:42,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 288 transitions. [2021-06-05 21:57:42,076 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 288 transitions. Word has length 19 [2021-06-05 21:57:42,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:42,077 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 288 transitions. [2021-06-05 21:57:42,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:42,077 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 288 transitions. [2021-06-05 21:57:42,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:42,077 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:42,077 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:42,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 518 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2762 [2021-06-05 21:57:42,277 INFO L430 AbstractCegarLoop]: === Iteration 524 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:42,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:42,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1798921338, now seen corresponding path program 518 times [2021-06-05 21:57:42,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:42,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379887745] [2021-06-05 21:57:42,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:42,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:42,402 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:42,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:42,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379887745] [2021-06-05 21:57:42,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379887745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:42,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056890029] [2021-06-05 21:57:42,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:42,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:57:42,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:42,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:57:42,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:42,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:42,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:42,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:57:42,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:42,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:42,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:57:42,615 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:42,667 INFO L628 ElimStorePlain]: treesize reduction 78, result has 40.5 percent of original size [2021-06-05 21:57:42,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 21:57:42,671 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:42,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:57:42,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:42,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 21:57:42,694 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:57:42,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:57:42,712 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:57:42,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:57:42,713 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-06-05 21:57:42,769 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:42,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056890029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:42,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:42,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:57:42,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289745983] [2021-06-05 21:57:42,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:57:42,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:42,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:57:42,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:57:42,769 INFO L87 Difference]: Start difference. First operand 132 states and 288 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:42,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:42,994 INFO L93 Difference]: Finished difference Result 162 states and 337 transitions. [2021-06-05 21:57:42,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:57:42,994 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:42,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:42,994 INFO L225 Difference]: With dead ends: 162 [2021-06-05 21:57:42,995 INFO L226 Difference]: Without dead ends: 162 [2021-06-05 21:57:42,995 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 318.5ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:57:42,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-06-05 21:57:42,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 132. [2021-06-05 21:57:42,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.198473282442748) internal successors, (288), 131 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:42,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 288 transitions. [2021-06-05 21:57:42,996 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 288 transitions. Word has length 19 [2021-06-05 21:57:42,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:42,996 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 288 transitions. [2021-06-05 21:57:42,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:42,996 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 288 transitions. [2021-06-05 21:57:42,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:42,996 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:42,996 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:43,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 519 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2773 [2021-06-05 21:57:43,197 INFO L430 AbstractCegarLoop]: === Iteration 525 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:43,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:43,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1085255126, now seen corresponding path program 519 times [2021-06-05 21:57:43,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:43,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31004112] [2021-06-05 21:57:43,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:43,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:43,343 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:43,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:43,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31004112] [2021-06-05 21:57:43,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31004112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:43,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958341257] [2021-06-05 21:57:43,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:43,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:57:43,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:43,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:57:43,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:43,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:43,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:43,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:57:43,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:43,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:43,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:57:43,554 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:43,593 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-06-05 21:57:43,593 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:57:43,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 21:57:43,596 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:43,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:57:43,609 INFO L518 ElimStorePlain]: Eliminatee v_prenex_420 vanished before elimination [2021-06-05 21:57:43,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:57:43,610 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 21:57:43,643 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:43,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958341257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:43,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:43,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:57:43,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234904152] [2021-06-05 21:57:43,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:57:43,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:43,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:57:43,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:57:43,643 INFO L87 Difference]: Start difference. First operand 132 states and 288 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:44,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:44,263 INFO L93 Difference]: Finished difference Result 164 states and 338 transitions. [2021-06-05 21:57:44,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:57:44,264 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:44,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:44,264 INFO L225 Difference]: With dead ends: 164 [2021-06-05 21:57:44,264 INFO L226 Difference]: Without dead ends: 162 [2021-06-05 21:57:44,264 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 610.9ms TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:57:44,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-06-05 21:57:44,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 132. [2021-06-05 21:57:44,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.1908396946564888) internal successors, (287), 131 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:44,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 287 transitions. [2021-06-05 21:57:44,265 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 287 transitions. Word has length 19 [2021-06-05 21:57:44,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:44,265 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 287 transitions. [2021-06-05 21:57:44,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:44,265 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 287 transitions. [2021-06-05 21:57:44,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:44,266 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:44,266 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:44,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2779,520 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:44,466 INFO L430 AbstractCegarLoop]: === Iteration 526 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:44,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:44,466 INFO L82 PathProgramCache]: Analyzing trace with hash -438804598, now seen corresponding path program 520 times [2021-06-05 21:57:44,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:44,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559529830] [2021-06-05 21:57:44,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:44,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:44,551 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:44,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:44,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559529830] [2021-06-05 21:57:44,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559529830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:44,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935945920] [2021-06-05 21:57:44,551 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:44,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:57:44,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:44,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:57:44,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:44,779 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:44,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935945920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:44,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:44,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:57:44,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703184076] [2021-06-05 21:57:44,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:57:44,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:44,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:57:44,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:57:44,780 INFO L87 Difference]: Start difference. First operand 132 states and 287 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:45,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:45,328 INFO L93 Difference]: Finished difference Result 177 states and 363 transitions. [2021-06-05 21:57:45,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:57:45,328 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:45,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:45,329 INFO L225 Difference]: With dead ends: 177 [2021-06-05 21:57:45,329 INFO L226 Difference]: Without dead ends: 177 [2021-06-05 21:57:45,329 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 512.5ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:57:45,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-06-05 21:57:45,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 131. [2021-06-05 21:57:45,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.1923076923076925) internal successors, (285), 130 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:45,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 285 transitions. [2021-06-05 21:57:45,330 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 285 transitions. Word has length 19 [2021-06-05 21:57:45,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:45,330 INFO L482 AbstractCegarLoop]: Abstraction has 131 states and 285 transitions. [2021-06-05 21:57:45,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:45,330 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 285 transitions. [2021-06-05 21:57:45,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:45,330 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:45,330 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:45,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 521 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2787 [2021-06-05 21:57:45,531 INFO L430 AbstractCegarLoop]: === Iteration 527 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:45,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:45,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1623110704, now seen corresponding path program 521 times [2021-06-05 21:57:45,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:45,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253330085] [2021-06-05 21:57:45,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:45,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:45,663 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:45,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:45,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253330085] [2021-06-05 21:57:45,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253330085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:45,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431309319] [2021-06-05 21:57:45,664 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:45,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:57:45,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:45,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:57:45,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:45,884 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:45,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431309319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:45,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:45,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:57:45,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822904481] [2021-06-05 21:57:45,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:57:45,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:45,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:57:45,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:57:45,885 INFO L87 Difference]: Start difference. First operand 131 states and 285 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:46,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:46,363 INFO L93 Difference]: Finished difference Result 142 states and 300 transitions. [2021-06-05 21:57:46,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:57:46,364 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:46,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:46,364 INFO L225 Difference]: With dead ends: 142 [2021-06-05 21:57:46,364 INFO L226 Difference]: Without dead ends: 138 [2021-06-05 21:57:46,364 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 512.5ms TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:57:46,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-06-05 21:57:46,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 131. [2021-06-05 21:57:46,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.1846153846153844) internal successors, (284), 130 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:46,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 284 transitions. [2021-06-05 21:57:46,365 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 284 transitions. Word has length 19 [2021-06-05 21:57:46,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:46,365 INFO L482 AbstractCegarLoop]: Abstraction has 131 states and 284 transitions. [2021-06-05 21:57:46,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:46,365 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 284 transitions. [2021-06-05 21:57:46,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:46,365 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:46,365 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:46,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2799,522 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:46,566 INFO L430 AbstractCegarLoop]: === Iteration 528 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:46,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:46,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1709991938, now seen corresponding path program 522 times [2021-06-05 21:57:46,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:46,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678576533] [2021-06-05 21:57:46,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:46,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:46,647 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:46,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:46,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678576533] [2021-06-05 21:57:46,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678576533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:46,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497985585] [2021-06-05 21:57:46,648 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:46,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:57:46,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:46,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:57:46,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:46,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:46,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:46,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:57:46,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:46,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:46,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:57:46,826 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:46,844 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 21:57:46,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:46,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 21:57:46,847 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:57:46,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:57:46,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:57:46,853 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 21:57:46,872 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:46,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497985585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:46,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:46,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:57:46,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762832946] [2021-06-05 21:57:46,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:57:46,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:46,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:57:46,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:57:46,873 INFO L87 Difference]: Start difference. First operand 131 states and 284 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:47,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:47,341 INFO L93 Difference]: Finished difference Result 173 states and 362 transitions. [2021-06-05 21:57:47,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:57:47,342 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:47,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:47,342 INFO L225 Difference]: With dead ends: 173 [2021-06-05 21:57:47,342 INFO L226 Difference]: Without dead ends: 173 [2021-06-05 21:57:47,342 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 414.6ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:57:47,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-06-05 21:57:47,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 130. [2021-06-05 21:57:47,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.186046511627907) internal successors, (282), 129 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:47,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 282 transitions. [2021-06-05 21:57:47,343 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 282 transitions. Word has length 19 [2021-06-05 21:57:47,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:47,343 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 282 transitions. [2021-06-05 21:57:47,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:47,344 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 282 transitions. [2021-06-05 21:57:47,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:47,344 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:47,344 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:47,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2804,523 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:47,544 INFO L430 AbstractCegarLoop]: === Iteration 529 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:47,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:47,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1116764438, now seen corresponding path program 523 times [2021-06-05 21:57:47,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:47,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538663821] [2021-06-05 21:57:47,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:47,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:47,651 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:47,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:47,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538663821] [2021-06-05 21:57:47,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538663821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:47,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334390601] [2021-06-05 21:57:47,651 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:47,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:47,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:57:47,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:47,835 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:47,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334390601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:47,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:47,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:57:47,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724905594] [2021-06-05 21:57:47,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:57:47,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:47,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:57:47,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:57:47,836 INFO L87 Difference]: Start difference. First operand 130 states and 282 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:48,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:48,244 INFO L93 Difference]: Finished difference Result 140 states and 295 transitions. [2021-06-05 21:57:48,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:57:48,244 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:48,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:48,244 INFO L225 Difference]: With dead ends: 140 [2021-06-05 21:57:48,244 INFO L226 Difference]: Without dead ends: 134 [2021-06-05 21:57:48,244 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 436.6ms TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:57:48,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-06-05 21:57:48,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 130. [2021-06-05 21:57:48,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.1782945736434107) internal successors, (281), 129 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:48,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 281 transitions. [2021-06-05 21:57:48,246 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 281 transitions. Word has length 19 [2021-06-05 21:57:48,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:48,246 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 281 transitions. [2021-06-05 21:57:48,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:48,246 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 281 transitions. [2021-06-05 21:57:48,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:48,246 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:48,246 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:48,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2806,524 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:48,446 INFO L430 AbstractCegarLoop]: === Iteration 530 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:48,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:48,447 INFO L82 PathProgramCache]: Analyzing trace with hash -396792182, now seen corresponding path program 524 times [2021-06-05 21:57:48,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:48,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854827801] [2021-06-05 21:57:48,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:48,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:48,526 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:48,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:48,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854827801] [2021-06-05 21:57:48,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854827801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:48,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530281287] [2021-06-05 21:57:48,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:48,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:57:48,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:48,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:57:48,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:48,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:48,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:48,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:57:48,689 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:48,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:48,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:57:48,692 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:48,710 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 21:57:48,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:48,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 21:57:48,713 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:57:48,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:57:48,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:57:48,719 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 21:57:48,744 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:48,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530281287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:48,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:48,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:57:48,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333153400] [2021-06-05 21:57:48,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:57:48,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:48,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:57:48,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:57:48,745 INFO L87 Difference]: Start difference. First operand 130 states and 281 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:49,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:49,133 INFO L93 Difference]: Finished difference Result 166 states and 349 transitions. [2021-06-05 21:57:49,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:57:49,134 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:49,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:49,134 INFO L225 Difference]: With dead ends: 166 [2021-06-05 21:57:49,134 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 21:57:49,134 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 399.6ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:57:49,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 21:57:49,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 129. [2021-06-05 21:57:49,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.1796875) internal successors, (279), 128 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:49,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 279 transitions. [2021-06-05 21:57:49,135 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 279 transitions. Word has length 19 [2021-06-05 21:57:49,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:49,135 INFO L482 AbstractCegarLoop]: Abstraction has 129 states and 279 transitions. [2021-06-05 21:57:49,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:49,135 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 279 transitions. [2021-06-05 21:57:49,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:49,136 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:49,136 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:49,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2811,525 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:49,336 INFO L430 AbstractCegarLoop]: === Iteration 531 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:49,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:49,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1695067920, now seen corresponding path program 525 times [2021-06-05 21:57:49,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:49,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908044983] [2021-06-05 21:57:49,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:49,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:49,417 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:49,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:49,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908044983] [2021-06-05 21:57:49,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908044983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:49,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057170750] [2021-06-05 21:57:49,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:49,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:57:49,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:49,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:57:49,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:49,581 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:49,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057170750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:49,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:49,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:57:49,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048631848] [2021-06-05 21:57:49,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:57:49,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:49,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:57:49,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:57:49,582 INFO L87 Difference]: Start difference. First operand 129 states and 279 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:49,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:49,815 INFO L93 Difference]: Finished difference Result 137 states and 289 transitions. [2021-06-05 21:57:49,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:57:49,815 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:49,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:49,816 INFO L225 Difference]: With dead ends: 137 [2021-06-05 21:57:49,816 INFO L226 Difference]: Without dead ends: 129 [2021-06-05 21:57:49,816 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 260.6ms TimeCoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:57:49,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-06-05 21:57:49,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-06-05 21:57:49,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.171875) internal successors, (278), 128 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:49,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 278 transitions. [2021-06-05 21:57:49,817 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 278 transitions. Word has length 19 [2021-06-05 21:57:49,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:49,817 INFO L482 AbstractCegarLoop]: Abstraction has 129 states and 278 transitions. [2021-06-05 21:57:49,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:49,817 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 278 transitions. [2021-06-05 21:57:49,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:49,817 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:49,817 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:50,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 526 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2813 [2021-06-05 21:57:50,018 INFO L430 AbstractCegarLoop]: === Iteration 532 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:50,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:50,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1282590462, now seen corresponding path program 526 times [2021-06-05 21:57:50,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:50,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080288321] [2021-06-05 21:57:50,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:50,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:50,092 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:50,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:50,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080288321] [2021-06-05 21:57:50,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080288321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:50,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608183769] [2021-06-05 21:57:50,092 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:50,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:57:50,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:50,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:57:50,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:50,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:50,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:50,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:57:50,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:50,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:50,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:57:50,246 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:50,264 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 21:57:50,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:50,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 21:57:50,267 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:57:50,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:57:50,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:57:50,273 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 21:57:50,291 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:50,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608183769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:50,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:50,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 21:57:50,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134404899] [2021-06-05 21:57:50,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:57:50,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:50,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:57:50,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:57:50,292 INFO L87 Difference]: Start difference. First operand 129 states and 278 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:50,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:50,442 INFO L93 Difference]: Finished difference Result 143 states and 302 transitions. [2021-06-05 21:57:50,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:57:50,443 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:50,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:50,443 INFO L225 Difference]: With dead ends: 143 [2021-06-05 21:57:50,443 INFO L226 Difference]: Without dead ends: 143 [2021-06-05 21:57:50,443 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 167.3ms TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:57:50,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-06-05 21:57:50,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 119. [2021-06-05 21:57:50,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.152542372881356) internal successors, (254), 118 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:50,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 254 transitions. [2021-06-05 21:57:50,444 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 254 transitions. Word has length 19 [2021-06-05 21:57:50,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:50,444 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 254 transitions. [2021-06-05 21:57:50,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:50,444 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 254 transitions. [2021-06-05 21:57:50,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:50,444 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:50,444 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:50,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2818,527 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:50,645 INFO L430 AbstractCegarLoop]: === Iteration 533 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:50,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:50,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1207617126, now seen corresponding path program 527 times [2021-06-05 21:57:50,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:50,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012290259] [2021-06-05 21:57:50,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:50,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:50,736 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:50,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:50,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012290259] [2021-06-05 21:57:50,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012290259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:50,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175781245] [2021-06-05 21:57:50,737 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:50,762 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:57:50,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:50,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:57:50,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:50,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:50,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:50,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:57:50,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:50,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:50,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:57:50,862 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:50,876 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-06-05 21:57:50,876 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:57:50,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:57:50,877 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-06-05 21:57:50,891 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:50,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175781245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:50,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:50,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:57:50,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994674516] [2021-06-05 21:57:50,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:57:50,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:50,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:57:50,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:57:50,892 INFO L87 Difference]: Start difference. First operand 119 states and 254 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:51,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:51,196 INFO L93 Difference]: Finished difference Result 160 states and 336 transitions. [2021-06-05 21:57:51,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:57:51,196 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:51,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:51,197 INFO L225 Difference]: With dead ends: 160 [2021-06-05 21:57:51,197 INFO L226 Difference]: Without dead ends: 160 [2021-06-05 21:57:51,197 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 292.7ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:57:51,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-06-05 21:57:51,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 119. [2021-06-05 21:57:51,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.152542372881356) internal successors, (254), 118 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:51,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 254 transitions. [2021-06-05 21:57:51,198 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 254 transitions. Word has length 19 [2021-06-05 21:57:51,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:51,198 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 254 transitions. [2021-06-05 21:57:51,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:51,198 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 254 transitions. [2021-06-05 21:57:51,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:51,198 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:51,198 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:51,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 528 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2820 [2021-06-05 21:57:51,399 INFO L430 AbstractCegarLoop]: === Iteration 534 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:51,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:51,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1567533644, now seen corresponding path program 528 times [2021-06-05 21:57:51,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:51,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529005622] [2021-06-05 21:57:51,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:51,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:51,479 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:51,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:51,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529005622] [2021-06-05 21:57:51,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529005622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:51,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273875988] [2021-06-05 21:57:51,480 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:51,505 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:57:51,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:51,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:57:51,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:51,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:51,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:51,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:57:51,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:51,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:51,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:51,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:57:51,606 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:51,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:51,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:51,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:57:51,609 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:51,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:51,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:57:51,612 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:51,643 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 21:57:51,643 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:57:51,644 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:57:51,644 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 21:57:51,679 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:51,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273875988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:51,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:51,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:57:51,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503514019] [2021-06-05 21:57:51,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:57:51,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:51,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:57:51,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:57:51,680 INFO L87 Difference]: Start difference. First operand 119 states and 254 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:52,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:52,147 INFO L93 Difference]: Finished difference Result 175 states and 367 transitions. [2021-06-05 21:57:52,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:57:52,147 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:52,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:52,147 INFO L225 Difference]: With dead ends: 175 [2021-06-05 21:57:52,147 INFO L226 Difference]: Without dead ends: 175 [2021-06-05 21:57:52,147 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 362.9ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:57:52,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-06-05 21:57:52,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 119. [2021-06-05 21:57:52,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.152542372881356) internal successors, (254), 118 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:52,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 254 transitions. [2021-06-05 21:57:52,149 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 254 transitions. Word has length 19 [2021-06-05 21:57:52,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:52,149 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 254 transitions. [2021-06-05 21:57:52,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:52,149 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 254 transitions. [2021-06-05 21:57:52,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:52,149 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:52,149 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:52,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2824,529 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:52,349 INFO L430 AbstractCegarLoop]: === Iteration 535 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:52,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:52,349 INFO L82 PathProgramCache]: Analyzing trace with hash -857485874, now seen corresponding path program 529 times [2021-06-05 21:57:52,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:52,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755178844] [2021-06-05 21:57:52,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:52,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:52,436 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:52,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:52,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755178844] [2021-06-05 21:57:52,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755178844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:52,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818446066] [2021-06-05 21:57:52,437 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:52,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:52,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:57:52,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:52,570 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:52,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818446066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:52,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:52,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 21:57:52,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335154349] [2021-06-05 21:57:52,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:57:52,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:52,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:57:52,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:57:52,571 INFO L87 Difference]: Start difference. First operand 119 states and 254 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:52,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:52,890 INFO L93 Difference]: Finished difference Result 142 states and 300 transitions. [2021-06-05 21:57:52,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:57:52,890 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:52,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:52,890 INFO L225 Difference]: With dead ends: 142 [2021-06-05 21:57:52,890 INFO L226 Difference]: Without dead ends: 142 [2021-06-05 21:57:52,890 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 291.0ms TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:57:52,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-06-05 21:57:52,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 117. [2021-06-05 21:57:52,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.1551724137931036) internal successors, (250), 116 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:52,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 250 transitions. [2021-06-05 21:57:52,891 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 250 transitions. Word has length 19 [2021-06-05 21:57:52,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:52,892 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 250 transitions. [2021-06-05 21:57:52,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:52,892 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 250 transitions. [2021-06-05 21:57:52,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:52,892 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:52,892 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:53,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2834,530 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:53,092 INFO L430 AbstractCegarLoop]: === Iteration 536 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:53,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:53,092 INFO L82 PathProgramCache]: Analyzing trace with hash 620649532, now seen corresponding path program 530 times [2021-06-05 21:57:53,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:53,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641497583] [2021-06-05 21:57:53,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:53,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:53,178 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:53,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:53,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641497583] [2021-06-05 21:57:53,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641497583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:53,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050843638] [2021-06-05 21:57:53,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:53,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:57:53,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:53,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:57:53,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:53,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:53,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:53,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:57:53,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:53,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:53,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:57:53,320 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:53,358 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-06-05 21:57:53,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 21:57:53,361 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:53,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:57:53,373 INFO L518 ElimStorePlain]: Eliminatee v_prenex_427 vanished before elimination [2021-06-05 21:57:53,373 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:57:53,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:57:53,374 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 21:57:53,400 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:53,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050843638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:53,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:53,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 21:57:53,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118974590] [2021-06-05 21:57:53,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:57:53,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:53,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:57:53,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:57:53,400 INFO L87 Difference]: Start difference. First operand 117 states and 250 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:53,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:53,787 INFO L93 Difference]: Finished difference Result 161 states and 331 transitions. [2021-06-05 21:57:53,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:57:53,787 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:53,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:53,787 INFO L225 Difference]: With dead ends: 161 [2021-06-05 21:57:53,787 INFO L226 Difference]: Without dead ends: 161 [2021-06-05 21:57:53,787 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 374.3ms TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:57:53,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-06-05 21:57:53,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 117. [2021-06-05 21:57:53,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.1551724137931036) internal successors, (250), 116 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:53,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 250 transitions. [2021-06-05 21:57:53,789 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 250 transitions. Word has length 19 [2021-06-05 21:57:53,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:53,789 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 250 transitions. [2021-06-05 21:57:53,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:53,789 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 250 transitions. [2021-06-05 21:57:53,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:53,789 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:53,789 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:53,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 531 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2844 [2021-06-05 21:57:53,989 INFO L430 AbstractCegarLoop]: === Iteration 537 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:53,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:53,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1330697302, now seen corresponding path program 531 times [2021-06-05 21:57:53,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:53,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603018336] [2021-06-05 21:57:53,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:53,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:54,076 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:54,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:54,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603018336] [2021-06-05 21:57:54,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603018336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:54,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061592757] [2021-06-05 21:57:54,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:54,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:57:54,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:54,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:57:54,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:54,232 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:54,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061592757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:54,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:54,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 21:57:54,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968184461] [2021-06-05 21:57:54,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:57:54,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:54,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:57:54,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:57:54,233 INFO L87 Difference]: Start difference. First operand 117 states and 250 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:54,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:54,669 INFO L93 Difference]: Finished difference Result 204 states and 413 transitions. [2021-06-05 21:57:54,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:57:54,669 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:54,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:54,669 INFO L225 Difference]: With dead ends: 204 [2021-06-05 21:57:54,670 INFO L226 Difference]: Without dead ends: 204 [2021-06-05 21:57:54,670 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 392.5ms TimeCoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:57:54,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-06-05 21:57:54,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 118. [2021-06-05 21:57:54,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.1794871794871793) internal successors, (255), 117 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:54,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 255 transitions. [2021-06-05 21:57:54,671 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 255 transitions. Word has length 19 [2021-06-05 21:57:54,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:54,671 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 255 transitions. [2021-06-05 21:57:54,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:54,671 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 255 transitions. [2021-06-05 21:57:54,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:54,671 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:54,671 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:54,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 532 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2851 [2021-06-05 21:57:54,877 INFO L430 AbstractCegarLoop]: === Iteration 538 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:54,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:54,877 INFO L82 PathProgramCache]: Analyzing trace with hash -902354692, now seen corresponding path program 532 times [2021-06-05 21:57:54,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:54,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810417058] [2021-06-05 21:57:54,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:54,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:54,969 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:54,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:54,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810417058] [2021-06-05 21:57:54,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810417058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:54,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620601634] [2021-06-05 21:57:54,970 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:54,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:57:54,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:54,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:57:54,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:55,107 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:55,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620601634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:55,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:55,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 21:57:55,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055733248] [2021-06-05 21:57:55,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:57:55,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:55,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:57:55,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:57:55,108 INFO L87 Difference]: Start difference. First operand 118 states and 255 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:55,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:55,485 INFO L93 Difference]: Finished difference Result 127 states and 269 transitions. [2021-06-05 21:57:55,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:57:55,486 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:55,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:55,486 INFO L225 Difference]: With dead ends: 127 [2021-06-05 21:57:55,486 INFO L226 Difference]: Without dead ends: 123 [2021-06-05 21:57:55,486 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 354.2ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:57:55,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-06-05 21:57:55,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 118. [2021-06-05 21:57:55,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.1709401709401708) internal successors, (254), 117 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:55,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 254 transitions. [2021-06-05 21:57:55,487 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 254 transitions. Word has length 19 [2021-06-05 21:57:55,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:55,487 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 254 transitions. [2021-06-05 21:57:55,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:55,487 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 254 transitions. [2021-06-05 21:57:55,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:55,487 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:55,487 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:55,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 533 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2861 [2021-06-05 21:57:55,688 INFO L430 AbstractCegarLoop]: === Iteration 539 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:55,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:55,688 INFO L82 PathProgramCache]: Analyzing trace with hash -815473458, now seen corresponding path program 533 times [2021-06-05 21:57:55,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:55,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832399312] [2021-06-05 21:57:55,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:55,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:55,769 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:55,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:55,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832399312] [2021-06-05 21:57:55,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832399312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:55,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651797186] [2021-06-05 21:57:55,770 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:55,795 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:57:55,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:55,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:57:55,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:55,901 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:55,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651797186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:55,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:55,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 21:57:55,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2338415] [2021-06-05 21:57:55,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:57:55,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:55,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:57:55,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:57:55,902 INFO L87 Difference]: Start difference. First operand 118 states and 254 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:56,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:56,176 INFO L93 Difference]: Finished difference Result 150 states and 315 transitions. [2021-06-05 21:57:56,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:57:56,176 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:56,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:56,176 INFO L225 Difference]: With dead ends: 150 [2021-06-05 21:57:56,176 INFO L226 Difference]: Without dead ends: 150 [2021-06-05 21:57:56,176 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 251.0ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:57:56,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-06-05 21:57:56,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 114. [2021-06-05 21:57:56,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.150442477876106) internal successors, (243), 113 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:56,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 243 transitions. [2021-06-05 21:57:56,177 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 243 transitions. Word has length 19 [2021-06-05 21:57:56,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:56,177 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 243 transitions. [2021-06-05 21:57:56,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:56,177 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 243 transitions. [2021-06-05 21:57:56,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:56,178 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:56,178 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:56,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2866,534 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:56,378 INFO L430 AbstractCegarLoop]: === Iteration 540 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:56,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:56,378 INFO L82 PathProgramCache]: Analyzing trace with hash -915217718, now seen corresponding path program 534 times [2021-06-05 21:57:56,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:56,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44946765] [2021-06-05 21:57:56,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:56,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:56,466 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:56,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:56,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44946765] [2021-06-05 21:57:56,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44946765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:56,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124009762] [2021-06-05 21:57:56,467 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:56,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:57:56,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:56,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:57:56,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:56,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:56,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:56,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:57:56,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:56,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:57:56,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:57:56,625 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:56,672 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-06-05 21:57:56,672 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:57:56,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 21:57:56,675 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:57:56,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:57:56,688 INFO L518 ElimStorePlain]: Eliminatee v_prenex_431 vanished before elimination [2021-06-05 21:57:56,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:57:56,689 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 21:57:56,732 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:56,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124009762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:56,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:56,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:57:56,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42801527] [2021-06-05 21:57:56,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:57:56,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:56,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:57:56,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:57:56,733 INFO L87 Difference]: Start difference. First operand 114 states and 243 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:57,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:57,185 INFO L93 Difference]: Finished difference Result 151 states and 307 transitions. [2021-06-05 21:57:57,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:57:57,187 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:57,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:57,187 INFO L225 Difference]: With dead ends: 151 [2021-06-05 21:57:57,187 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 21:57:57,187 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 432.6ms TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:57:57,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 21:57:57,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 114. [2021-06-05 21:57:57,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.150442477876106) internal successors, (243), 113 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:57,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 243 transitions. [2021-06-05 21:57:57,188 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 243 transitions. Word has length 19 [2021-06-05 21:57:57,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:57,188 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 243 transitions. [2021-06-05 21:57:57,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:57,188 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 243 transitions. [2021-06-05 21:57:57,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:57,189 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:57,189 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:57,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 535 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2870 [2021-06-05 21:57:57,389 INFO L430 AbstractCegarLoop]: === Iteration 541 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:57,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:57,389 INFO L82 PathProgramCache]: Analyzing trace with hash 444899022, now seen corresponding path program 535 times [2021-06-05 21:57:57,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:57,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336509800] [2021-06-05 21:57:57,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:57,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:57,472 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:57,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:57,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336509800] [2021-06-05 21:57:57,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336509800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:57,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190837751] [2021-06-05 21:57:57,472 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:57,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:57,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:57:57,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:57,648 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:57,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190837751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:57,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:57,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 21:57:57,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152832547] [2021-06-05 21:57:57,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:57:57,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:57,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:57:57,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:57:57,649 INFO L87 Difference]: Start difference. First operand 114 states and 243 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:58,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:58,042 INFO L93 Difference]: Finished difference Result 194 states and 391 transitions. [2021-06-05 21:57:58,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:57:58,043 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:58,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:58,043 INFO L225 Difference]: With dead ends: 194 [2021-06-05 21:57:58,043 INFO L226 Difference]: Without dead ends: 194 [2021-06-05 21:57:58,043 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 372.0ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:57:58,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-06-05 21:57:58,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 116. [2021-06-05 21:57:58,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.1826086956521737) internal successors, (251), 115 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:58,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 251 transitions. [2021-06-05 21:57:58,044 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 251 transitions. Word has length 19 [2021-06-05 21:57:58,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:58,044 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 251 transitions. [2021-06-05 21:57:58,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:58,044 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 251 transitions. [2021-06-05 21:57:58,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:58,045 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:58,045 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:58,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 536 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2877 [2021-06-05 21:57:58,245 INFO L430 AbstractCegarLoop]: === Iteration 542 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:58,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:58,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1788152972, now seen corresponding path program 536 times [2021-06-05 21:57:58,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:58,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058991171] [2021-06-05 21:57:58,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:58,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:58,327 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:58,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:58,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058991171] [2021-06-05 21:57:58,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058991171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:58,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389552269] [2021-06-05 21:57:58,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:58,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:57:58,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:58,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:57:58,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:58,494 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:58,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389552269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:58,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:58,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 21:57:58,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480728888] [2021-06-05 21:57:58,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:57:58,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:58,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:57:58,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:57:58,495 INFO L87 Difference]: Start difference. First operand 116 states and 251 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:58,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:58,871 INFO L93 Difference]: Finished difference Result 129 states and 271 transitions. [2021-06-05 21:57:58,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:57:58,871 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:58,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:58,871 INFO L225 Difference]: With dead ends: 129 [2021-06-05 21:57:58,871 INFO L226 Difference]: Without dead ends: 125 [2021-06-05 21:57:58,871 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 398.2ms TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:57:58,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-06-05 21:57:58,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 116. [2021-06-05 21:57:58,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.1739130434782608) internal successors, (250), 115 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:58,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 250 transitions. [2021-06-05 21:57:58,872 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 250 transitions. Word has length 19 [2021-06-05 21:57:58,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:58,873 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 250 transitions. [2021-06-05 21:57:58,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:58,873 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 250 transitions. [2021-06-05 21:57:58,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:58,873 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:58,873 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:59,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2889,537 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:59,073 INFO L430 AbstractCegarLoop]: === Iteration 543 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:59,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:59,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1701271738, now seen corresponding path program 537 times [2021-06-05 21:57:59,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:59,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178169428] [2021-06-05 21:57:59,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:59,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:59,151 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:59,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:59,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178169428] [2021-06-05 21:57:59,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178169428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:59,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846403626] [2021-06-05 21:57:59,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:57:59,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:57:59,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:57:59,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:57:59,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:57:59,299 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:59,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846403626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:59,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:57:59,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 21:57:59,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999846826] [2021-06-05 21:57:59,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:57:59,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:57:59,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:57:59,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:57:59,300 INFO L87 Difference]: Start difference. First operand 116 states and 250 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:59,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:57:59,701 INFO L93 Difference]: Finished difference Result 167 states and 348 transitions. [2021-06-05 21:57:59,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:57:59,702 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:57:59,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:57:59,702 INFO L225 Difference]: With dead ends: 167 [2021-06-05 21:57:59,702 INFO L226 Difference]: Without dead ends: 167 [2021-06-05 21:57:59,702 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 347.2ms TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:57:59,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-05 21:57:59,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 115. [2021-06-05 21:57:59,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.175438596491228) internal successors, (248), 114 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:59,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 248 transitions. [2021-06-05 21:57:59,703 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 248 transitions. Word has length 19 [2021-06-05 21:57:59,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:57:59,703 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 248 transitions. [2021-06-05 21:57:59,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:57:59,704 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 248 transitions. [2021-06-05 21:57:59,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:57:59,704 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:57:59,704 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:57:59,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 538 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2894 [2021-06-05 21:57:59,913 INFO L430 AbstractCegarLoop]: === Iteration 544 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:57:59,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:57:59,913 INFO L82 PathProgramCache]: Analyzing trace with hash 2000468058, now seen corresponding path program 538 times [2021-06-05 21:57:59,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:57:59,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898374166] [2021-06-05 21:57:59,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:57:59,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:57:59,995 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:57:59,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:57:59,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898374166] [2021-06-05 21:57:59,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898374166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:57:59,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392808043] [2021-06-05 21:57:59,995 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:00,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:58:00,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:00,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:58:00,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:00,140 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:00,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392808043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:00,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:00,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 21:58:00,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026939590] [2021-06-05 21:58:00,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:58:00,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:00,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:58:00,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:58:00,141 INFO L87 Difference]: Start difference. First operand 115 states and 248 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:00,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:00,448 INFO L93 Difference]: Finished difference Result 125 states and 263 transitions. [2021-06-05 21:58:00,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:58:00,448 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:00,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:00,448 INFO L225 Difference]: With dead ends: 125 [2021-06-05 21:58:00,448 INFO L226 Difference]: Without dead ends: 119 [2021-06-05 21:58:00,448 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 315.0ms TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:58:00,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-05 21:58:00,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2021-06-05 21:58:00,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.1666666666666665) internal successors, (247), 114 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:00,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 247 transitions. [2021-06-05 21:58:00,449 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 247 transitions. Word has length 19 [2021-06-05 21:58:00,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:00,449 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 247 transitions. [2021-06-05 21:58:00,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:00,450 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 247 transitions. [2021-06-05 21:58:00,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:00,450 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:00,450 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:00,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2898,539 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:00,665 INFO L430 AbstractCegarLoop]: === Iteration 545 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:00,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:00,665 INFO L82 PathProgramCache]: Analyzing trace with hash 486911438, now seen corresponding path program 539 times [2021-06-05 21:58:00,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:00,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023608246] [2021-06-05 21:58:00,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:00,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:00,736 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:00,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:00,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023608246] [2021-06-05 21:58:00,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023608246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:00,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411577936] [2021-06-05 21:58:00,737 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:00,761 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:58:00,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:00,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:58:00,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:00,870 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:00,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411577936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:00,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:00,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 21:58:00,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232111542] [2021-06-05 21:58:00,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:58:00,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:00,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:58:00,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:58:00,871 INFO L87 Difference]: Start difference. First operand 115 states and 247 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:01,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:01,097 INFO L93 Difference]: Finished difference Result 146 states and 305 transitions. [2021-06-05 21:58:01,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:58:01,097 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:01,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:01,097 INFO L225 Difference]: With dead ends: 146 [2021-06-05 21:58:01,097 INFO L226 Difference]: Without dead ends: 146 [2021-06-05 21:58:01,097 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 170.9ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:58:01,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-05 21:58:01,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 110. [2021-06-05 21:58:01,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.1376146788990824) internal successors, (233), 109 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:01,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 233 transitions. [2021-06-05 21:58:01,098 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 233 transitions. Word has length 19 [2021-06-05 21:58:01,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:01,098 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 233 transitions. [2021-06-05 21:58:01,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:01,098 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 233 transitions. [2021-06-05 21:58:01,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:01,099 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:01,099 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:01,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2903,540 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:01,299 INFO L430 AbstractCegarLoop]: === Iteration 546 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:01,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:01,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1913738142, now seen corresponding path program 540 times [2021-06-05 21:58:01,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:01,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682976976] [2021-06-05 21:58:01,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:01,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:01,374 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:01,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:01,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682976976] [2021-06-05 21:58:01,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682976976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:01,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640932788] [2021-06-05 21:58:01,374 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:01,399 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:58:01,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:01,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:58:01,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:01,566 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:01,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640932788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:01,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:01,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 21:58:01,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484234193] [2021-06-05 21:58:01,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:58:01,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:01,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:58:01,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:58:01,567 INFO L87 Difference]: Start difference. First operand 110 states and 233 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:01,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:01,799 INFO L93 Difference]: Finished difference Result 145 states and 289 transitions. [2021-06-05 21:58:01,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:58:01,799 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:01,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:01,799 INFO L225 Difference]: With dead ends: 145 [2021-06-05 21:58:01,799 INFO L226 Difference]: Without dead ends: 142 [2021-06-05 21:58:01,799 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 207.7ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:58:01,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-06-05 21:58:01,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 117. [2021-06-05 21:58:01,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.1551724137931036) internal successors, (250), 116 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:01,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 250 transitions. [2021-06-05 21:58:01,800 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 250 transitions. Word has length 19 [2021-06-05 21:58:01,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:01,801 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 250 transitions. [2021-06-05 21:58:01,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:01,801 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 250 transitions. [2021-06-05 21:58:01,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:01,801 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:01,801 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:02,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2907,541 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:02,001 INFO L430 AbstractCegarLoop]: === Iteration 547 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:02,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:02,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1955091652, now seen corresponding path program 541 times [2021-06-05 21:58:02,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:02,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490183710] [2021-06-05 21:58:02,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:02,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:02,097 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:02,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:02,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490183710] [2021-06-05 21:58:02,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490183710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:02,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797247770] [2021-06-05 21:58:02,097 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:02,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:02,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:58:02,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:02,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:02,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:02,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:58:02,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:02,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:02,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:58:02,269 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:02,305 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-06-05 21:58:02,306 INFO L518 ElimStorePlain]: Eliminatee v_prenex_438 vanished before elimination [2021-06-05 21:58:02,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 21:58:02,308 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:02,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:02,320 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:58:02,321 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:58:02,321 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 21:58:02,362 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:02,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797247770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:02,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:02,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:58:02,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532195670] [2021-06-05 21:58:02,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:58:02,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:02,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:58:02,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:58:02,363 INFO L87 Difference]: Start difference. First operand 117 states and 250 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:02,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:02,770 INFO L93 Difference]: Finished difference Result 143 states and 286 transitions. [2021-06-05 21:58:02,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:58:02,770 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:02,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:02,770 INFO L225 Difference]: With dead ends: 143 [2021-06-05 21:58:02,770 INFO L226 Difference]: Without dead ends: 143 [2021-06-05 21:58:02,770 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 411.6ms TimeCoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:58:02,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-06-05 21:58:02,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 113. [2021-06-05 21:58:02,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0892857142857144) internal successors, (234), 112 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:02,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 234 transitions. [2021-06-05 21:58:02,772 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 234 transitions. Word has length 19 [2021-06-05 21:58:02,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:02,772 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 234 transitions. [2021-06-05 21:58:02,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:02,772 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 234 transitions. [2021-06-05 21:58:02,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:02,772 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:02,772 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:02,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2920,542 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:02,972 INFO L430 AbstractCegarLoop]: === Iteration 548 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:02,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:02,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1245043882, now seen corresponding path program 542 times [2021-06-05 21:58:02,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:02,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944549148] [2021-06-05 21:58:02,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:02,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:03,049 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:03,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:03,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944549148] [2021-06-05 21:58:03,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944549148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:03,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309906272] [2021-06-05 21:58:03,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:03,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:58:03,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:03,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:58:03,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:03,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:03,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:03,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:58:03,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:03,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:03,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:58:03,224 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:03,269 INFO L628 ElimStorePlain]: treesize reduction 70, result has 41.2 percent of original size [2021-06-05 21:58:03,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:03,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 21:58:03,273 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:58:03,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:03,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 21:58:03,293 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:03,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:03,307 INFO L518 ElimStorePlain]: Eliminatee v_prenex_441 vanished before elimination [2021-06-05 21:58:03,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:58:03,309 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-06-05 21:58:03,350 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:03,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309906272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:03,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:03,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:58:03,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982866922] [2021-06-05 21:58:03,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:58:03,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:03,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:58:03,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:58:03,351 INFO L87 Difference]: Start difference. First operand 113 states and 234 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:03,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:03,594 INFO L93 Difference]: Finished difference Result 144 states and 282 transitions. [2021-06-05 21:58:03,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:58:03,594 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:03,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:03,594 INFO L225 Difference]: With dead ends: 144 [2021-06-05 21:58:03,594 INFO L226 Difference]: Without dead ends: 144 [2021-06-05 21:58:03,594 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 230.7ms TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:58:03,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-06-05 21:58:03,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 112. [2021-06-05 21:58:03,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.09009009009009) internal successors, (232), 111 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:03,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 232 transitions. [2021-06-05 21:58:03,595 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 232 transitions. Word has length 19 [2021-06-05 21:58:03,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:03,596 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 232 transitions. [2021-06-05 21:58:03,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:03,596 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 232 transitions. [2021-06-05 21:58:03,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:03,596 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:03,596 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:03,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2927,543 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:03,796 INFO L430 AbstractCegarLoop]: === Iteration 549 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:03,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:03,796 INFO L82 PathProgramCache]: Analyzing trace with hash 816871420, now seen corresponding path program 543 times [2021-06-05 21:58:03,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:03,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502376169] [2021-06-05 21:58:03,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:03,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:03,903 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:03,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:03,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502376169] [2021-06-05 21:58:03,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502376169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:03,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787311471] [2021-06-05 21:58:03,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:03,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:58:03,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:03,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:58:03,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:04,089 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:04,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787311471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:04,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:04,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 21:58:04,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363179363] [2021-06-05 21:58:04,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:58:04,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:04,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:58:04,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:58:04,090 INFO L87 Difference]: Start difference. First operand 112 states and 232 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:04,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:04,513 INFO L93 Difference]: Finished difference Result 122 states and 245 transitions. [2021-06-05 21:58:04,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:58:04,513 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:04,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:04,513 INFO L225 Difference]: With dead ends: 122 [2021-06-05 21:58:04,513 INFO L226 Difference]: Without dead ends: 118 [2021-06-05 21:58:04,513 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 437.9ms TimeCoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:58:04,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-06-05 21:58:04,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 112. [2021-06-05 21:58:04,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.081081081081081) internal successors, (231), 111 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:04,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 231 transitions. [2021-06-05 21:58:04,514 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 231 transitions. Word has length 19 [2021-06-05 21:58:04,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:04,515 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 231 transitions. [2021-06-05 21:58:04,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:04,515 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 231 transitions. [2021-06-05 21:58:04,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:04,515 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:04,515 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:04,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2931,544 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:04,715 INFO L430 AbstractCegarLoop]: === Iteration 550 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:04,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:04,715 INFO L82 PathProgramCache]: Analyzing trace with hash 903752654, now seen corresponding path program 544 times [2021-06-05 21:58:04,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:04,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351557853] [2021-06-05 21:58:04,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:04,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:04,794 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:04,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:04,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351557853] [2021-06-05 21:58:04,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351557853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:04,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40462004] [2021-06-05 21:58:04,794 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:04,819 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:58:04,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:04,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:58:04,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:04,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:04,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:04,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:58:04,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:04,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:04,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:58:04,957 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:04,975 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 21:58:04,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:04,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 21:58:04,978 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:58:04,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:04,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:58:04,984 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 21:58:05,003 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:05,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40462004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:05,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:05,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:58:05,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391679742] [2021-06-05 21:58:05,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:58:05,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:05,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:58:05,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:58:05,004 INFO L87 Difference]: Start difference. First operand 112 states and 231 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:05,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:05,154 INFO L93 Difference]: Finished difference Result 136 states and 273 transitions. [2021-06-05 21:58:05,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:58:05,154 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:05,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:05,154 INFO L225 Difference]: With dead ends: 136 [2021-06-05 21:58:05,154 INFO L226 Difference]: Without dead ends: 136 [2021-06-05 21:58:05,154 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 178.1ms TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:58:05,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-06-05 21:58:05,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 111. [2021-06-05 21:58:05,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.081818181818182) internal successors, (229), 110 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:05,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 229 transitions. [2021-06-05 21:58:05,155 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 229 transitions. Word has length 19 [2021-06-05 21:58:05,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:05,156 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 229 transitions. [2021-06-05 21:58:05,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:05,156 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 229 transitions. [2021-06-05 21:58:05,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:05,156 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:05,156 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:05,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 545 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2937 [2021-06-05 21:58:05,356 INFO L430 AbstractCegarLoop]: === Iteration 551 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:05,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:05,356 INFO L82 PathProgramCache]: Analyzing trace with hash 310525154, now seen corresponding path program 545 times [2021-06-05 21:58:05,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:05,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61029715] [2021-06-05 21:58:05,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:05,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:05,461 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:05,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:05,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61029715] [2021-06-05 21:58:05,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61029715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:05,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062078106] [2021-06-05 21:58:05,461 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:05,486 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:58:05,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:05,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:58:05,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:05,640 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:05,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062078106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:05,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:05,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 21:58:05,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875192977] [2021-06-05 21:58:05,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:58:05,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:05,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:58:05,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:58:05,641 INFO L87 Difference]: Start difference. First operand 111 states and 229 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:05,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:05,997 INFO L93 Difference]: Finished difference Result 121 states and 242 transitions. [2021-06-05 21:58:05,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:58:05,998 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:05,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:05,998 INFO L225 Difference]: With dead ends: 121 [2021-06-05 21:58:05,998 INFO L226 Difference]: Without dead ends: 115 [2021-06-05 21:58:05,998 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 390.8ms TimeCoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:58:05,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-06-05 21:58:05,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2021-06-05 21:58:05,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0727272727272728) internal successors, (228), 110 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:05,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 228 transitions. [2021-06-05 21:58:05,999 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 228 transitions. Word has length 19 [2021-06-05 21:58:05,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:05,999 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 228 transitions. [2021-06-05 21:58:05,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:05,999 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 228 transitions. [2021-06-05 21:58:05,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:05,999 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:05,999 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:06,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2939,546 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:06,200 INFO L430 AbstractCegarLoop]: === Iteration 552 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:06,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:06,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1203031466, now seen corresponding path program 546 times [2021-06-05 21:58:06,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:06,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133479324] [2021-06-05 21:58:06,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:06,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:06,280 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:06,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:06,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133479324] [2021-06-05 21:58:06,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133479324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:06,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650780867] [2021-06-05 21:58:06,280 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:06,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:58:06,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:06,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:58:06,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:06,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:06,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:06,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:58:06,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:06,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:06,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:58:06,432 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:06,449 INFO L628 ElimStorePlain]: treesize reduction 34, result has 30.6 percent of original size [2021-06-05 21:58:06,450 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:58:06,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:58:06,450 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 21:58:06,469 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:06,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650780867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:06,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:06,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:58:06,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336935404] [2021-06-05 21:58:06,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:58:06,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:06,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:58:06,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:58:06,470 INFO L87 Difference]: Start difference. First operand 111 states and 228 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:06,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:06,631 INFO L93 Difference]: Finished difference Result 143 states and 288 transitions. [2021-06-05 21:58:06,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:58:06,631 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:06,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:06,632 INFO L225 Difference]: With dead ends: 143 [2021-06-05 21:58:06,632 INFO L226 Difference]: Without dead ends: 143 [2021-06-05 21:58:06,632 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 167.9ms TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:58:06,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-06-05 21:58:06,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 110. [2021-06-05 21:58:06,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.073394495412844) internal successors, (226), 109 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:06,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 226 transitions. [2021-06-05 21:58:06,633 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 226 transitions. Word has length 19 [2021-06-05 21:58:06,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:06,633 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 226 transitions. [2021-06-05 21:58:06,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:06,633 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 226 transitions. [2021-06-05 21:58:06,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:06,633 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:06,633 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:06,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2944,547 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:06,834 INFO L430 AbstractCegarLoop]: === Iteration 553 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:06,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:06,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1793660092, now seen corresponding path program 547 times [2021-06-05 21:58:06,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:06,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755224787] [2021-06-05 21:58:06,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:06,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:06,911 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:06,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:06,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755224787] [2021-06-05 21:58:06,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755224787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:06,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171077894] [2021-06-05 21:58:06,911 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:06,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:06,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:58:06,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:07,073 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:07,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171077894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:07,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:07,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 21:58:07,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453115413] [2021-06-05 21:58:07,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:58:07,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:07,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:58:07,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:58:07,074 INFO L87 Difference]: Start difference. First operand 110 states and 226 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:07,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:07,294 INFO L93 Difference]: Finished difference Result 118 states and 236 transitions. [2021-06-05 21:58:07,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:58:07,295 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:07,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:07,295 INFO L225 Difference]: With dead ends: 118 [2021-06-05 21:58:07,295 INFO L226 Difference]: Without dead ends: 110 [2021-06-05 21:58:07,295 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 257.5ms TimeCoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:58:07,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-06-05 21:58:07,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-06-05 21:58:07,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.0642201834862384) internal successors, (225), 109 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:07,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 225 transitions. [2021-06-05 21:58:07,296 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 225 transitions. Word has length 19 [2021-06-05 21:58:07,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:07,296 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 225 transitions. [2021-06-05 21:58:07,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:07,296 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 225 transitions. [2021-06-05 21:58:07,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:07,296 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:07,296 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:07,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 548 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2946 [2021-06-05 21:58:07,497 INFO L430 AbstractCegarLoop]: === Iteration 554 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:07,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:07,497 INFO L82 PathProgramCache]: Analyzing trace with hash -2088829746, now seen corresponding path program 548 times [2021-06-05 21:58:07,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:07,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340362361] [2021-06-05 21:58:07,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:07,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:07,569 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:07,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:07,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340362361] [2021-06-05 21:58:07,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340362361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:07,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925321643] [2021-06-05 21:58:07,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:07,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:58:07,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:07,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:58:07,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:07,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:07,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:07,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:58:07,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:07,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:07,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:58:07,706 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:07,724 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 21:58:07,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:07,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 21:58:07,727 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:58:07,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:07,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:58:07,733 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 21:58:07,751 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:07,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925321643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:07,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:07,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:58:07,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910043070] [2021-06-05 21:58:07,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:58:07,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:07,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:58:07,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:58:07,752 INFO L87 Difference]: Start difference. First operand 110 states and 225 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:07,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:07,897 INFO L93 Difference]: Finished difference Result 124 states and 249 transitions. [2021-06-05 21:58:07,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:58:07,898 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:07,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:07,898 INFO L225 Difference]: With dead ends: 124 [2021-06-05 21:58:07,898 INFO L226 Difference]: Without dead ends: 124 [2021-06-05 21:58:07,898 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 151.1ms TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:58:07,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-06-05 21:58:07,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 101. [2021-06-05 21:58:07,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.03) internal successors, (203), 100 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:07,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 203 transitions. [2021-06-05 21:58:07,899 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 203 transitions. Word has length 19 [2021-06-05 21:58:07,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:07,899 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 203 transitions. [2021-06-05 21:58:07,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:07,899 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 203 transitions. [2021-06-05 21:58:07,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:07,899 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:07,899 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:08,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2951,549 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:08,100 INFO L430 AbstractCegarLoop]: === Iteration 555 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:08,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:08,100 INFO L82 PathProgramCache]: Analyzing trace with hash 640804434, now seen corresponding path program 549 times [2021-06-05 21:58:08,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:08,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665125359] [2021-06-05 21:58:08,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:08,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:08,220 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:08,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:08,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665125359] [2021-06-05 21:58:08,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665125359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:08,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643436166] [2021-06-05 21:58:08,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:08,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:58:08,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:08,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:58:08,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:08,442 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:08,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643436166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:08,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:08,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 21:58:08,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109521714] [2021-06-05 21:58:08,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:58:08,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:08,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:58:08,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:58:08,443 INFO L87 Difference]: Start difference. First operand 101 states and 203 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:08,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:08,718 INFO L93 Difference]: Finished difference Result 155 states and 295 transitions. [2021-06-05 21:58:08,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:58:08,719 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:08,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:08,719 INFO L225 Difference]: With dead ends: 155 [2021-06-05 21:58:08,719 INFO L226 Difference]: Without dead ends: 152 [2021-06-05 21:58:08,719 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 325.9ms TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:58:08,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-06-05 21:58:08,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 109. [2021-06-05 21:58:08,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.074074074074074) internal successors, (224), 108 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:08,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 224 transitions. [2021-06-05 21:58:08,720 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 224 transitions. Word has length 19 [2021-06-05 21:58:08,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:08,720 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 224 transitions. [2021-06-05 21:58:08,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:08,720 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 224 transitions. [2021-06-05 21:58:08,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:08,720 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:08,720 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:08,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 550 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2953 [2021-06-05 21:58:08,924 INFO L430 AbstractCegarLoop]: === Iteration 556 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:08,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:08,924 INFO L82 PathProgramCache]: Analyzing trace with hash 416872966, now seen corresponding path program 550 times [2021-06-05 21:58:08,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:08,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867667491] [2021-06-05 21:58:08,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:08,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:09,035 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:09,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:09,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867667491] [2021-06-05 21:58:09,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867667491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:09,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070922644] [2021-06-05 21:58:09,035 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:09,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:58:09,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:09,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:58:09,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:09,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:09,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:09,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:58:09,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:09,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:09,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 21:58:09,232 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:09,270 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-06-05 21:58:09,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 21:58:09,273 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:09,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:09,286 INFO L518 ElimStorePlain]: Eliminatee v_prenex_449 vanished before elimination [2021-06-05 21:58:09,286 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:58:09,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:58:09,287 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 21:58:09,328 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:09,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070922644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:09,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:09,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:58:09,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811308574] [2021-06-05 21:58:09,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:58:09,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:09,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:58:09,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:58:09,329 INFO L87 Difference]: Start difference. First operand 109 states and 224 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:09,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:09,906 INFO L93 Difference]: Finished difference Result 135 states and 264 transitions. [2021-06-05 21:58:09,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:58:09,907 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:09,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:09,907 INFO L225 Difference]: With dead ends: 135 [2021-06-05 21:58:09,907 INFO L226 Difference]: Without dead ends: 135 [2021-06-05 21:58:09,907 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 628.7ms TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:58:09,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-06-05 21:58:09,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 109. [2021-06-05 21:58:09,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.074074074074074) internal successors, (224), 108 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:09,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 224 transitions. [2021-06-05 21:58:09,908 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 224 transitions. Word has length 19 [2021-06-05 21:58:09,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:09,908 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 224 transitions. [2021-06-05 21:58:09,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:09,908 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 224 transitions. [2021-06-05 21:58:09,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:09,908 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:09,908 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:10,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2966,551 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:10,109 INFO L430 AbstractCegarLoop]: === Iteration 557 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:10,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:10,109 INFO L82 PathProgramCache]: Analyzing trace with hash -993917866, now seen corresponding path program 551 times [2021-06-05 21:58:10,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:10,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786766548] [2021-06-05 21:58:10,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:10,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:10,210 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:10,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:10,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786766548] [2021-06-05 21:58:10,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786766548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:10,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909145912] [2021-06-05 21:58:10,211 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:10,235 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:58:10,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:10,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:58:10,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:10,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:10,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:10,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 21:58:10,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:10,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:10,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:58:10,420 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:10,458 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-06-05 21:58:10,458 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:58:10,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 21:58:10,461 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:10,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:10,473 INFO L518 ElimStorePlain]: Eliminatee v_prenex_452 vanished before elimination [2021-06-05 21:58:10,474 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:58:10,474 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 21:58:10,510 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:10,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909145912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:10,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:10,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 21:58:10,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368086255] [2021-06-05 21:58:10,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:58:10,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:10,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:58:10,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:58:10,510 INFO L87 Difference]: Start difference. First operand 109 states and 224 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:11,195 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-06-05 21:58:11,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:11,281 INFO L93 Difference]: Finished difference Result 137 states and 265 transitions. [2021-06-05 21:58:11,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:58:11,281 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:11,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:11,281 INFO L225 Difference]: With dead ends: 137 [2021-06-05 21:58:11,281 INFO L226 Difference]: Without dead ends: 135 [2021-06-05 21:58:11,281 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 793.7ms TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:58:11,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-06-05 21:58:11,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 109. [2021-06-05 21:58:11,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.064814814814815) internal successors, (223), 108 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:11,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 223 transitions. [2021-06-05 21:58:11,282 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 223 transitions. Word has length 19 [2021-06-05 21:58:11,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:11,282 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 223 transitions. [2021-06-05 21:58:11,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:11,282 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 223 transitions. [2021-06-05 21:58:11,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:11,283 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:11,283 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:11,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 552 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2973 [2021-06-05 21:58:11,483 INFO L430 AbstractCegarLoop]: === Iteration 558 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:11,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:11,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1776989706, now seen corresponding path program 552 times [2021-06-05 21:58:11,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:11,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110101104] [2021-06-05 21:58:11,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:11,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:11,564 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:11,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:11,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110101104] [2021-06-05 21:58:11,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110101104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:11,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546904246] [2021-06-05 21:58:11,565 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:11,589 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:58:11,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:11,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:58:11,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:11,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:11,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:11,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:58:11,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:11,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:11,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 21:58:11,738 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:11,783 INFO L628 ElimStorePlain]: treesize reduction 72, result has 39.5 percent of original size [2021-06-05 21:58:11,783 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:58:11,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:11,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:58:11,786 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:11,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:11,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:11,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 21:58:11,805 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:58:11,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:11,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:58:11,821 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-06-05 21:58:11,863 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:11,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546904246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:11,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:11,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:58:11,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867041631] [2021-06-05 21:58:11,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:58:11,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:11,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:58:11,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:58:11,863 INFO L87 Difference]: Start difference. First operand 109 states and 223 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:12,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:12,154 INFO L93 Difference]: Finished difference Result 154 states and 291 transitions. [2021-06-05 21:58:12,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:58:12,154 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:12,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:12,155 INFO L225 Difference]: With dead ends: 154 [2021-06-05 21:58:12,155 INFO L226 Difference]: Without dead ends: 154 [2021-06-05 21:58:12,155 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 316.9ms TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:58:12,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-05 21:58:12,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 108. [2021-06-05 21:58:12,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 107 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:12,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 221 transitions. [2021-06-05 21:58:12,156 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 221 transitions. Word has length 19 [2021-06-05 21:58:12,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:12,156 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 221 transitions. [2021-06-05 21:58:12,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:12,156 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 221 transitions. [2021-06-05 21:58:12,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:12,156 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:12,156 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:12,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 553 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2981 [2021-06-05 21:58:12,357 INFO L430 AbstractCegarLoop]: === Iteration 559 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:12,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:12,357 INFO L82 PathProgramCache]: Analyzing trace with hash -456062288, now seen corresponding path program 553 times [2021-06-05 21:58:12,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:12,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326865029] [2021-06-05 21:58:12,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:12,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:12,487 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:12,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:12,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326865029] [2021-06-05 21:58:12,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326865029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:12,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073436767] [2021-06-05 21:58:12,488 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:12,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:12,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:58:12,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:12,691 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:12,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073436767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:12,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:12,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 21:58:12,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866840001] [2021-06-05 21:58:12,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:58:12,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:12,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:58:12,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:58:12,692 INFO L87 Difference]: Start difference. First operand 108 states and 221 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:13,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:13,308 INFO L93 Difference]: Finished difference Result 134 states and 257 transitions. [2021-06-05 21:58:13,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:58:13,308 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:13,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:13,308 INFO L225 Difference]: With dead ends: 134 [2021-06-05 21:58:13,308 INFO L226 Difference]: Without dead ends: 130 [2021-06-05 21:58:13,308 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 652.0ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:58:13,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-06-05 21:58:13,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 108. [2021-06-05 21:58:13,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.05607476635514) internal successors, (220), 107 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:13,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 220 transitions. [2021-06-05 21:58:13,309 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 220 transitions. Word has length 19 [2021-06-05 21:58:13,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:13,310 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 220 transitions. [2021-06-05 21:58:13,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:13,310 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 220 transitions. [2021-06-05 21:58:13,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:13,310 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:13,310 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:13,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 554 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2985 [2021-06-05 21:58:13,510 INFO L430 AbstractCegarLoop]: === Iteration 560 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:13,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:13,510 INFO L82 PathProgramCache]: Analyzing trace with hash -369181054, now seen corresponding path program 554 times [2021-06-05 21:58:13,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:13,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151772762] [2021-06-05 21:58:13,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:13,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:13,592 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:13,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:13,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151772762] [2021-06-05 21:58:13,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151772762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:13,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310506371] [2021-06-05 21:58:13,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:13,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:58:13,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:13,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:58:13,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:13,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:13,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:13,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:58:13,782 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:13,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:13,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:58:13,785 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:13,803 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 21:58:13,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:13,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 21:58:13,806 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:58:13,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:13,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:58:13,812 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 21:58:13,831 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:13,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310506371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:13,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:13,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:58:13,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447660758] [2021-06-05 21:58:13,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:58:13,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:13,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:58:13,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:58:13,831 INFO L87 Difference]: Start difference. First operand 108 states and 220 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:14,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:14,047 INFO L93 Difference]: Finished difference Result 148 states and 285 transitions. [2021-06-05 21:58:14,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:58:14,047 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:14,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:14,047 INFO L225 Difference]: With dead ends: 148 [2021-06-05 21:58:14,047 INFO L226 Difference]: Without dead ends: 148 [2021-06-05 21:58:14,047 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 274.5ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:58:14,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-06-05 21:58:14,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 107. [2021-06-05 21:58:14,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.056603773584906) internal successors, (218), 106 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:14,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 218 transitions. [2021-06-05 21:58:14,048 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 218 transitions. Word has length 19 [2021-06-05 21:58:14,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:14,048 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 218 transitions. [2021-06-05 21:58:14,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:14,049 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 218 transitions. [2021-06-05 21:58:14,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:14,049 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:14,049 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:14,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2990,555 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:14,249 INFO L430 AbstractCegarLoop]: === Iteration 561 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:14,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:14,249 INFO L82 PathProgramCache]: Analyzing trace with hash -962408554, now seen corresponding path program 555 times [2021-06-05 21:58:14,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:14,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547060417] [2021-06-05 21:58:14,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:14,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:14,343 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:14,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:14,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547060417] [2021-06-05 21:58:14,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547060417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:14,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153905178] [2021-06-05 21:58:14,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:14,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:58:14,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:14,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:58:14,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:14,536 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:14,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153905178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:14,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:14,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 21:58:14,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78657396] [2021-06-05 21:58:14,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:58:14,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:14,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:58:14,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:58:14,537 INFO L87 Difference]: Start difference. First operand 107 states and 218 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:15,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:15,052 INFO L93 Difference]: Finished difference Result 135 states and 257 transitions. [2021-06-05 21:58:15,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:58:15,053 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:15,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:15,053 INFO L225 Difference]: With dead ends: 135 [2021-06-05 21:58:15,053 INFO L226 Difference]: Without dead ends: 129 [2021-06-05 21:58:15,053 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 544.2ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:58:15,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-06-05 21:58:15,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 107. [2021-06-05 21:58:15,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.047169811320755) internal successors, (217), 106 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:15,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 217 transitions. [2021-06-05 21:58:15,054 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 217 transitions. Word has length 19 [2021-06-05 21:58:15,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:15,054 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 217 transitions. [2021-06-05 21:58:15,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:15,054 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 217 transitions. [2021-06-05 21:58:15,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:15,054 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:15,054 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:15,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 556 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2992 [2021-06-05 21:58:15,255 INFO L430 AbstractCegarLoop]: === Iteration 562 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:15,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:15,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1819002122, now seen corresponding path program 556 times [2021-06-05 21:58:15,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:15,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920651935] [2021-06-05 21:58:15,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:15,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:15,332 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:15,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:15,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920651935] [2021-06-05 21:58:15,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920651935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:15,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096410808] [2021-06-05 21:58:15,332 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:15,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:58:15,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:15,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:58:15,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:15,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:15,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:15,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:58:15,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:15,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:15,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:58:15,499 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:15,517 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 21:58:15,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:15,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 21:58:15,520 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:58:15,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:15,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:58:15,526 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 21:58:15,544 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:15,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096410808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:15,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:15,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:58:15,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197954006] [2021-06-05 21:58:15,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:58:15,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:15,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:58:15,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:58:15,545 INFO L87 Difference]: Start difference. First operand 107 states and 217 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:15,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:15,769 INFO L93 Difference]: Finished difference Result 157 states and 303 transitions. [2021-06-05 21:58:15,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:58:15,769 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:15,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:15,770 INFO L225 Difference]: With dead ends: 157 [2021-06-05 21:58:15,770 INFO L226 Difference]: Without dead ends: 157 [2021-06-05 21:58:15,770 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 253.2ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:58:15,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-06-05 21:58:15,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 106. [2021-06-05 21:58:15,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.0476190476190474) internal successors, (215), 105 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:15,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 215 transitions. [2021-06-05 21:58:15,771 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 215 transitions. Word has length 19 [2021-06-05 21:58:15,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:15,771 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 215 transitions. [2021-06-05 21:58:15,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:15,771 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 215 transitions. [2021-06-05 21:58:15,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:15,771 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:15,771 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:15,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2997,557 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:15,971 INFO L430 AbstractCegarLoop]: === Iteration 563 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:15,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:15,972 INFO L82 PathProgramCache]: Analyzing trace with hash 520726384, now seen corresponding path program 557 times [2021-06-05 21:58:15,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:15,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302708721] [2021-06-05 21:58:15,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:15,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:16,054 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:16,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:16,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302708721] [2021-06-05 21:58:16,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302708721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:16,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129215649] [2021-06-05 21:58:16,055 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:16,079 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:58:16,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:16,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:58:16,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:16,229 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:16,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129215649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:16,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:16,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 21:58:16,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101891776] [2021-06-05 21:58:16,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:58:16,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:16,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:58:16,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:58:16,230 INFO L87 Difference]: Start difference. First operand 106 states and 215 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:16,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:16,723 INFO L93 Difference]: Finished difference Result 136 states and 257 transitions. [2021-06-05 21:58:16,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:58:16,723 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:16,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:16,723 INFO L225 Difference]: With dead ends: 136 [2021-06-05 21:58:16,723 INFO L226 Difference]: Without dead ends: 128 [2021-06-05 21:58:16,723 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 498.6ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:58:16,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-06-05 21:58:16,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 106. [2021-06-05 21:58:16,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.038095238095238) internal successors, (214), 105 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:16,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 214 transitions. [2021-06-05 21:58:16,724 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 214 transitions. Word has length 19 [2021-06-05 21:58:16,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:16,724 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 214 transitions. [2021-06-05 21:58:16,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:16,724 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 214 transitions. [2021-06-05 21:58:16,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:16,725 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:16,725 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:16,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2999,558 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:16,925 INFO L430 AbstractCegarLoop]: === Iteration 564 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:16,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:16,925 INFO L82 PathProgramCache]: Analyzing trace with hash 933203842, now seen corresponding path program 558 times [2021-06-05 21:58:16,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:16,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980142145] [2021-06-05 21:58:16,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:16,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:16,998 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:16,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:16,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980142145] [2021-06-05 21:58:16,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980142145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:16,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687598474] [2021-06-05 21:58:16,998 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:17,023 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:58:17,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:17,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:58:17,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:17,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:17,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:17,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:58:17,149 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:17,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:17,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 21:58:17,152 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:17,170 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 21:58:17,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:17,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 21:58:17,173 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:58:17,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:17,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:58:17,179 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 21:58:17,198 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:17,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687598474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:17,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:17,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 21:58:17,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944557335] [2021-06-05 21:58:17,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:58:17,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:17,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:58:17,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:58:17,198 INFO L87 Difference]: Start difference. First operand 106 states and 214 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:17,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:17,411 INFO L93 Difference]: Finished difference Result 166 states and 321 transitions. [2021-06-05 21:58:17,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:58:17,412 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:17,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:17,412 INFO L225 Difference]: With dead ends: 166 [2021-06-05 21:58:17,412 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 21:58:17,412 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 238.6ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:58:17,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 21:58:17,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 105. [2021-06-05 21:58:17,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0384615384615383) internal successors, (212), 104 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:17,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 212 transitions. [2021-06-05 21:58:17,413 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 212 transitions. Word has length 19 [2021-06-05 21:58:17,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:17,413 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 212 transitions. [2021-06-05 21:58:17,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:17,413 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 212 transitions. [2021-06-05 21:58:17,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:17,414 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:17,414 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:17,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 559 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3004 [2021-06-05 21:58:17,614 INFO L430 AbstractCegarLoop]: === Iteration 565 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:17,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:17,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1591702246, now seen corresponding path program 559 times [2021-06-05 21:58:17,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:17,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674218549] [2021-06-05 21:58:17,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:17,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:17,692 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:17,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:17,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674218549] [2021-06-05 21:58:17,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674218549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:17,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377689332] [2021-06-05 21:58:17,692 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:17,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:17,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:58:17,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:17,813 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:17,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377689332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:17,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:17,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-05 21:58:17,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94262334] [2021-06-05 21:58:17,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:58:17,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:17,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:58:17,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:58:17,813 INFO L87 Difference]: Start difference. First operand 105 states and 212 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:18,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:18,155 INFO L93 Difference]: Finished difference Result 116 states and 227 transitions. [2021-06-05 21:58:18,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:58:18,155 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:18,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:18,155 INFO L225 Difference]: With dead ends: 116 [2021-06-05 21:58:18,155 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 21:58:18,155 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 382.2ms TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:58:18,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 21:58:18,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2021-06-05 21:58:18,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0392156862745097) internal successors, (208), 102 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:18,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 208 transitions. [2021-06-05 21:58:18,156 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 208 transitions. Word has length 19 [2021-06-05 21:58:18,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:18,156 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 208 transitions. [2021-06-05 21:58:18,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:18,156 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 208 transitions. [2021-06-05 21:58:18,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:58:18,157 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:18,157 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:18,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3006,560 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:18,357 INFO L430 AbstractCegarLoop]: === Iteration 566 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:18,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:18,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1601710514, now seen corresponding path program 560 times [2021-06-05 21:58:18,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:18,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163600781] [2021-06-05 21:58:18,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:18,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:18,431 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:18,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:18,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163600781] [2021-06-05 21:58:18,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163600781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:18,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946967517] [2021-06-05 21:58:18,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:18,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:58:18,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:18,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 21:58:18,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:18,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 21:58:18,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:18,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 21:58:18,553 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:18,566 INFO L628 ElimStorePlain]: treesize reduction 19, result has 38.7 percent of original size [2021-06-05 21:58:18,566 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:58:18,566 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:58:18,567 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:12 [2021-06-05 21:58:18,586 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:18,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946967517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:18,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:18,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 21:58:18,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506621590] [2021-06-05 21:58:18,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:58:18,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:18,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:58:18,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:58:18,586 INFO L87 Difference]: Start difference. First operand 103 states and 208 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:18,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:18,714 INFO L93 Difference]: Finished difference Result 123 states and 243 transitions. [2021-06-05 21:58:18,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:58:18,715 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:58:18,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:18,715 INFO L225 Difference]: With dead ends: 123 [2021-06-05 21:58:18,715 INFO L226 Difference]: Without dead ends: 123 [2021-06-05 21:58:18,715 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 157.1ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:58:18,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-06-05 21:58:18,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 96. [2021-06-05 21:58:18,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.0) internal successors, (190), 95 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:18,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 190 transitions. [2021-06-05 21:58:18,716 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 190 transitions. Word has length 19 [2021-06-05 21:58:18,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:18,716 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 190 transitions. [2021-06-05 21:58:18,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:18,716 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 190 transitions. [2021-06-05 21:58:18,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:18,716 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:18,716 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:18,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 561 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3011 [2021-06-05 21:58:18,917 INFO L430 AbstractCegarLoop]: === Iteration 567 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:18,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:18,917 INFO L82 PathProgramCache]: Analyzing trace with hash 926464630, now seen corresponding path program 561 times [2021-06-05 21:58:18,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:18,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498784559] [2021-06-05 21:58:18,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:18,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:19,100 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:19,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:19,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498784559] [2021-06-05 21:58:19,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498784559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:19,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063676143] [2021-06-05 21:58:19,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:19,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:58:19,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:19,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:58:19,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:19,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-06-05 21:58:19,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:19,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-06-05 21:58:19,286 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:19,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:19,298 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:58:19,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:58:19,299 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:76, output treesize:37 [2021-06-05 21:58:19,387 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:19,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063676143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:19,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:19,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 21:58:19,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288882268] [2021-06-05 21:58:19,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:58:19,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:19,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:58:19,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:58:19,388 INFO L87 Difference]: Start difference. First operand 96 states and 190 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:19,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:19,770 INFO L93 Difference]: Finished difference Result 174 states and 331 transitions. [2021-06-05 21:58:19,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:58:19,770 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:19,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:19,770 INFO L225 Difference]: With dead ends: 174 [2021-06-05 21:58:19,770 INFO L226 Difference]: Without dead ends: 167 [2021-06-05 21:58:19,771 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 555.5ms TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:58:19,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-05 21:58:19,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 106. [2021-06-05 21:58:19,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.9904761904761905) internal successors, (209), 105 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:19,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 209 transitions. [2021-06-05 21:58:19,772 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 209 transitions. Word has length 20 [2021-06-05 21:58:19,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:19,772 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 209 transitions. [2021-06-05 21:58:19,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:19,772 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 209 transitions. [2021-06-05 21:58:19,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:19,772 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:19,772 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:19,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3013,562 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:19,972 INFO L430 AbstractCegarLoop]: === Iteration 568 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:19,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:19,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1503642474, now seen corresponding path program 562 times [2021-06-05 21:58:19,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:19,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701748760] [2021-06-05 21:58:19,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:19,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:20,159 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:20,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:20,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701748760] [2021-06-05 21:58:20,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701748760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:20,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322638442] [2021-06-05 21:58:20,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:20,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:58:20,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:20,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:20,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:20,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:20,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:20,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:58:20,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:20,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:20,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:58:20,397 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:20,418 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-06-05 21:58:20,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:20,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:58:20,421 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:58:20,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:20,429 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:58:20,429 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 21:58:20,474 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:20,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322638442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:20,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:20,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 21:58:20,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006144933] [2021-06-05 21:58:20,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:58:20,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:20,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:58:20,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:58:20,475 INFO L87 Difference]: Start difference. First operand 106 states and 209 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:20,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:20,814 INFO L93 Difference]: Finished difference Result 178 states and 336 transitions. [2021-06-05 21:58:20,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:58:20,814 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:20,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:20,814 INFO L225 Difference]: With dead ends: 178 [2021-06-05 21:58:20,814 INFO L226 Difference]: Without dead ends: 156 [2021-06-05 21:58:20,814 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 502.7ms TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:58:20,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-05 21:58:20,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 107. [2021-06-05 21:58:20,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.990566037735849) internal successors, (211), 106 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:20,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 211 transitions. [2021-06-05 21:58:20,815 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 211 transitions. Word has length 20 [2021-06-05 21:58:20,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:20,816 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 211 transitions. [2021-06-05 21:58:20,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:20,816 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 211 transitions. [2021-06-05 21:58:20,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:20,816 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:20,816 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:21,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 563 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3022 [2021-06-05 21:58:21,016 INFO L430 AbstractCegarLoop]: === Iteration 569 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:21,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:21,017 INFO L82 PathProgramCache]: Analyzing trace with hash 961820850, now seen corresponding path program 563 times [2021-06-05 21:58:21,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:21,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882758983] [2021-06-05 21:58:21,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:21,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:21,220 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:21,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:21,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882758983] [2021-06-05 21:58:21,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882758983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:21,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259487108] [2021-06-05 21:58:21,220 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:21,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:58:21,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:21,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:21,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:21,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:21,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:21,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:58:21,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:21,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:58:21,479 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,501 INFO L628 ElimStorePlain]: treesize reduction 40, result has 43.7 percent of original size [2021-06-05 21:58:21,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:21,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 21:58:21,503 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:21,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:58:21,511 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 21:58:21,550 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:21,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259487108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:21,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:21,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 21:58:21,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196462212] [2021-06-05 21:58:21,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:58:21,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:21,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:58:21,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:58:21,551 INFO L87 Difference]: Start difference. First operand 107 states and 211 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:21,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:21,867 INFO L93 Difference]: Finished difference Result 179 states and 338 transitions. [2021-06-05 21:58:21,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:58:21,867 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:21,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:21,868 INFO L225 Difference]: With dead ends: 179 [2021-06-05 21:58:21,868 INFO L226 Difference]: Without dead ends: 160 [2021-06-05 21:58:21,868 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 499.8ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:58:21,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-06-05 21:58:21,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 108. [2021-06-05 21:58:21,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.9906542056074767) internal successors, (213), 107 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:21,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 213 transitions. [2021-06-05 21:58:21,869 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 213 transitions. Word has length 20 [2021-06-05 21:58:21,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:21,869 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 213 transitions. [2021-06-05 21:58:21,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:21,869 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 213 transitions. [2021-06-05 21:58:21,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:21,869 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:21,869 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:22,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 564 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3025 [2021-06-05 21:58:22,070 INFO L430 AbstractCegarLoop]: === Iteration 570 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:22,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:22,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1914174058, now seen corresponding path program 564 times [2021-06-05 21:58:22,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:22,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698563395] [2021-06-05 21:58:22,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:22,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:22,259 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:22,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:22,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698563395] [2021-06-05 21:58:22,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698563395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:22,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019795838] [2021-06-05 21:58:22,259 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:22,285 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:58:22,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:22,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:58:22,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:22,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:22,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:58:22,537 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:22,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:22,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:22,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 21:58:22,545 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:22,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:22,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:58:22,551 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-06-05 21:58:22,594 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:22,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019795838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:22,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:22,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 21:58:22,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506335226] [2021-06-05 21:58:22,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:58:22,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:22,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:58:22,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:58:22,595 INFO L87 Difference]: Start difference. First operand 108 states and 213 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:22,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:22,879 INFO L93 Difference]: Finished difference Result 180 states and 343 transitions. [2021-06-05 21:58:22,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:58:22,879 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:22,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:22,879 INFO L225 Difference]: With dead ends: 180 [2021-06-05 21:58:22,879 INFO L226 Difference]: Without dead ends: 173 [2021-06-05 21:58:22,879 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 483.9ms TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:58:22,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-06-05 21:58:22,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 109. [2021-06-05 21:58:22,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.0) internal successors, (216), 108 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:22,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 216 transitions. [2021-06-05 21:58:22,880 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 216 transitions. Word has length 20 [2021-06-05 21:58:22,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:22,881 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 216 transitions. [2021-06-05 21:58:22,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:22,881 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 216 transitions. [2021-06-05 21:58:22,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:22,881 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:22,881 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:23,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3028,565 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:23,081 INFO L430 AbstractCegarLoop]: === Iteration 571 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:23,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:23,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1518788174, now seen corresponding path program 565 times [2021-06-05 21:58:23,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:23,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059914749] [2021-06-05 21:58:23,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:23,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:23,265 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:23,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:23,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059914749] [2021-06-05 21:58:23,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059914749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:23,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312174971] [2021-06-05 21:58:23,265 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:23,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:23,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:23,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:23,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:23,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:23,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:58:23,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:23,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:23,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:58:23,563 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:23,584 INFO L628 ElimStorePlain]: treesize reduction 34, result has 47.7 percent of original size [2021-06-05 21:58:23,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:23,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 21:58:23,587 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:23,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:23,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:58:23,594 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 21:58:23,637 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:23,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312174971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:23,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:23,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 21:58:23,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526554822] [2021-06-05 21:58:23,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:58:23,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:23,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:58:23,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:58:23,638 INFO L87 Difference]: Start difference. First operand 109 states and 216 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:24,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:24,044 INFO L93 Difference]: Finished difference Result 200 states and 380 transitions. [2021-06-05 21:58:24,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:58:24,044 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:24,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:24,044 INFO L225 Difference]: With dead ends: 200 [2021-06-05 21:58:24,044 INFO L226 Difference]: Without dead ends: 178 [2021-06-05 21:58:24,044 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 549.0ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:58:24,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-06-05 21:58:24,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 111. [2021-06-05 21:58:24,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0090909090909093) internal successors, (221), 110 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:24,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 221 transitions. [2021-06-05 21:58:24,046 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 221 transitions. Word has length 20 [2021-06-05 21:58:24,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:24,046 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 221 transitions. [2021-06-05 21:58:24,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:24,046 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 221 transitions. [2021-06-05 21:58:24,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:24,046 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:24,046 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:24,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 566 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3032 [2021-06-05 21:58:24,246 INFO L430 AbstractCegarLoop]: === Iteration 572 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:24,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:24,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1079331238, now seen corresponding path program 566 times [2021-06-05 21:58:24,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:24,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051077052] [2021-06-05 21:58:24,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:24,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:24,432 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:24,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:24,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051077052] [2021-06-05 21:58:24,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051077052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:24,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43717749] [2021-06-05 21:58:24,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:24,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:58:24,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:24,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:24,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:24,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:24,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:24,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:58:24,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:24,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:24,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:58:24,643 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:24,664 INFO L628 ElimStorePlain]: treesize reduction 40, result has 38.5 percent of original size [2021-06-05 21:58:24,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:24,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:58:24,668 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:58:24,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:24,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:58:24,675 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 21:58:24,717 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:24,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43717749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:24,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:24,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 21:58:24,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004240079] [2021-06-05 21:58:24,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:58:24,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:24,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:58:24,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:58:24,718 INFO L87 Difference]: Start difference. First operand 111 states and 221 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:24,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:24,946 INFO L93 Difference]: Finished difference Result 153 states and 291 transitions. [2021-06-05 21:58:24,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:58:24,947 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:24,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:24,947 INFO L225 Difference]: With dead ends: 153 [2021-06-05 21:58:24,947 INFO L226 Difference]: Without dead ends: 131 [2021-06-05 21:58:24,947 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 361.8ms TimeCoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:58:24,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-06-05 21:58:24,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 113. [2021-06-05 21:58:24,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0089285714285716) internal successors, (225), 112 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:24,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 225 transitions. [2021-06-05 21:58:24,948 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 225 transitions. Word has length 20 [2021-06-05 21:58:24,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:24,948 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 225 transitions. [2021-06-05 21:58:24,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:24,948 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 225 transitions. [2021-06-05 21:58:24,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:24,948 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:24,948 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:25,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3036,567 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:25,149 INFO L430 AbstractCegarLoop]: === Iteration 573 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:25,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:25,149 INFO L82 PathProgramCache]: Analyzing trace with hash 537509614, now seen corresponding path program 567 times [2021-06-05 21:58:25,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:25,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102547199] [2021-06-05 21:58:25,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:25,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:25,359 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:25,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:25,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102547199] [2021-06-05 21:58:25,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102547199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:25,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657875505] [2021-06-05 21:58:25,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:25,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:58:25,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:25,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:25,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:25,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:25,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:25,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:58:25,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:25,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:25,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:58:25,619 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:25,647 INFO L628 ElimStorePlain]: treesize reduction 40, result has 43.7 percent of original size [2021-06-05 21:58:25,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:25,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 21:58:25,650 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:25,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:25,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:58:25,659 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 21:58:25,706 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:25,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657875505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:25,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:25,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 21:58:25,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135540588] [2021-06-05 21:58:25,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:58:25,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:25,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:58:25,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:58:25,707 INFO L87 Difference]: Start difference. First operand 113 states and 225 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:26,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:26,000 INFO L93 Difference]: Finished difference Result 151 states and 288 transitions. [2021-06-05 21:58:26,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:58:26,000 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:26,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:26,000 INFO L225 Difference]: With dead ends: 151 [2021-06-05 21:58:26,000 INFO L226 Difference]: Without dead ends: 132 [2021-06-05 21:58:26,000 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 421.8ms TimeCoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:58:26,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-06-05 21:58:26,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 114. [2021-06-05 21:58:26,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.0088495575221237) internal successors, (227), 113 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:26,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 227 transitions. [2021-06-05 21:58:26,002 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 227 transitions. Word has length 20 [2021-06-05 21:58:26,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:26,002 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 227 transitions. [2021-06-05 21:58:26,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:26,002 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 227 transitions. [2021-06-05 21:58:26,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:26,002 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:26,002 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:26,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3039,568 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:26,202 INFO L430 AbstractCegarLoop]: === Iteration 574 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:26,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:26,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1489862822, now seen corresponding path program 568 times [2021-06-05 21:58:26,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:26,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146328349] [2021-06-05 21:58:26,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:26,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:26,405 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:26,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:26,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146328349] [2021-06-05 21:58:26,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146328349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:26,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778611593] [2021-06-05 21:58:26,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:26,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:58:26,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:26,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:26,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:26,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:26,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:26,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:58:26,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:26,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:26,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:58:26,665 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:26,686 INFO L628 ElimStorePlain]: treesize reduction 34, result has 45.2 percent of original size [2021-06-05 21:58:26,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:26,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:58:26,689 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:58:26,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:26,697 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:58:26,697 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 21:58:26,741 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:26,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778611593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:26,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:26,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 21:58:26,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826978892] [2021-06-05 21:58:26,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:58:26,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:26,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:58:26,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:58:26,742 INFO L87 Difference]: Start difference. First operand 114 states and 227 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:27,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:27,006 INFO L93 Difference]: Finished difference Result 149 states and 285 transitions. [2021-06-05 21:58:27,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:58:27,007 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:27,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:27,007 INFO L225 Difference]: With dead ends: 149 [2021-06-05 21:58:27,007 INFO L226 Difference]: Without dead ends: 133 [2021-06-05 21:58:27,007 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 419.8ms TimeCoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:58:27,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-06-05 21:58:27,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 115. [2021-06-05 21:58:27,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.008771929824561) internal successors, (229), 114 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:27,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 229 transitions. [2021-06-05 21:58:27,008 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 229 transitions. Word has length 20 [2021-06-05 21:58:27,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:27,008 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 229 transitions. [2021-06-05 21:58:27,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:27,008 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 229 transitions. [2021-06-05 21:58:27,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:27,008 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:27,008 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:27,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 569 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3043 [2021-06-05 21:58:27,209 INFO L430 AbstractCegarLoop]: === Iteration 575 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:27,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:27,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1943099410, now seen corresponding path program 569 times [2021-06-05 21:58:27,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:27,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423957782] [2021-06-05 21:58:27,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:27,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:27,392 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:27,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:27,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423957782] [2021-06-05 21:58:27,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423957782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:27,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617104087] [2021-06-05 21:58:27,393 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:27,420 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:58:27,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:27,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:27,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:27,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:27,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:27,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:58:27,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:27,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:27,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:58:27,677 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:27,700 INFO L628 ElimStorePlain]: treesize reduction 46, result has 35.2 percent of original size [2021-06-05 21:58:27,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:27,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:58:27,703 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:58:27,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:27,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:58:27,710 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 21:58:27,755 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:27,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617104087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:27,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:27,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 21:58:27,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989758391] [2021-06-05 21:58:27,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:58:27,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:27,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:58:27,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:58:27,756 INFO L87 Difference]: Start difference. First operand 115 states and 229 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:28,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:28,097 INFO L93 Difference]: Finished difference Result 150 states and 291 transitions. [2021-06-05 21:58:28,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:58:28,098 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:28,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:28,098 INFO L225 Difference]: With dead ends: 150 [2021-06-05 21:58:28,098 INFO L226 Difference]: Without dead ends: 137 [2021-06-05 21:58:28,098 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 444.4ms TimeCoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:58:28,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-06-05 21:58:28,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 116. [2021-06-05 21:58:28,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.008695652173913) internal successors, (231), 115 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:28,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 231 transitions. [2021-06-05 21:58:28,099 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 231 transitions. Word has length 20 [2021-06-05 21:58:28,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:28,099 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 231 transitions. [2021-06-05 21:58:28,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:28,099 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 231 transitions. [2021-06-05 21:58:28,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:28,099 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:28,100 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:28,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3046,570 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:28,300 INFO L430 AbstractCegarLoop]: === Iteration 576 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:28,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:28,300 INFO L82 PathProgramCache]: Analyzing trace with hash -806914138, now seen corresponding path program 570 times [2021-06-05 21:58:28,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:28,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437689984] [2021-06-05 21:58:28,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:28,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:28,570 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:28,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:28,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437689984] [2021-06-05 21:58:28,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437689984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:28,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382935138] [2021-06-05 21:58:28,571 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:28,597 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:58:28,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:28,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:28,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:28,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:28,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:28,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:58:28,816 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:28,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:28,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:58:28,820 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:28,881 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-06-05 21:58:28,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:28,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:58:28,885 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:58:28,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:28,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:28,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:58:28,912 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:28,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:28,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:28,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:58:28,938 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:58:28,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:28,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:58:28,960 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 21:58:29,046 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:29,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382935138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:29,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:29,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 21:58:29,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801866299] [2021-06-05 21:58:29,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:58:29,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:29,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:58:29,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:58:29,047 INFO L87 Difference]: Start difference. First operand 116 states and 231 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:29,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:29,537 INFO L93 Difference]: Finished difference Result 169 states and 318 transitions. [2021-06-05 21:58:29,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:58:29,537 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:29,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:29,537 INFO L225 Difference]: With dead ends: 169 [2021-06-05 21:58:29,537 INFO L226 Difference]: Without dead ends: 150 [2021-06-05 21:58:29,537 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 619.7ms TimeCoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:58:29,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-06-05 21:58:29,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 118. [2021-06-05 21:58:29,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.0256410256410255) internal successors, (237), 117 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:29,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 237 transitions. [2021-06-05 21:58:29,539 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 237 transitions. Word has length 20 [2021-06-05 21:58:29,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:29,539 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 237 transitions. [2021-06-05 21:58:29,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:29,539 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 237 transitions. [2021-06-05 21:58:29,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:29,539 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:29,539 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:29,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 571 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3050 [2021-06-05 21:58:29,739 INFO L430 AbstractCegarLoop]: === Iteration 577 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:29,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:29,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1152433290, now seen corresponding path program 571 times [2021-06-05 21:58:29,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:29,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925717074] [2021-06-05 21:58:29,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:29,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:29,915 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:29,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:29,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925717074] [2021-06-05 21:58:29,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925717074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:29,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61223927] [2021-06-05 21:58:29,915 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:29,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:29,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:29,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:30,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:30,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:30,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:58:30,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:30,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:30,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:58:30,120 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:30,143 INFO L628 ElimStorePlain]: treesize reduction 46, result has 35.2 percent of original size [2021-06-05 21:58:30,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:30,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:58:30,147 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:58:30,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:30,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:58:30,154 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 21:58:30,199 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:30,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61223927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:30,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:30,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 21:58:30,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236074401] [2021-06-05 21:58:30,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:58:30,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:30,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:58:30,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:58:30,200 INFO L87 Difference]: Start difference. First operand 118 states and 237 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:30,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:30,482 INFO L93 Difference]: Finished difference Result 159 states and 306 transitions. [2021-06-05 21:58:30,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:58:30,482 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:30,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:30,482 INFO L225 Difference]: With dead ends: 159 [2021-06-05 21:58:30,482 INFO L226 Difference]: Without dead ends: 140 [2021-06-05 21:58:30,482 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 394.4ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:58:30,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-06-05 21:58:30,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 122. [2021-06-05 21:58:30,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.024793388429752) internal successors, (245), 121 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:30,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 245 transitions. [2021-06-05 21:58:30,483 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 245 transitions. Word has length 20 [2021-06-05 21:58:30,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:30,483 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 245 transitions. [2021-06-05 21:58:30,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:30,483 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 245 transitions. [2021-06-05 21:58:30,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:30,484 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:30,484 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:30,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 572 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3055 [2021-06-05 21:58:30,684 INFO L430 AbstractCegarLoop]: === Iteration 578 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:30,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:30,684 INFO L82 PathProgramCache]: Analyzing trace with hash -200080082, now seen corresponding path program 572 times [2021-06-05 21:58:30,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:30,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727964798] [2021-06-05 21:58:30,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:30,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:30,848 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:30,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:30,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727964798] [2021-06-05 21:58:30,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727964798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:30,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802187063] [2021-06-05 21:58:30,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:30,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:58:30,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:30,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:30,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:31,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:31,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:31,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:58:31,071 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:31,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:31,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:58:31,074 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:31,094 INFO L628 ElimStorePlain]: treesize reduction 37, result has 40.3 percent of original size [2021-06-05 21:58:31,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:31,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:58:31,097 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:58:31,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:31,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:58:31,104 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 21:58:31,142 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:31,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802187063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:31,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:31,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 21:58:31,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666210303] [2021-06-05 21:58:31,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:58:31,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:31,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:58:31,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:58:31,143 INFO L87 Difference]: Start difference. First operand 122 states and 245 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:31,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:31,493 INFO L93 Difference]: Finished difference Result 158 states and 305 transitions. [2021-06-05 21:58:31,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:58:31,493 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:31,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:31,493 INFO L225 Difference]: With dead ends: 158 [2021-06-05 21:58:31,493 INFO L226 Difference]: Without dead ends: 142 [2021-06-05 21:58:31,493 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 418.7ms TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:58:31,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-06-05 21:58:31,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 123. [2021-06-05 21:58:31,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.0245901639344264) internal successors, (247), 122 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:31,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 247 transitions. [2021-06-05 21:58:31,495 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 247 transitions. Word has length 20 [2021-06-05 21:58:31,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:31,495 INFO L482 AbstractCegarLoop]: Abstraction has 123 states and 247 transitions. [2021-06-05 21:58:31,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:31,495 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 247 transitions. [2021-06-05 21:58:31,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:31,495 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:31,495 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:31,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3059,573 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:31,695 INFO L430 AbstractCegarLoop]: === Iteration 579 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:31,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:31,695 INFO L82 PathProgramCache]: Analyzing trace with hash 661924982, now seen corresponding path program 573 times [2021-06-05 21:58:31,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:31,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812801875] [2021-06-05 21:58:31,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:31,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:31,901 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:31,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:31,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812801875] [2021-06-05 21:58:31,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812801875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:31,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688029742] [2021-06-05 21:58:31,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:31,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:58:31,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:31,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:31,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:32,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:32,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:32,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:58:32,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:32,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:32,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:58:32,148 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:32,169 INFO L628 ElimStorePlain]: treesize reduction 34, result has 45.2 percent of original size [2021-06-05 21:58:32,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:32,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:58:32,172 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:58:32,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:32,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:58:32,179 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 21:58:32,222 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:32,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688029742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:32,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:32,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 21:58:32,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464665837] [2021-06-05 21:58:32,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:58:32,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:32,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:58:32,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:58:32,223 INFO L87 Difference]: Start difference. First operand 123 states and 247 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:32,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:32,753 INFO L93 Difference]: Finished difference Result 160 states and 313 transitions. [2021-06-05 21:58:32,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:58:32,753 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:32,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:32,754 INFO L225 Difference]: With dead ends: 160 [2021-06-05 21:58:32,754 INFO L226 Difference]: Without dead ends: 147 [2021-06-05 21:58:32,754 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 569.0ms TimeCoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:58:32,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-05 21:58:32,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2021-06-05 21:58:32,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.024390243902439) internal successors, (249), 123 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:32,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 249 transitions. [2021-06-05 21:58:32,755 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 249 transitions. Word has length 20 [2021-06-05 21:58:32,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:32,755 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 249 transitions. [2021-06-05 21:58:32,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:32,755 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 249 transitions. [2021-06-05 21:58:32,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:32,755 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:32,755 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:32,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 574 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3063 [2021-06-05 21:58:32,956 INFO L430 AbstractCegarLoop]: === Iteration 580 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:32,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:32,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1798110254, now seen corresponding path program 574 times [2021-06-05 21:58:32,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:32,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929877500] [2021-06-05 21:58:32,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:32,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:33,144 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:33,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:33,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929877500] [2021-06-05 21:58:33,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929877500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:33,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652891729] [2021-06-05 21:58:33,144 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:33,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:58:33,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:33,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:33,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:33,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:33,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:33,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:58:33,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:33,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:33,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:58:33,355 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:33,416 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-06-05 21:58:33,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:33,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:58:33,421 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:58:33,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:33,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:33,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:58:33,447 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:33,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:33,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:33,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:58:33,473 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:58:33,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:33,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:58:33,494 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 21:58:33,577 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:33,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652891729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:33,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:33,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 21:58:33,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595257751] [2021-06-05 21:58:33,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:58:33,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:33,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:58:33,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:58:33,577 INFO L87 Difference]: Start difference. First operand 124 states and 249 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:34,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:34,033 INFO L93 Difference]: Finished difference Result 180 states and 342 transitions. [2021-06-05 21:58:34,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:58:34,034 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:34,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:34,034 INFO L225 Difference]: With dead ends: 180 [2021-06-05 21:58:34,034 INFO L226 Difference]: Without dead ends: 161 [2021-06-05 21:58:34,034 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 546.6ms TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:58:34,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-06-05 21:58:34,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 121. [2021-06-05 21:58:34,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.025) internal successors, (243), 120 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:34,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 243 transitions. [2021-06-05 21:58:34,035 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 243 transitions. Word has length 20 [2021-06-05 21:58:34,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:34,035 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 243 transitions. [2021-06-05 21:58:34,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:34,035 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 243 transitions. [2021-06-05 21:58:34,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:34,036 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:34,036 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:34,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 575 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3067 [2021-06-05 21:58:34,236 INFO L430 AbstractCegarLoop]: === Iteration 581 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:34,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:34,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1085878362, now seen corresponding path program 575 times [2021-06-05 21:58:34,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:34,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876198774] [2021-06-05 21:58:34,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:34,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:34,398 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:34,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:34,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876198774] [2021-06-05 21:58:34,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876198774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:34,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902244849] [2021-06-05 21:58:34,399 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:34,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:58:34,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:34,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:34,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:34,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:34,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:34,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:58:34,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:34,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:34,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:58:34,596 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:34,618 INFO L628 ElimStorePlain]: treesize reduction 37, result has 43.1 percent of original size [2021-06-05 21:58:34,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:34,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:58:34,622 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:58:34,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:34,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:58:34,629 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 21:58:34,666 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:34,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902244849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:34,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:34,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 21:58:34,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403165963] [2021-06-05 21:58:34,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:58:34,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:34,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:58:34,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:58:34,667 INFO L87 Difference]: Start difference. First operand 121 states and 243 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:35,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:35,067 INFO L93 Difference]: Finished difference Result 163 states and 315 transitions. [2021-06-05 21:58:35,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:58:35,068 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:35,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:35,068 INFO L225 Difference]: With dead ends: 163 [2021-06-05 21:58:35,068 INFO L226 Difference]: Without dead ends: 147 [2021-06-05 21:58:35,068 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 429.4ms TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:58:35,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-05 21:58:35,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 128. [2021-06-05 21:58:35,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.0236220472440944) internal successors, (257), 127 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:35,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 257 transitions. [2021-06-05 21:58:35,069 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 257 transitions. Word has length 20 [2021-06-05 21:58:35,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:35,069 INFO L482 AbstractCegarLoop]: Abstraction has 128 states and 257 transitions. [2021-06-05 21:58:35,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:35,070 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 257 transitions. [2021-06-05 21:58:35,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:35,070 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:35,070 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:35,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 576 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3072 [2021-06-05 21:58:35,270 INFO L430 AbstractCegarLoop]: === Iteration 582 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:35,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:35,270 INFO L82 PathProgramCache]: Analyzing trace with hash -223873298, now seen corresponding path program 576 times [2021-06-05 21:58:35,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:35,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862499575] [2021-06-05 21:58:35,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:35,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:35,458 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:35,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:35,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862499575] [2021-06-05 21:58:35,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862499575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:35,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556768887] [2021-06-05 21:58:35,459 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:35,486 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:58:35,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:35,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:35,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:35,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:35,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:35,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:58:35,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:35,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:35,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:58:35,682 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:35,702 INFO L628 ElimStorePlain]: treesize reduction 37, result has 40.3 percent of original size [2021-06-05 21:58:35,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:35,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:58:35,706 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:58:35,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:35,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:58:35,713 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 21:58:35,755 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:35,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556768887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:35,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:35,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 21:58:35,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240260453] [2021-06-05 21:58:35,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:58:35,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:35,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:58:35,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:58:35,756 INFO L87 Difference]: Start difference. First operand 128 states and 257 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:36,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:36,302 INFO L93 Difference]: Finished difference Result 166 states and 325 transitions. [2021-06-05 21:58:36,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:58:36,302 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:36,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:36,303 INFO L225 Difference]: With dead ends: 166 [2021-06-05 21:58:36,303 INFO L226 Difference]: Without dead ends: 153 [2021-06-05 21:58:36,303 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 576.2ms TimeCoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:58:36,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-06-05 21:58:36,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 129. [2021-06-05 21:58:36,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.0234375) internal successors, (259), 128 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:36,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 259 transitions. [2021-06-05 21:58:36,304 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 259 transitions. Word has length 20 [2021-06-05 21:58:36,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:36,304 INFO L482 AbstractCegarLoop]: Abstraction has 129 states and 259 transitions. [2021-06-05 21:58:36,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:36,304 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 259 transitions. [2021-06-05 21:58:36,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:36,304 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:36,304 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:36,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 577 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3076 [2021-06-05 21:58:36,505 INFO L430 AbstractCegarLoop]: === Iteration 583 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:36,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:36,505 INFO L82 PathProgramCache]: Analyzing trace with hash 912311974, now seen corresponding path program 577 times [2021-06-05 21:58:36,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:36,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249407043] [2021-06-05 21:58:36,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:36,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:36,692 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:36,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:36,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249407043] [2021-06-05 21:58:36,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249407043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:36,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158160918] [2021-06-05 21:58:36,693 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:36,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:36,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:36,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:36,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:36,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:36,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:58:36,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:36,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:36,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:58:36,884 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:36,947 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-06-05 21:58:36,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:36,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:58:36,951 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:58:36,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:36,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:36,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:58:36,978 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:37,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:37,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:37,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:58:37,004 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:58:37,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:37,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:58:37,026 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 21:58:37,108 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:37,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158160918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:37,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:37,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 21:58:37,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238485768] [2021-06-05 21:58:37,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:58:37,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:37,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:58:37,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:58:37,108 INFO L87 Difference]: Start difference. First operand 129 states and 259 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:37,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:37,739 INFO L93 Difference]: Finished difference Result 187 states and 356 transitions. [2021-06-05 21:58:37,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:58:37,740 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:37,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:37,740 INFO L225 Difference]: With dead ends: 187 [2021-06-05 21:58:37,740 INFO L226 Difference]: Without dead ends: 168 [2021-06-05 21:58:37,740 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 618.4ms TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:58:37,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-06-05 21:58:37,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 127. [2021-06-05 21:58:37,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.0238095238095237) internal successors, (255), 126 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:37,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 255 transitions. [2021-06-05 21:58:37,741 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 255 transitions. Word has length 20 [2021-06-05 21:58:37,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:37,741 INFO L482 AbstractCegarLoop]: Abstraction has 127 states and 255 transitions. [2021-06-05 21:58:37,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:37,741 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 255 transitions. [2021-06-05 21:58:37,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:37,741 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:37,742 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:37,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 578 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3080 [2021-06-05 21:58:37,942 INFO L430 AbstractCegarLoop]: === Iteration 584 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:37,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:37,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1964309878, now seen corresponding path program 578 times [2021-06-05 21:58:37,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:37,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690316655] [2021-06-05 21:58:37,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:37,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:38,130 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:38,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:38,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690316655] [2021-06-05 21:58:38,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690316655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:38,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421419046] [2021-06-05 21:58:38,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:38,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:58:38,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:38,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:38,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:38,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:38,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:38,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:58:38,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:38,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:38,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:58:38,321 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:38,343 INFO L628 ElimStorePlain]: treesize reduction 34, result has 47.7 percent of original size [2021-06-05 21:58:38,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:38,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 21:58:38,345 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:38,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:38,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:58:38,353 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 21:58:38,395 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:38,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421419046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:38,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:38,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 21:58:38,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140328202] [2021-06-05 21:58:38,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:58:38,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:38,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:58:38,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:58:38,396 INFO L87 Difference]: Start difference. First operand 127 states and 255 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:38,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:38,952 INFO L93 Difference]: Finished difference Result 171 states and 335 transitions. [2021-06-05 21:58:38,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:58:38,952 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:38,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:38,952 INFO L225 Difference]: With dead ends: 171 [2021-06-05 21:58:38,952 INFO L226 Difference]: Without dead ends: 158 [2021-06-05 21:58:38,952 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 576.1ms TimeCoverageRelationStatistics Valid=108, Invalid=948, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:58:38,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-05 21:58:38,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 135. [2021-06-05 21:58:38,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.0223880597014925) internal successors, (271), 134 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:38,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 271 transitions. [2021-06-05 21:58:38,954 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 271 transitions. Word has length 20 [2021-06-05 21:58:38,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:38,954 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 271 transitions. [2021-06-05 21:58:38,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:38,954 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 271 transitions. [2021-06-05 21:58:38,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:38,954 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:38,954 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:39,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 579 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3085 [2021-06-05 21:58:39,154 INFO L430 AbstractCegarLoop]: === Iteration 585 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:39,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:39,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1194472146, now seen corresponding path program 579 times [2021-06-05 21:58:39,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:39,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579808100] [2021-06-05 21:58:39,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:39,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:39,363 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:39,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:39,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579808100] [2021-06-05 21:58:39,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579808100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:39,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141394169] [2021-06-05 21:58:39,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:39,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:58:39,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:39,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:39,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:39,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:39,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:39,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:58:39,516 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:39,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:39,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:58:39,520 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:39,580 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-06-05 21:58:39,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:39,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:58:39,584 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:58:39,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:39,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:39,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:58:39,613 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:39,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:39,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:39,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:58:39,640 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:58:39,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:39,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:58:39,663 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 21:58:39,748 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:39,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141394169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:39,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:39,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 21:58:39,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423390066] [2021-06-05 21:58:39,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:58:39,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:39,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:58:39,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:58:39,749 INFO L87 Difference]: Start difference. First operand 135 states and 271 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:40,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:40,588 INFO L93 Difference]: Finished difference Result 193 states and 368 transitions. [2021-06-05 21:58:40,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:58:40,589 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:40,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:40,589 INFO L225 Difference]: With dead ends: 193 [2021-06-05 21:58:40,589 INFO L226 Difference]: Without dead ends: 174 [2021-06-05 21:58:40,589 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 812.7ms TimeCoverageRelationStatistics Valid=137, Invalid=1195, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 21:58:40,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-06-05 21:58:40,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 134. [2021-06-05 21:58:40,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.0225563909774436) internal successors, (269), 133 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:40,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 269 transitions. [2021-06-05 21:58:40,590 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 269 transitions. Word has length 20 [2021-06-05 21:58:40,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:40,590 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 269 transitions. [2021-06-05 21:58:40,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:40,590 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 269 transitions. [2021-06-05 21:58:40,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:40,590 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:40,591 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:40,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 580 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3089 [2021-06-05 21:58:40,791 INFO L430 AbstractCegarLoop]: === Iteration 586 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:40,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:40,791 INFO L82 PathProgramCache]: Analyzing trace with hash 954324390, now seen corresponding path program 580 times [2021-06-05 21:58:40,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:40,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273183118] [2021-06-05 21:58:40,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:40,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:41,003 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:41,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:41,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273183118] [2021-06-05 21:58:41,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273183118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:41,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137899045] [2021-06-05 21:58:41,003 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:41,029 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:58:41,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:41,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:41,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:41,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:41,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:41,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:58:41,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:41,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:41,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:41,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:58:41,142 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:41,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:41,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:41,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:58:41,145 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:41,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:41,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:58:41,149 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:41,206 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-06-05 21:58:41,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:41,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:41,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:58:41,210 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:58:41,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:41,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:58:41,214 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:58:41,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:41,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:58:41,238 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 21:58:41,320 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:41,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137899045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:41,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:41,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 21:58:41,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709865746] [2021-06-05 21:58:41,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:58:41,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:41,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:58:41,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:58:41,321 INFO L87 Difference]: Start difference. First operand 134 states and 269 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:42,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:42,179 INFO L93 Difference]: Finished difference Result 202 states and 391 transitions. [2021-06-05 21:58:42,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:58:42,180 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:42,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:42,180 INFO L225 Difference]: With dead ends: 202 [2021-06-05 21:58:42,180 INFO L226 Difference]: Without dead ends: 183 [2021-06-05 21:58:42,180 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 866.8ms TimeCoverageRelationStatistics Valid=139, Invalid=1267, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 21:58:42,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-05 21:58:42,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 136. [2021-06-05 21:58:42,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.0296296296296297) internal successors, (274), 135 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:42,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 274 transitions. [2021-06-05 21:58:42,181 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 274 transitions. Word has length 20 [2021-06-05 21:58:42,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:42,181 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 274 transitions. [2021-06-05 21:58:42,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:42,182 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 274 transitions. [2021-06-05 21:58:42,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:42,182 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:42,182 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:42,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3094,581 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:42,382 INFO L430 AbstractCegarLoop]: === Iteration 587 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:42,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:42,382 INFO L82 PathProgramCache]: Analyzing trace with hash 810584810, now seen corresponding path program 581 times [2021-06-05 21:58:42,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:42,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314171004] [2021-06-05 21:58:42,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:42,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:42,520 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:42,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:42,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314171004] [2021-06-05 21:58:42,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314171004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:42,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17869801] [2021-06-05 21:58:42,521 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:42,547 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:58:42,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:42,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:42,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:42,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:42,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:42,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:58:42,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:42,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:42,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:58:42,741 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:42,762 INFO L628 ElimStorePlain]: treesize reduction 40, result has 38.5 percent of original size [2021-06-05 21:58:42,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:42,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:58:42,766 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:58:42,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:42,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:58:42,773 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 21:58:42,812 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:42,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17869801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:42,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:42,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 21:58:42,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469756442] [2021-06-05 21:58:42,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:58:42,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:42,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:58:42,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:58:42,813 INFO L87 Difference]: Start difference. First operand 136 states and 274 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:43,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:43,198 INFO L93 Difference]: Finished difference Result 170 states and 337 transitions. [2021-06-05 21:58:43,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:58:43,198 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:43,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:43,198 INFO L225 Difference]: With dead ends: 170 [2021-06-05 21:58:43,198 INFO L226 Difference]: Without dead ends: 148 [2021-06-05 21:58:43,198 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 363.2ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:58:43,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-06-05 21:58:43,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 137. [2021-06-05 21:58:43,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.0294117647058822) internal successors, (276), 136 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:43,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 276 transitions. [2021-06-05 21:58:43,199 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 276 transitions. Word has length 20 [2021-06-05 21:58:43,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:43,200 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 276 transitions. [2021-06-05 21:58:43,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:43,200 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 276 transitions. [2021-06-05 21:58:43,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:43,200 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:43,200 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:43,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 582 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3097 [2021-06-05 21:58:43,400 INFO L430 AbstractCegarLoop]: === Iteration 588 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:43,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:43,400 INFO L82 PathProgramCache]: Analyzing trace with hash 268763186, now seen corresponding path program 582 times [2021-06-05 21:58:43,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:43,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006501933] [2021-06-05 21:58:43,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:43,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:43,546 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:43,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:43,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006501933] [2021-06-05 21:58:43,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006501933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:43,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762852120] [2021-06-05 21:58:43,546 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:43,572 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:58:43,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:43,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:58:43,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:43,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:43,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:58:43,787 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:43,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:43,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:43,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 21:58:43,795 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:43,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:43,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:58:43,802 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-06-05 21:58:43,839 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:43,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762852120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:43,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:43,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 21:58:43,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844376212] [2021-06-05 21:58:43,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:58:43,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:43,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:58:43,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:58:43,840 INFO L87 Difference]: Start difference. First operand 137 states and 276 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:44,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:44,183 INFO L93 Difference]: Finished difference Result 167 states and 334 transitions. [2021-06-05 21:58:44,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:58:44,183 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:44,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:44,184 INFO L225 Difference]: With dead ends: 167 [2021-06-05 21:58:44,184 INFO L226 Difference]: Without dead ends: 160 [2021-06-05 21:58:44,184 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 384.3ms TimeCoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:58:44,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-06-05 21:58:44,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 138. [2021-06-05 21:58:44,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.0364963503649633) internal successors, (279), 137 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:44,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 279 transitions. [2021-06-05 21:58:44,185 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 279 transitions. Word has length 20 [2021-06-05 21:58:44,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:44,185 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 279 transitions. [2021-06-05 21:58:44,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:44,185 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 279 transitions. [2021-06-05 21:58:44,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:44,185 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:44,185 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:44,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 583 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3100 [2021-06-05 21:58:44,386 INFO L430 AbstractCegarLoop]: === Iteration 589 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:44,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:44,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1221116394, now seen corresponding path program 583 times [2021-06-05 21:58:44,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:44,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771821026] [2021-06-05 21:58:44,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:44,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:44,669 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:44,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:44,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771821026] [2021-06-05 21:58:44,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771821026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:44,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126136182] [2021-06-05 21:58:44,669 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:44,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:44,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:44,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:44,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:44,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:44,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:58:44,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:44,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:44,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:58:44,943 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:44,964 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-06-05 21:58:44,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:44,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:58:44,968 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:58:44,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:44,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:58:44,975 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 21:58:45,020 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:45,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126136182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:45,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:45,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 21:58:45,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032144204] [2021-06-05 21:58:45,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:58:45,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:45,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:58:45,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:58:45,021 INFO L87 Difference]: Start difference. First operand 138 states and 279 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:45,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:45,329 INFO L93 Difference]: Finished difference Result 164 states and 320 transitions. [2021-06-05 21:58:45,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:58:45,330 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:45,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:45,330 INFO L225 Difference]: With dead ends: 164 [2021-06-05 21:58:45,330 INFO L226 Difference]: Without dead ends: 148 [2021-06-05 21:58:45,330 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 550.4ms TimeCoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:58:45,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-06-05 21:58:45,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 139. [2021-06-05 21:58:45,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.036231884057971) internal successors, (281), 138 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:45,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 281 transitions. [2021-06-05 21:58:45,331 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 281 transitions. Word has length 20 [2021-06-05 21:58:45,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:45,331 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 281 transitions. [2021-06-05 21:58:45,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:45,331 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 281 transitions. [2021-06-05 21:58:45,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:45,332 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:45,332 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:45,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3103,584 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:45,543 INFO L430 AbstractCegarLoop]: === Iteration 590 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:45,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:45,543 INFO L82 PathProgramCache]: Analyzing trace with hash 2083121458, now seen corresponding path program 584 times [2021-06-05 21:58:45,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:45,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808936249] [2021-06-05 21:58:45,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:45,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:45,729 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:45,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:45,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808936249] [2021-06-05 21:58:45,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808936249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:45,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124949257] [2021-06-05 21:58:45,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:45,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:58:45,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:45,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:45,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:46,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:46,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:46,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:58:46,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:46,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:46,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:58:46,016 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:46,039 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-06-05 21:58:46,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:46,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:58:46,042 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:58:46,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:46,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:58:46,050 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 21:58:46,088 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:46,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124949257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:46,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:46,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 21:58:46,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477893316] [2021-06-05 21:58:46,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:58:46,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:46,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:58:46,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:58:46,089 INFO L87 Difference]: Start difference. First operand 139 states and 281 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:46,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:46,382 INFO L93 Difference]: Finished difference Result 166 states and 324 transitions. [2021-06-05 21:58:46,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:58:46,382 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:46,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:46,383 INFO L225 Difference]: With dead ends: 166 [2021-06-05 21:58:46,383 INFO L226 Difference]: Without dead ends: 153 [2021-06-05 21:58:46,383 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 446.3ms TimeCoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:58:46,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-06-05 21:58:46,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 140. [2021-06-05 21:58:46,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.035971223021583) internal successors, (283), 139 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:46,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 283 transitions. [2021-06-05 21:58:46,384 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 283 transitions. Word has length 20 [2021-06-05 21:58:46,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:46,384 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 283 transitions. [2021-06-05 21:58:46,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:46,384 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 283 transitions. [2021-06-05 21:58:46,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:46,384 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:46,384 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:46,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 585 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3107 [2021-06-05 21:58:46,585 INFO L430 AbstractCegarLoop]: === Iteration 591 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:46,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:46,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1075660566, now seen corresponding path program 585 times [2021-06-05 21:58:46,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:46,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834241788] [2021-06-05 21:58:46,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:46,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:46,834 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:46,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:46,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834241788] [2021-06-05 21:58:46,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834241788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:46,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436797425] [2021-06-05 21:58:46,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:46,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:58:46,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:46,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:46,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:47,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:47,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:47,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:58:47,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:47,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:47,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:58:47,101 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:47,162 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-06-05 21:58:47,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:47,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:58:47,166 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:58:47,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:47,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:47,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:58:47,194 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:47,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:47,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:47,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:58:47,220 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:58:47,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:47,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:58:47,243 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 21:58:47,332 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:47,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436797425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:47,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:47,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 21:58:47,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008581201] [2021-06-05 21:58:47,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:58:47,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:47,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:58:47,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:58:47,333 INFO L87 Difference]: Start difference. First operand 140 states and 283 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:47,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:47,855 INFO L93 Difference]: Finished difference Result 192 states and 367 transitions. [2021-06-05 21:58:47,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:58:47,856 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:47,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:47,856 INFO L225 Difference]: With dead ends: 192 [2021-06-05 21:58:47,856 INFO L226 Difference]: Without dead ends: 173 [2021-06-05 21:58:47,856 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 673.1ms TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:58:47,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-06-05 21:58:47,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 138. [2021-06-05 21:58:47,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.0364963503649633) internal successors, (279), 137 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:47,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 279 transitions. [2021-06-05 21:58:47,857 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 279 transitions. Word has length 20 [2021-06-05 21:58:47,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:47,857 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 279 transitions. [2021-06-05 21:58:47,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:47,858 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 279 transitions. [2021-06-05 21:58:47,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:47,858 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:47,858 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:48,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 586 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3110 [2021-06-05 21:58:48,058 INFO L430 AbstractCegarLoop]: === Iteration 592 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:48,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:48,058 INFO L82 PathProgramCache]: Analyzing trace with hash 2025165106, now seen corresponding path program 586 times [2021-06-05 21:58:48,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:48,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789240325] [2021-06-05 21:58:48,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:48,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:48,251 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:48,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:48,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789240325] [2021-06-05 21:58:48,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789240325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:48,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861869066] [2021-06-05 21:58:48,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:48,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:58:48,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:48,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:48,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:48,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:48,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:48,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:58:48,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:48,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:48,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:58:48,468 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:48,490 INFO L628 ElimStorePlain]: treesize reduction 37, result has 43.1 percent of original size [2021-06-05 21:58:48,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:48,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:58:48,494 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:58:48,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:48,501 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:58:48,502 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 21:58:48,541 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:48,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861869066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:48,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:48,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 21:58:48,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590557728] [2021-06-05 21:58:48,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:58:48,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:48,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:58:48,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:58:48,542 INFO L87 Difference]: Start difference. First operand 138 states and 279 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:48,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:48,836 INFO L93 Difference]: Finished difference Result 161 states and 315 transitions. [2021-06-05 21:58:48,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:58:48,836 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:48,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:48,836 INFO L225 Difference]: With dead ends: 161 [2021-06-05 21:58:48,836 INFO L226 Difference]: Without dead ends: 142 [2021-06-05 21:58:48,836 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 384.1ms TimeCoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:58:48,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-06-05 21:58:48,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2021-06-05 21:58:48,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.035971223021583) internal successors, (283), 139 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:48,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 283 transitions. [2021-06-05 21:58:48,837 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 283 transitions. Word has length 20 [2021-06-05 21:58:48,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:48,837 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 283 transitions. [2021-06-05 21:58:48,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:48,838 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 283 transitions. [2021-06-05 21:58:48,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:48,838 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:48,838 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:49,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3115,587 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:49,038 INFO L430 AbstractCegarLoop]: === Iteration 593 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:49,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:49,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1317448982, now seen corresponding path program 587 times [2021-06-05 21:58:49,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:49,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968557071] [2021-06-05 21:58:49,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:49,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:49,207 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:49,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:49,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968557071] [2021-06-05 21:58:49,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968557071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:49,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127125125] [2021-06-05 21:58:49,207 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:49,233 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:58:49,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:49,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:49,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:49,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:49,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:49,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:58:49,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:49,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:49,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:58:49,450 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:49,471 INFO L628 ElimStorePlain]: treesize reduction 40, result has 38.5 percent of original size [2021-06-05 21:58:49,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:49,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:58:49,474 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:58:49,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:49,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:58:49,482 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 21:58:49,525 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:49,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127125125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:49,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:49,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 21:58:49,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827890611] [2021-06-05 21:58:49,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:58:49,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:49,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:58:49,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:58:49,526 INFO L87 Difference]: Start difference. First operand 140 states and 283 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:49,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:49,870 INFO L93 Difference]: Finished difference Result 160 states and 314 transitions. [2021-06-05 21:58:49,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:58:49,870 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:49,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:49,870 INFO L225 Difference]: With dead ends: 160 [2021-06-05 21:58:49,870 INFO L226 Difference]: Without dead ends: 144 [2021-06-05 21:58:49,871 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 459.8ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:58:49,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-06-05 21:58:49,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2021-06-05 21:58:49,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.0357142857142856) internal successors, (285), 140 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:49,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 285 transitions. [2021-06-05 21:58:49,872 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 285 transitions. Word has length 20 [2021-06-05 21:58:49,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:49,872 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 285 transitions. [2021-06-05 21:58:49,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:49,872 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 285 transitions. [2021-06-05 21:58:49,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:49,872 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:49,872 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:50,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3118,588 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:50,073 INFO L430 AbstractCegarLoop]: === Iteration 594 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:50,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:50,073 INFO L82 PathProgramCache]: Analyzing trace with hash -455443918, now seen corresponding path program 588 times [2021-06-05 21:58:50,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:50,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911325467] [2021-06-05 21:58:50,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:50,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:50,249 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:50,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:50,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911325467] [2021-06-05 21:58:50,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911325467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:50,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097328715] [2021-06-05 21:58:50,250 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:50,276 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:58:50,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:50,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:58:50,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:50,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:50,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:58:50,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:50,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:50,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:50,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 21:58:50,521 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:50,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:50,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:58:50,528 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-06-05 21:58:50,571 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:50,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097328715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:50,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:50,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 21:58:50,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555550110] [2021-06-05 21:58:50,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:58:50,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:50,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:58:50,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:58:50,571 INFO L87 Difference]: Start difference. First operand 141 states and 285 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:51,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:51,125 INFO L93 Difference]: Finished difference Result 163 states and 327 transitions. [2021-06-05 21:58:51,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:58:51,125 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:51,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:51,125 INFO L225 Difference]: With dead ends: 163 [2021-06-05 21:58:51,125 INFO L226 Difference]: Without dead ends: 156 [2021-06-05 21:58:51,125 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 549.9ms TimeCoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:58:51,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-05 21:58:51,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 142. [2021-06-05 21:58:51,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.0425531914893615) internal successors, (288), 141 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:51,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 288 transitions. [2021-06-05 21:58:51,127 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 288 transitions. Word has length 20 [2021-06-05 21:58:51,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:51,127 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 288 transitions. [2021-06-05 21:58:51,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:51,127 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 288 transitions. [2021-06-05 21:58:51,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:51,127 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:51,127 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:51,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 589 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3122 [2021-06-05 21:58:51,327 INFO L430 AbstractCegarLoop]: === Iteration 595 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:51,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:51,328 INFO L82 PathProgramCache]: Analyzing trace with hash 680741354, now seen corresponding path program 589 times [2021-06-05 21:58:51,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:51,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937647973] [2021-06-05 21:58:51,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:51,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:51,531 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:51,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:51,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937647973] [2021-06-05 21:58:51,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937647973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:51,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007224631] [2021-06-05 21:58:51,532 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:51,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:51,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:51,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:51,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:51,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:51,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:58:51,757 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:51,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:51,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:58:51,761 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:51,826 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-06-05 21:58:51,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:51,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:58:51,830 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:58:51,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:51,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:51,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:58:51,858 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:51,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:51,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:51,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:58:51,884 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:58:51,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:51,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:58:51,907 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 21:58:51,993 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:51,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007224631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:51,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:51,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 21:58:51,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328286569] [2021-06-05 21:58:51,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:58:51,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:51,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:58:51,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:58:51,994 INFO L87 Difference]: Start difference. First operand 142 states and 288 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:52,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:52,636 INFO L93 Difference]: Finished difference Result 190 states and 366 transitions. [2021-06-05 21:58:52,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:58:52,636 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:52,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:52,636 INFO L225 Difference]: With dead ends: 190 [2021-06-05 21:58:52,636 INFO L226 Difference]: Without dead ends: 171 [2021-06-05 21:58:52,636 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 703.7ms TimeCoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:58:52,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-06-05 21:58:52,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 142. [2021-06-05 21:58:52,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.0425531914893615) internal successors, (288), 141 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:52,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 288 transitions. [2021-06-05 21:58:52,638 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 288 transitions. Word has length 20 [2021-06-05 21:58:52,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:52,638 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 288 transitions. [2021-06-05 21:58:52,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:52,638 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 288 transitions. [2021-06-05 21:58:52,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:52,638 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:52,638 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:52,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 590 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3125 [2021-06-05 21:58:52,854 INFO L430 AbstractCegarLoop]: === Iteration 596 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:52,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:52,854 INFO L82 PathProgramCache]: Analyzing trace with hash 401777130, now seen corresponding path program 590 times [2021-06-05 21:58:52,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:52,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172248529] [2021-06-05 21:58:52,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:52,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:52,992 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:52,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:52,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172248529] [2021-06-05 21:58:52,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172248529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:52,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192652460] [2021-06-05 21:58:52,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:53,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:58:53,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:53,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:53,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:53,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:53,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:53,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:58:53,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:53,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:53,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:58:53,195 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:53,215 INFO L628 ElimStorePlain]: treesize reduction 34, result has 45.2 percent of original size [2021-06-05 21:58:53,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:53,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:58:53,218 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:58:53,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:53,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:58:53,226 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 21:58:53,262 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:53,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192652460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:53,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:53,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 21:58:53,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168887428] [2021-06-05 21:58:53,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:58:53,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:53,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:58:53,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:58:53,263 INFO L87 Difference]: Start difference. First operand 142 states and 288 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:53,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:53,828 INFO L93 Difference]: Finished difference Result 173 states and 345 transitions. [2021-06-05 21:58:53,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:58:53,828 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:53,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:53,829 INFO L225 Difference]: With dead ends: 173 [2021-06-05 21:58:53,829 INFO L226 Difference]: Without dead ends: 157 [2021-06-05 21:58:53,829 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 505.9ms TimeCoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:58:53,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-06-05 21:58:53,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 144. [2021-06-05 21:58:53,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.041958041958042) internal successors, (292), 143 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:53,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 292 transitions. [2021-06-05 21:58:53,830 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 292 transitions. Word has length 20 [2021-06-05 21:58:53,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:53,830 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 292 transitions. [2021-06-05 21:58:53,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:53,830 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 292 transitions. [2021-06-05 21:58:53,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:53,830 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:53,830 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:54,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 591 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3130 [2021-06-05 21:58:54,031 INFO L430 AbstractCegarLoop]: === Iteration 597 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:54,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:54,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1263782194, now seen corresponding path program 591 times [2021-06-05 21:58:54,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:54,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507425672] [2021-06-05 21:58:54,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:54,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:54,196 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:54,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:54,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507425672] [2021-06-05 21:58:54,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507425672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:54,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678770907] [2021-06-05 21:58:54,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:54,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:58:54,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:54,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:54,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:54,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:54,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:54,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:58:54,416 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:54,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:54,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:58:54,419 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:54,441 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-06-05 21:58:54,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:54,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:58:54,444 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:58:54,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:54,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:58:54,451 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 21:58:54,487 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:54,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678770907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:54,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:54,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 21:58:54,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550700924] [2021-06-05 21:58:54,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:58:54,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:54,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:58:54,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:58:54,488 INFO L87 Difference]: Start difference. First operand 144 states and 292 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:54,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:54,892 INFO L93 Difference]: Finished difference Result 164 states and 324 transitions. [2021-06-05 21:58:54,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:58:54,893 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:54,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:54,893 INFO L225 Difference]: With dead ends: 164 [2021-06-05 21:58:54,893 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 21:58:54,893 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 506.3ms TimeCoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:58:54,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 21:58:54,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 145. [2021-06-05 21:58:54,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.0416666666666665) internal successors, (294), 144 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:54,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 294 transitions. [2021-06-05 21:58:54,894 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 294 transitions. Word has length 20 [2021-06-05 21:58:54,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:54,894 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 294 transitions. [2021-06-05 21:58:54,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:54,894 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 294 transitions. [2021-06-05 21:58:54,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:54,895 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:54,895 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:55,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3134,592 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:55,095 INFO L430 AbstractCegarLoop]: === Iteration 598 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:55,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:55,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1894999830, now seen corresponding path program 592 times [2021-06-05 21:58:55,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:55,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173175585] [2021-06-05 21:58:55,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:55,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:55,335 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:55,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:55,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173175585] [2021-06-05 21:58:55,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173175585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:55,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096137818] [2021-06-05 21:58:55,335 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:55,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:58:55,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:55,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:55,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:55,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:55,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:55,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:58:55,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:55,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:55,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:58:55,532 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:55,593 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-06-05 21:58:55,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:55,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:58:55,597 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:58:55,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:55,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:55,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:58:55,625 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:55,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:55,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:55,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:58:55,651 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:58:55,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:55,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:58:55,673 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 21:58:55,758 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:55,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096137818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:55,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:55,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 21:58:55,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427498365] [2021-06-05 21:58:55,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:58:55,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:55,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:58:55,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:58:55,759 INFO L87 Difference]: Start difference. First operand 145 states and 294 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:56,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:56,310 INFO L93 Difference]: Finished difference Result 167 states and 331 transitions. [2021-06-05 21:58:56,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:58:56,310 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:56,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:56,310 INFO L225 Difference]: With dead ends: 167 [2021-06-05 21:58:56,310 INFO L226 Difference]: Without dead ends: 155 [2021-06-05 21:58:56,311 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 687.0ms TimeCoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:58:56,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-06-05 21:58:56,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 146. [2021-06-05 21:58:56,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.0413793103448277) internal successors, (296), 145 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:56,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 296 transitions. [2021-06-05 21:58:56,312 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 296 transitions. Word has length 20 [2021-06-05 21:58:56,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:56,312 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 296 transitions. [2021-06-05 21:58:56,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:56,312 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 296 transitions. [2021-06-05 21:58:56,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:56,312 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:56,312 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:56,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3138,593 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:56,528 INFO L430 AbstractCegarLoop]: === Iteration 599 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:56,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:56,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1728800206, now seen corresponding path program 593 times [2021-06-05 21:58:56,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:56,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117806593] [2021-06-05 21:58:56,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:56,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:56,717 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:56,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:56,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117806593] [2021-06-05 21:58:56,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117806593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:56,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592680361] [2021-06-05 21:58:56,717 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:56,744 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:58:56,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:56,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:56,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:56,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:56,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:56,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:58:56,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:56,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:56,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:58:56,920 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:56,941 INFO L628 ElimStorePlain]: treesize reduction 34, result has 45.2 percent of original size [2021-06-05 21:58:56,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:56,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:58:56,944 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:58:56,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:56,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:58:56,952 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 21:58:56,994 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:56,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592680361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:56,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:56,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 21:58:56,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505052451] [2021-06-05 21:58:56,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:58:56,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:56,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:58:56,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:58:56,995 INFO L87 Difference]: Start difference. First operand 146 states and 296 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:57,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:57,568 INFO L93 Difference]: Finished difference Result 173 states and 345 transitions. [2021-06-05 21:58:57,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:58:57,569 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:57,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:57,569 INFO L225 Difference]: With dead ends: 173 [2021-06-05 21:58:57,569 INFO L226 Difference]: Without dead ends: 160 [2021-06-05 21:58:57,569 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 537.4ms TimeCoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:58:57,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-06-05 21:58:57,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 153. [2021-06-05 21:58:57,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.039473684210526) internal successors, (310), 152 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:57,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 310 transitions. [2021-06-05 21:58:57,570 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 310 transitions. Word has length 20 [2021-06-05 21:58:57,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:57,571 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 310 transitions. [2021-06-05 21:58:57,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:57,571 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 310 transitions. [2021-06-05 21:58:57,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:57,571 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:57,571 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:57,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 594 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3143 [2021-06-05 21:58:57,785 INFO L430 AbstractCegarLoop]: === Iteration 600 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:57,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:57,785 INFO L82 PathProgramCache]: Analyzing trace with hash -592614934, now seen corresponding path program 594 times [2021-06-05 21:58:57,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:57,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124744306] [2021-06-05 21:58:57,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:57,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:58,025 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:58,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:58,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124744306] [2021-06-05 21:58:58,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124744306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:58,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023707001] [2021-06-05 21:58:58,026 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 595 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 595 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:58,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:58:58,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:58:58,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:58,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:58,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:58,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:58,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:58:58,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:58,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:58,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:58:58,196 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:58,258 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-06-05 21:58:58,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:58,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:58:58,262 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:58:58,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:58,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:58,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:58:58,290 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:58,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:58,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:58,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:58:58,317 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:58:58,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:58,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:58:58,340 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 21:58:58,423 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:58,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023707001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:58,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:58,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 21:58:58,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196429976] [2021-06-05 21:58:58,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:58:58,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:58,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:58:58,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:58:58,424 INFO L87 Difference]: Start difference. First operand 153 states and 310 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:59,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:58:59,154 INFO L93 Difference]: Finished difference Result 197 states and 382 transitions. [2021-06-05 21:58:59,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:58:59,154 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:58:59,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:58:59,154 INFO L225 Difference]: With dead ends: 197 [2021-06-05 21:58:59,154 INFO L226 Difference]: Without dead ends: 178 [2021-06-05 21:58:59,155 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 743.6ms TimeCoverageRelationStatistics Valid=130, Invalid=1060, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:58:59,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-06-05 21:58:59,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 152. [2021-06-05 21:58:59,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.0397350993377485) internal successors, (308), 151 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:59,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 308 transitions. [2021-06-05 21:58:59,156 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 308 transitions. Word has length 20 [2021-06-05 21:58:59,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:58:59,156 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 308 transitions. [2021-06-05 21:58:59,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:58:59,156 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 308 transitions. [2021-06-05 21:58:59,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:58:59,156 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:58:59,156 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:58:59,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3146,595 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:59,357 INFO L430 AbstractCegarLoop]: === Iteration 601 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:58:59,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:58:59,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1556181602, now seen corresponding path program 595 times [2021-06-05 21:58:59,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:58:59,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489771271] [2021-06-05 21:58:59,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:58:59,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:59,567 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:59,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:58:59,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489771271] [2021-06-05 21:58:59,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489771271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:59,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905051919] [2021-06-05 21:58:59,568 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:58:59,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:58:59,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:58:59,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:58:59,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:59,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:59,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:58:59,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:59,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:59,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:59,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:58:59,723 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:59,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:59,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:59,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:58:59,727 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:59,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:59,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:58:59,730 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:58:59,787 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-06-05 21:58:59,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:59,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:59,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:58:59,791 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:58:59,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:58:59,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:58:59,795 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:58:59,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:58:59,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:58:59,819 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 21:58:59,903 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:58:59,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905051919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:58:59,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:58:59,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 21:58:59,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916524433] [2021-06-05 21:58:59,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:58:59,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:58:59,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:58:59,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:58:59,904 INFO L87 Difference]: Start difference. First operand 152 states and 308 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:00,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:00,796 INFO L93 Difference]: Finished difference Result 219 states and 423 transitions. [2021-06-05 21:59:00,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:59:00,796 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:00,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:00,797 INFO L225 Difference]: With dead ends: 219 [2021-06-05 21:59:00,797 INFO L226 Difference]: Without dead ends: 193 [2021-06-05 21:59:00,797 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 922.2ms TimeCoverageRelationStatistics Valid=152, Invalid=1180, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 21:59:00,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-06-05 21:59:00,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 155. [2021-06-05 21:59:00,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.0584415584415585) internal successors, (317), 154 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:00,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 317 transitions. [2021-06-05 21:59:00,798 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 317 transitions. Word has length 20 [2021-06-05 21:59:00,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:00,798 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 317 transitions. [2021-06-05 21:59:00,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:00,798 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 317 transitions. [2021-06-05 21:59:00,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:00,798 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:00,799 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:00,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 596 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3151 [2021-06-05 21:59:00,999 INFO L430 AbstractCegarLoop]: === Iteration 602 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:00,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:00,999 INFO L82 PathProgramCache]: Analyzing trace with hash -550602518, now seen corresponding path program 596 times [2021-06-05 21:59:00,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:00,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238878124] [2021-06-05 21:59:00,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:01,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:01,211 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:01,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:01,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238878124] [2021-06-05 21:59:01,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238878124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:01,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104382378] [2021-06-05 21:59:01,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 597 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 597 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:01,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:59:01,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:01,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:01,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:01,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:01,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:01,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:01,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:01,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:01,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:01,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:01,377 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:01,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:01,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:01,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:01,380 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:01,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:01,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:01,384 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:01,438 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-06-05 21:59:01,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:01,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:01,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:01,443 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:59:01,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:01,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:59:01,447 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:59:01,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:01,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:59:01,471 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 21:59:01,556 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:01,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104382378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:01,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:01,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 21:59:01,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307422307] [2021-06-05 21:59:01,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:59:01,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:01,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:59:01,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:59:01,557 INFO L87 Difference]: Start difference. First operand 155 states and 317 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:02,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:02,514 INFO L93 Difference]: Finished difference Result 212 states and 420 transitions. [2021-06-05 21:59:02,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:59:02,514 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:02,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:02,514 INFO L225 Difference]: With dead ends: 212 [2021-06-05 21:59:02,514 INFO L226 Difference]: Without dead ends: 193 [2021-06-05 21:59:02,514 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 971.3ms TimeCoverageRelationStatistics Valid=157, Invalid=1403, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 21:59:02,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-06-05 21:59:02,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 156. [2021-06-05 21:59:02,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.064516129032258) internal successors, (320), 155 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:02,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 320 transitions. [2021-06-05 21:59:02,516 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 320 transitions. Word has length 20 [2021-06-05 21:59:02,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:02,516 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 320 transitions. [2021-06-05 21:59:02,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:02,516 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 320 transitions. [2021-06-05 21:59:02,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:02,516 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:02,516 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:02,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 597 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3154 [2021-06-05 21:59:02,716 INFO L430 AbstractCegarLoop]: === Iteration 603 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:02,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:02,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1069380134, now seen corresponding path program 597 times [2021-06-05 21:59:02,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:02,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252831164] [2021-06-05 21:59:02,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:02,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:02,856 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:02,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:02,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252831164] [2021-06-05 21:59:02,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252831164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:02,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747189266] [2021-06-05 21:59:02,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 598 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 598 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:02,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:59:02,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:02,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:59:02,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:03,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:03,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:59:03,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:03,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:03,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:03,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 21:59:03,104 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:03,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:03,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:59:03,111 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-06-05 21:59:03,149 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:03,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747189266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:03,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:03,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 21:59:03,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736053671] [2021-06-05 21:59:03,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:59:03,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:03,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:59:03,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:59:03,150 INFO L87 Difference]: Start difference. First operand 156 states and 320 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:03,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:03,529 INFO L93 Difference]: Finished difference Result 191 states and 388 transitions. [2021-06-05 21:59:03,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:59:03,530 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:03,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:03,530 INFO L225 Difference]: With dead ends: 191 [2021-06-05 21:59:03,530 INFO L226 Difference]: Without dead ends: 184 [2021-06-05 21:59:03,530 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 409.6ms TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:59:03,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-06-05 21:59:03,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 157. [2021-06-05 21:59:03,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.0705128205128207) internal successors, (323), 156 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:03,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 323 transitions. [2021-06-05 21:59:03,531 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 323 transitions. Word has length 20 [2021-06-05 21:59:03,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:03,531 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 323 transitions. [2021-06-05 21:59:03,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:03,531 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 323 transitions. [2021-06-05 21:59:03,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:03,532 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:03,532 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:03,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3157,598 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:03,732 INFO L430 AbstractCegarLoop]: === Iteration 604 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:03,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:03,732 INFO L82 PathProgramCache]: Analyzing trace with hash 527558510, now seen corresponding path program 598 times [2021-06-05 21:59:03,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:03,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848874321] [2021-06-05 21:59:03,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:03,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:03,872 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:03,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:03,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848874321] [2021-06-05 21:59:03,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848874321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:03,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338762680] [2021-06-05 21:59:03,873 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 599 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 599 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:03,898 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:59:03,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:03,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:03,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:04,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:04,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:04,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:04,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:04,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:04,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:04,129 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:04,150 INFO L628 ElimStorePlain]: treesize reduction 37, result has 40.3 percent of original size [2021-06-05 21:59:04,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:04,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:59:04,153 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:59:04,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:04,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:59:04,161 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 21:59:04,203 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:04,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338762680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:04,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:04,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 21:59:04,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320035293] [2021-06-05 21:59:04,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:59:04,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:04,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:59:04,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:59:04,203 INFO L87 Difference]: Start difference. First operand 157 states and 323 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:04,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:04,562 INFO L93 Difference]: Finished difference Result 203 states and 405 transitions. [2021-06-05 21:59:04,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:59:04,562 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:04,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:04,562 INFO L225 Difference]: With dead ends: 203 [2021-06-05 21:59:04,562 INFO L226 Difference]: Without dead ends: 184 [2021-06-05 21:59:04,563 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 422.6ms TimeCoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:59:04,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-06-05 21:59:04,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 158. [2021-06-05 21:59:04,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.070063694267516) internal successors, (325), 157 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:04,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 325 transitions. [2021-06-05 21:59:04,564 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 325 transitions. Word has length 20 [2021-06-05 21:59:04,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:04,564 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 325 transitions. [2021-06-05 21:59:04,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:04,564 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 325 transitions. [2021-06-05 21:59:04,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:04,564 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:04,564 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:04,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 599 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3161 [2021-06-05 21:59:04,765 INFO L430 AbstractCegarLoop]: === Iteration 605 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:04,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:04,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1479911718, now seen corresponding path program 599 times [2021-06-05 21:59:04,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:04,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055113805] [2021-06-05 21:59:04,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:04,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:05,058 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:05,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:05,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055113805] [2021-06-05 21:59:05,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055113805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:05,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517022959] [2021-06-05 21:59:05,058 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 600 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 600 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:05,085 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:59:05,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:05,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:05,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:05,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:05,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:05,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:59:05,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:05,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:05,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:59:05,351 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:05,376 INFO L628 ElimStorePlain]: treesize reduction 40, result has 43.7 percent of original size [2021-06-05 21:59:05,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:05,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 21:59:05,379 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:05,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:05,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:59:05,387 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 21:59:05,432 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:05,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517022959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:05,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:05,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 21:59:05,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953148149] [2021-06-05 21:59:05,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:59:05,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:05,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:59:05,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:59:05,433 INFO L87 Difference]: Start difference. First operand 158 states and 325 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:05,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:05,755 INFO L93 Difference]: Finished difference Result 186 states and 369 transitions. [2021-06-05 21:59:05,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:59:05,755 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:05,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:05,755 INFO L225 Difference]: With dead ends: 186 [2021-06-05 21:59:05,755 INFO L226 Difference]: Without dead ends: 170 [2021-06-05 21:59:05,755 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 608.8ms TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:59:05,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-06-05 21:59:05,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 159. [2021-06-05 21:59:05,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.069620253164557) internal successors, (327), 158 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:05,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 327 transitions. [2021-06-05 21:59:05,757 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 327 transitions. Word has length 20 [2021-06-05 21:59:05,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:05,757 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 327 transitions. [2021-06-05 21:59:05,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:05,757 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 327 transitions. [2021-06-05 21:59:05,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:05,757 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:05,757 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:05,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 600 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3164 [2021-06-05 21:59:05,957 INFO L430 AbstractCegarLoop]: === Iteration 606 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:05,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:05,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1953050514, now seen corresponding path program 600 times [2021-06-05 21:59:05,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:05,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760965695] [2021-06-05 21:59:05,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:05,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:06,154 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:06,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:06,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760965695] [2021-06-05 21:59:06,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760965695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:06,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406725433] [2021-06-05 21:59:06,154 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 601 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 601 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:06,180 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:59:06,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:06,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:59:06,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:06,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:06,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:59:06,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:06,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:06,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:06,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:59:06,462 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:59:06,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:06,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:59:06,469 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-06-05 21:59:06,490 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:06,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406725433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:06,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:06,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 21:59:06,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585402942] [2021-06-05 21:59:06,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:59:06,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:06,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:59:06,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:59:06,491 INFO L87 Difference]: Start difference. First operand 159 states and 327 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:06,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:06,838 INFO L93 Difference]: Finished difference Result 189 states and 378 transitions. [2021-06-05 21:59:06,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:59:06,838 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:06,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:06,839 INFO L225 Difference]: With dead ends: 189 [2021-06-05 21:59:06,839 INFO L226 Difference]: Without dead ends: 182 [2021-06-05 21:59:06,839 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 510.0ms TimeCoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:59:06,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-06-05 21:59:06,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 160. [2021-06-05 21:59:06,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.0754716981132075) internal successors, (330), 159 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:06,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 330 transitions. [2021-06-05 21:59:06,840 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 330 transitions. Word has length 20 [2021-06-05 21:59:06,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:06,840 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 330 transitions. [2021-06-05 21:59:06,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:06,840 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 330 transitions. [2021-06-05 21:59:06,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:06,840 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:06,841 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:07,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3168,601 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:07,041 INFO L430 AbstractCegarLoop]: === Iteration 607 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:07,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:07,041 INFO L82 PathProgramCache]: Analyzing trace with hash -816865242, now seen corresponding path program 601 times [2021-06-05 21:59:07,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:07,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777381466] [2021-06-05 21:59:07,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:07,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:07,320 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:07,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:07,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777381466] [2021-06-05 21:59:07,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777381466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:07,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778226328] [2021-06-05 21:59:07,321 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:07,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:07,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:07,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:07,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:07,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:07,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:07,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:07,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:07,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:07,600 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:07,662 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-06-05 21:59:07,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:07,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:07,666 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:07,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:07,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:07,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:07,693 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:59:07,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:07,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:07,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:59:07,722 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:59:07,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:07,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:59:07,744 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 21:59:07,835 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:07,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778226328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:07,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:07,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 21:59:07,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119653661] [2021-06-05 21:59:07,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:59:07,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:07,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:59:07,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:59:07,835 INFO L87 Difference]: Start difference. First operand 160 states and 330 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:08,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:08,384 INFO L93 Difference]: Finished difference Result 216 states and 421 transitions. [2021-06-05 21:59:08,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:59:08,384 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:08,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:08,385 INFO L225 Difference]: With dead ends: 216 [2021-06-05 21:59:08,385 INFO L226 Difference]: Without dead ends: 197 [2021-06-05 21:59:08,385 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 756.4ms TimeCoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:59:08,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-06-05 21:59:08,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 157. [2021-06-05 21:59:08,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.0705128205128207) internal successors, (323), 156 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:08,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 323 transitions. [2021-06-05 21:59:08,386 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 323 transitions. Word has length 20 [2021-06-05 21:59:08,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:08,386 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 323 transitions. [2021-06-05 21:59:08,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:08,386 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 323 transitions. [2021-06-05 21:59:08,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:08,387 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:08,387 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:08,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3171,602 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:08,587 INFO L430 AbstractCegarLoop]: === Iteration 608 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:08,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:08,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1162384394, now seen corresponding path program 602 times [2021-06-05 21:59:08,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:08,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118553560] [2021-06-05 21:59:08,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:08,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:08,789 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:08,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:08,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118553560] [2021-06-05 21:59:08,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118553560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:08,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272676755] [2021-06-05 21:59:08,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 603 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 603 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:08,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:59:08,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:08,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:08,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:09,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:09,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:09,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:59:09,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:09,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:09,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:59:09,035 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:09,057 INFO L628 ElimStorePlain]: treesize reduction 40, result has 38.5 percent of original size [2021-06-05 21:59:09,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:09,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:59:09,060 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:59:09,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:09,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:59:09,068 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 21:59:09,112 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:09,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272676755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:09,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:09,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 21:59:09,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357141786] [2021-06-05 21:59:09,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:59:09,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:09,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:59:09,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:59:09,113 INFO L87 Difference]: Start difference. First operand 157 states and 323 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:09,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:09,382 INFO L93 Difference]: Finished difference Result 179 states and 357 transitions. [2021-06-05 21:59:09,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:59:09,382 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:09,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:09,382 INFO L225 Difference]: With dead ends: 179 [2021-06-05 21:59:09,382 INFO L226 Difference]: Without dead ends: 160 [2021-06-05 21:59:09,382 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 446.1ms TimeCoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:59:09,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-06-05 21:59:09,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 158. [2021-06-05 21:59:09,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.070063694267516) internal successors, (325), 157 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:09,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 325 transitions. [2021-06-05 21:59:09,384 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 325 transitions. Word has length 20 [2021-06-05 21:59:09,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:09,384 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 325 transitions. [2021-06-05 21:59:09,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:09,384 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 325 transitions. [2021-06-05 21:59:09,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:09,384 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:09,384 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:09,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 603 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3176 [2021-06-05 21:59:09,584 INFO L430 AbstractCegarLoop]: === Iteration 609 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:09,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:09,585 INFO L82 PathProgramCache]: Analyzing trace with hash -210031186, now seen corresponding path program 603 times [2021-06-05 21:59:09,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:09,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885119774] [2021-06-05 21:59:09,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:09,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:09,845 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:09,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:09,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885119774] [2021-06-05 21:59:09,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885119774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:09,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954012704] [2021-06-05 21:59:09,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 604 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 604 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:09,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:59:09,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:09,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:09,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:10,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:10,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:10,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:10,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:10,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:10,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:10,105 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:10,126 INFO L628 ElimStorePlain]: treesize reduction 34, result has 45.2 percent of original size [2021-06-05 21:59:10,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:10,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:10,129 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:59:10,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:10,136 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:59:10,136 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 21:59:10,180 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:10,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954012704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:10,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:10,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 21:59:10,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452826342] [2021-06-05 21:59:10,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:59:10,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:10,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:59:10,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:59:10,180 INFO L87 Difference]: Start difference. First operand 158 states and 325 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:10,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:10,518 INFO L93 Difference]: Finished difference Result 177 states and 354 transitions. [2021-06-05 21:59:10,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:59:10,518 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:10,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:10,518 INFO L225 Difference]: With dead ends: 177 [2021-06-05 21:59:10,518 INFO L226 Difference]: Without dead ends: 161 [2021-06-05 21:59:10,519 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 566.0ms TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:59:10,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-06-05 21:59:10,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2021-06-05 21:59:10,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.069620253164557) internal successors, (327), 158 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:10,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 327 transitions. [2021-06-05 21:59:10,520 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 327 transitions. Word has length 20 [2021-06-05 21:59:10,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:10,520 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 327 transitions. [2021-06-05 21:59:10,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:10,520 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 327 transitions. [2021-06-05 21:59:10,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:10,520 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:10,520 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:10,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3180,604 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:10,721 INFO L430 AbstractCegarLoop]: === Iteration 610 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:10,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:10,721 INFO L82 PathProgramCache]: Analyzing trace with hash 651973878, now seen corresponding path program 604 times [2021-06-05 21:59:10,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:10,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046197439] [2021-06-05 21:59:10,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:10,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:10,900 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:10,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:10,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046197439] [2021-06-05 21:59:10,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046197439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:10,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952793343] [2021-06-05 21:59:10,900 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 605 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 605 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:10,925 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:59:10,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:10,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:10,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:11,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:11,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:11,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:59:11,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:11,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:11,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:59:11,177 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:11,199 INFO L628 ElimStorePlain]: treesize reduction 40, result has 38.5 percent of original size [2021-06-05 21:59:11,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:11,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:59:11,202 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:59:11,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:11,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:59:11,210 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 21:59:11,249 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:11,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952793343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:11,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:11,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 21:59:11,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352135004] [2021-06-05 21:59:11,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:59:11,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:11,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:59:11,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:59:11,249 INFO L87 Difference]: Start difference. First operand 159 states and 327 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:11,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:11,717 INFO L93 Difference]: Finished difference Result 180 states and 364 transitions. [2021-06-05 21:59:11,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:59:11,717 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:11,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:11,717 INFO L225 Difference]: With dead ends: 180 [2021-06-05 21:59:11,718 INFO L226 Difference]: Without dead ends: 167 [2021-06-05 21:59:11,718 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 526.6ms TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:59:11,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-05 21:59:11,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 160. [2021-06-05 21:59:11,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.069182389937107) internal successors, (329), 159 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:11,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 329 transitions. [2021-06-05 21:59:11,719 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 329 transitions. Word has length 20 [2021-06-05 21:59:11,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:11,719 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 329 transitions. [2021-06-05 21:59:11,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:11,719 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 329 transitions. [2021-06-05 21:59:11,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:11,719 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:11,719 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:11,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 605 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3184 [2021-06-05 21:59:11,920 INFO L430 AbstractCegarLoop]: === Iteration 611 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:11,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:11,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1788159150, now seen corresponding path program 605 times [2021-06-05 21:59:11,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:11,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758579282] [2021-06-05 21:59:11,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:11,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:12,114 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:12,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:12,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758579282] [2021-06-05 21:59:12,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758579282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:12,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951835392] [2021-06-05 21:59:12,114 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 606 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 606 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:12,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:59:12,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:12,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:12,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:12,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:12,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:12,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:12,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:12,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:12,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:12,354 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:12,416 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-06-05 21:59:12,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:12,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:12,420 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:59:12,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:12,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:12,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:12,447 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:12,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:12,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:12,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:12,472 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:59:12,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:12,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:59:12,494 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 21:59:12,578 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:12,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951835392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:12,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:12,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 21:59:12,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829536401] [2021-06-05 21:59:12,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:59:12,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:12,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:59:12,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:59:12,579 INFO L87 Difference]: Start difference. First operand 160 states and 329 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:12,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:12,917 INFO L93 Difference]: Finished difference Result 201 states and 395 transitions. [2021-06-05 21:59:12,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:59:12,917 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:12,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:12,917 INFO L225 Difference]: With dead ends: 201 [2021-06-05 21:59:12,917 INFO L226 Difference]: Without dead ends: 182 [2021-06-05 21:59:12,917 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 538.2ms TimeCoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:59:12,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-06-05 21:59:12,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 156. [2021-06-05 21:59:12,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.0709677419354837) internal successors, (321), 155 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:12,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 321 transitions. [2021-06-05 21:59:12,919 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 321 transitions. Word has length 20 [2021-06-05 21:59:12,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:12,919 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 321 transitions. [2021-06-05 21:59:12,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:12,919 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 321 transitions. [2021-06-05 21:59:12,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:12,919 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:12,919 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:13,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 606 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3188 [2021-06-05 21:59:13,119 INFO L430 AbstractCegarLoop]: === Iteration 612 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:13,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:13,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1746467574, now seen corresponding path program 606 times [2021-06-05 21:59:13,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:13,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441032919] [2021-06-05 21:59:13,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:13,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:13,312 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:13,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:13,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441032919] [2021-06-05 21:59:13,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441032919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:13,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311179358] [2021-06-05 21:59:13,312 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 607 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 607 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:13,338 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:59:13,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:13,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:59:13,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:13,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:13,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:13,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:13,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:13,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:13,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:13,554 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:59:13,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:13,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:59:13,561 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2021-06-05 21:59:13,598 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:13,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311179358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:13,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:13,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 21:59:13,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614808104] [2021-06-05 21:59:13,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:59:13,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:13,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:59:13,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:59:13,599 INFO L87 Difference]: Start difference. First operand 156 states and 321 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:13,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:13,826 INFO L93 Difference]: Finished difference Result 180 states and 362 transitions. [2021-06-05 21:59:13,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:59:13,826 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:13,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:13,826 INFO L225 Difference]: With dead ends: 180 [2021-06-05 21:59:13,826 INFO L226 Difference]: Without dead ends: 173 [2021-06-05 21:59:13,826 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 400.3ms TimeCoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:59:13,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-06-05 21:59:13,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 159. [2021-06-05 21:59:13,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.0759493670886076) internal successors, (328), 158 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:13,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 328 transitions. [2021-06-05 21:59:13,828 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 328 transitions. Word has length 20 [2021-06-05 21:59:13,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:13,828 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 328 transitions. [2021-06-05 21:59:13,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:13,828 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 328 transitions. [2021-06-05 21:59:13,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:13,828 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:13,828 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:14,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 607 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3193 [2021-06-05 21:59:14,028 INFO L430 AbstractCegarLoop]: === Iteration 613 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:14,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:14,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1596146514, now seen corresponding path program 607 times [2021-06-05 21:59:14,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:14,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590927038] [2021-06-05 21:59:14,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:14,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:14,274 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:14,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:14,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590927038] [2021-06-05 21:59:14,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590927038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:14,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391089362] [2021-06-05 21:59:14,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 608 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 608 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:14,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:14,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:14,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:14,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:14,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:14,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:14,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:14,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:14,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:14,525 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:14,546 INFO L628 ElimStorePlain]: treesize reduction 34, result has 45.2 percent of original size [2021-06-05 21:59:14,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:14,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:14,549 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:59:14,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:14,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:59:14,557 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 21:59:14,602 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:14,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391089362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:14,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:14,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 21:59:14,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470906768] [2021-06-05 21:59:14,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:59:14,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:14,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:59:14,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:59:14,603 INFO L87 Difference]: Start difference. First operand 159 states and 328 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:14,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:14,944 INFO L93 Difference]: Finished difference Result 186 states and 371 transitions. [2021-06-05 21:59:14,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:59:14,945 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:14,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:14,945 INFO L225 Difference]: With dead ends: 186 [2021-06-05 21:59:14,945 INFO L226 Difference]: Without dead ends: 170 [2021-06-05 21:59:14,945 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 539.8ms TimeCoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:59:14,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-06-05 21:59:14,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 160. [2021-06-05 21:59:14,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.0754716981132075) internal successors, (330), 159 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:14,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 330 transitions. [2021-06-05 21:59:14,946 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 330 transitions. Word has length 20 [2021-06-05 21:59:14,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:14,946 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 330 transitions. [2021-06-05 21:59:14,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:14,947 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 330 transitions. [2021-06-05 21:59:14,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:14,947 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:14,947 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:15,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 608 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3196 [2021-06-05 21:59:15,147 INFO L430 AbstractCegarLoop]: === Iteration 614 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:15,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:15,147 INFO L82 PathProgramCache]: Analyzing trace with hash -734141450, now seen corresponding path program 608 times [2021-06-05 21:59:15,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:15,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523531069] [2021-06-05 21:59:15,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:15,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:15,345 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:15,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:15,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523531069] [2021-06-05 21:59:15,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523531069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:15,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095175026] [2021-06-05 21:59:15,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 609 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 609 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:15,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:59:15,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:15,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:15,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:15,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:15,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:15,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:15,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:15,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:15,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:15,657 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:15,684 INFO L628 ElimStorePlain]: treesize reduction 37, result has 43.1 percent of original size [2021-06-05 21:59:15,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:15,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:15,688 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:59:15,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:15,697 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:59:15,697 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 21:59:15,750 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:15,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095175026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:15,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:15,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 21:59:15,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641624399] [2021-06-05 21:59:15,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:59:15,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:15,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:59:15,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:59:15,751 INFO L87 Difference]: Start difference. First operand 160 states and 330 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:16,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:16,394 INFO L93 Difference]: Finished difference Result 196 states and 393 transitions. [2021-06-05 21:59:16,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:59:16,394 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:16,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:16,395 INFO L225 Difference]: With dead ends: 196 [2021-06-05 21:59:16,395 INFO L226 Difference]: Without dead ends: 183 [2021-06-05 21:59:16,395 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 656.4ms TimeCoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:59:16,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-05 21:59:16,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 161. [2021-06-05 21:59:16,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.075) internal successors, (332), 160 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:16,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 332 transitions. [2021-06-05 21:59:16,396 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 332 transitions. Word has length 20 [2021-06-05 21:59:16,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:16,396 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 332 transitions. [2021-06-05 21:59:16,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:16,396 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 332 transitions. [2021-06-05 21:59:16,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:16,397 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:16,397 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:16,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 609 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3199 [2021-06-05 21:59:16,597 INFO L430 AbstractCegarLoop]: === Iteration 615 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:16,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:16,597 INFO L82 PathProgramCache]: Analyzing trace with hash 402043822, now seen corresponding path program 609 times [2021-06-05 21:59:16,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:16,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426391143] [2021-06-05 21:59:16,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:16,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:16,792 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:16,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:16,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426391143] [2021-06-05 21:59:16,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426391143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:16,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685243618] [2021-06-05 21:59:16,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 610 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 610 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:16,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:59:16,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:16,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:16,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:17,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:17,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:17,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:17,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:17,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:17,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:17,049 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:17,113 INFO L628 ElimStorePlain]: treesize reduction 95, result has 40.6 percent of original size [2021-06-05 21:59:17,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:17,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:17,116 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:17,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:17,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:17,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:17,142 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:59:17,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:17,164 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:59:17,165 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:59:17,165 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:173, output treesize:36 [2021-06-05 21:59:17,245 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:17,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685243618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:17,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:17,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 21:59:17,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298243488] [2021-06-05 21:59:17,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:59:17,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:17,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:59:17,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:59:17,246 INFO L87 Difference]: Start difference. First operand 161 states and 332 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:17,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:17,744 INFO L93 Difference]: Finished difference Result 196 states and 391 transitions. [2021-06-05 21:59:17,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:59:17,744 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:17,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:17,745 INFO L225 Difference]: With dead ends: 196 [2021-06-05 21:59:17,745 INFO L226 Difference]: Without dead ends: 184 [2021-06-05 21:59:17,745 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 605.0ms TimeCoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:59:17,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-06-05 21:59:17,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 159. [2021-06-05 21:59:17,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.0759493670886076) internal successors, (328), 158 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:17,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 328 transitions. [2021-06-05 21:59:17,746 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 328 transitions. Word has length 20 [2021-06-05 21:59:17,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:17,746 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 328 transitions. [2021-06-05 21:59:17,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:17,746 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 328 transitions. [2021-06-05 21:59:17,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:17,747 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:17,747 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:17,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3203,610 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:17,947 INFO L430 AbstractCegarLoop]: === Iteration 616 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:17,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:17,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1813022502, now seen corresponding path program 610 times [2021-06-05 21:59:17,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:17,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840592790] [2021-06-05 21:59:17,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:17,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:18,142 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:18,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:18,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840592790] [2021-06-05 21:59:18,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840592790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:18,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710287898] [2021-06-05 21:59:18,143 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 611 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 611 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:18,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:59:18,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:18,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:18,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:18,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:18,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:18,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:18,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:18,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:18,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:18,370 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:18,391 INFO L628 ElimStorePlain]: treesize reduction 34, result has 45.2 percent of original size [2021-06-05 21:59:18,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:18,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:18,394 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:59:18,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:18,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:59:18,402 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 21:59:18,444 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:18,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710287898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:18,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:18,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 21:59:18,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522460838] [2021-06-05 21:59:18,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:59:18,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:18,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:59:18,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:59:18,444 INFO L87 Difference]: Start difference. First operand 159 states and 328 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:18,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:18,729 INFO L93 Difference]: Finished difference Result 182 states and 365 transitions. [2021-06-05 21:59:18,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:59:18,729 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:18,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:18,730 INFO L225 Difference]: With dead ends: 182 [2021-06-05 21:59:18,730 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 21:59:18,730 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 477.2ms TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:59:18,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 21:59:18,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 161. [2021-06-05 21:59:18,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.075) internal successors, (332), 160 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:18,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 332 transitions. [2021-06-05 21:59:18,731 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 332 transitions. Word has length 20 [2021-06-05 21:59:18,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:18,731 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 332 transitions. [2021-06-05 21:59:18,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:18,731 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 332 transitions. [2021-06-05 21:59:18,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:18,731 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:18,731 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:18,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 611 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3208 [2021-06-05 21:59:18,932 INFO L430 AbstractCegarLoop]: === Iteration 617 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:18,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:18,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1619939730, now seen corresponding path program 611 times [2021-06-05 21:59:18,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:18,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608029006] [2021-06-05 21:59:18,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:18,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:19,126 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:19,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:19,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608029006] [2021-06-05 21:59:19,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608029006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:19,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607886090] [2021-06-05 21:59:19,126 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 612 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 612 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:19,152 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:59:19,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:19,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:19,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:19,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:19,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:19,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:59:19,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:19,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:19,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:59:19,370 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:19,392 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-06-05 21:59:19,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:19,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:59:19,395 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:59:19,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:19,403 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:59:19,403 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 21:59:19,441 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:19,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607886090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:19,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:19,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 21:59:19,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425824173] [2021-06-05 21:59:19,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:59:19,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:19,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:59:19,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:59:19,442 INFO L87 Difference]: Start difference. First operand 161 states and 332 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:20,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:20,006 INFO L93 Difference]: Finished difference Result 185 states and 375 transitions. [2021-06-05 21:59:20,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:59:20,006 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:20,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:20,006 INFO L225 Difference]: With dead ends: 185 [2021-06-05 21:59:20,006 INFO L226 Difference]: Without dead ends: 172 [2021-06-05 21:59:20,007 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 623.2ms TimeCoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:59:20,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-05 21:59:20,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 162. [2021-06-05 21:59:20,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.0745341614906834) internal successors, (334), 161 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:20,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 334 transitions. [2021-06-05 21:59:20,008 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 334 transitions. Word has length 20 [2021-06-05 21:59:20,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:20,008 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 334 transitions. [2021-06-05 21:59:20,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:20,008 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 334 transitions. [2021-06-05 21:59:20,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:20,008 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:20,008 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:20,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 612 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3212 [2021-06-05 21:59:20,209 INFO L430 AbstractCegarLoop]: === Iteration 618 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:20,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:20,209 INFO L82 PathProgramCache]: Analyzing trace with hash -483754458, now seen corresponding path program 612 times [2021-06-05 21:59:20,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:20,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332570597] [2021-06-05 21:59:20,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:20,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:20,431 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:20,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:20,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332570597] [2021-06-05 21:59:20,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332570597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:20,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789860820] [2021-06-05 21:59:20,431 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 613 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 613 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:20,457 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:59:20,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:20,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:59:20,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:20,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:20,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:20,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:20,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:20,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:20,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:59:20,664 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:59:20,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:20,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:20,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:20,690 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:20,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:20,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:20,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:20,714 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:59:20,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:20,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:59:20,734 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-06-05 21:59:20,812 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:20,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789860820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:20,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:20,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 21:59:20,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105481075] [2021-06-05 21:59:20,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:59:20,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:20,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:59:20,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:59:20,813 INFO L87 Difference]: Start difference. First operand 162 states and 334 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:21,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:21,372 INFO L93 Difference]: Finished difference Result 185 states and 378 transitions. [2021-06-05 21:59:21,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:59:21,373 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:21,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:21,373 INFO L225 Difference]: With dead ends: 185 [2021-06-05 21:59:21,373 INFO L226 Difference]: Without dead ends: 178 [2021-06-05 21:59:21,373 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 674.3ms TimeCoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:59:21,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-06-05 21:59:21,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 161. [2021-06-05 21:59:21,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.075) internal successors, (332), 160 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:21,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 332 transitions. [2021-06-05 21:59:21,374 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 332 transitions. Word has length 20 [2021-06-05 21:59:21,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:21,374 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 332 transitions. [2021-06-05 21:59:21,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:21,375 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 332 transitions. [2021-06-05 21:59:21,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:21,375 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:21,375 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:21,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3215,613 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:21,575 INFO L430 AbstractCegarLoop]: === Iteration 619 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:21,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:21,575 INFO L82 PathProgramCache]: Analyzing trace with hash -725542874, now seen corresponding path program 613 times [2021-06-05 21:59:21,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:21,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805215950] [2021-06-05 21:59:21,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:21,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:21,754 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:21,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:21,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805215950] [2021-06-05 21:59:21,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805215950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:21,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323152074] [2021-06-05 21:59:21,755 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 614 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 614 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:21,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:21,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:21,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:22,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:22,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:22,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:59:22,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:22,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:22,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:59:22,012 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:22,034 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-06-05 21:59:22,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:22,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:59:22,037 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:59:22,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:22,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:59:22,045 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 21:59:22,088 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:22,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323152074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:22,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:22,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 21:59:22,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652088360] [2021-06-05 21:59:22,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:59:22,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:22,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:59:22,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:59:22,089 INFO L87 Difference]: Start difference. First operand 161 states and 332 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:22,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:22,361 INFO L93 Difference]: Finished difference Result 183 states and 367 transitions. [2021-06-05 21:59:22,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:59:22,361 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:22,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:22,361 INFO L225 Difference]: With dead ends: 183 [2021-06-05 21:59:22,361 INFO L226 Difference]: Without dead ends: 167 [2021-06-05 21:59:22,361 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 436.2ms TimeCoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:59:22,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-05 21:59:22,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 164. [2021-06-05 21:59:22,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.0736196319018405) internal successors, (338), 163 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:22,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 338 transitions. [2021-06-05 21:59:22,363 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 338 transitions. Word has length 20 [2021-06-05 21:59:22,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:22,363 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 338 transitions. [2021-06-05 21:59:22,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:22,363 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 338 transitions. [2021-06-05 21:59:22,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:22,363 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:22,363 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:22,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3220,614 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:22,563 INFO L430 AbstractCegarLoop]: === Iteration 620 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:22,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:22,564 INFO L82 PathProgramCache]: Analyzing trace with hash 136462190, now seen corresponding path program 614 times [2021-06-05 21:59:22,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:22,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264804376] [2021-06-05 21:59:22,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:22,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:22,744 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:22,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:22,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264804376] [2021-06-05 21:59:22,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264804376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:22,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236831689] [2021-06-05 21:59:22,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 615 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 615 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:22,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:59:22,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:22,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:22,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:22,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:22,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:22,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:22,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:22,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:22,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:22,993 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:23,018 INFO L628 ElimStorePlain]: treesize reduction 37, result has 40.3 percent of original size [2021-06-05 21:59:23,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:23,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:59:23,022 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:59:23,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:23,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:59:23,031 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 21:59:23,081 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:23,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236831689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:23,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:23,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 21:59:23,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464636516] [2021-06-05 21:59:23,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:59:23,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:23,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:59:23,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:59:23,081 INFO L87 Difference]: Start difference. First operand 164 states and 338 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:23,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:23,546 INFO L93 Difference]: Finished difference Result 186 states and 377 transitions. [2021-06-05 21:59:23,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:59:23,546 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:23,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:23,546 INFO L225 Difference]: With dead ends: 186 [2021-06-05 21:59:23,546 INFO L226 Difference]: Without dead ends: 173 [2021-06-05 21:59:23,546 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 565.1ms TimeCoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:59:23,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-06-05 21:59:23,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 165. [2021-06-05 21:59:23,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.073170731707317) internal successors, (340), 164 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:23,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 340 transitions. [2021-06-05 21:59:23,548 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 340 transitions. Word has length 20 [2021-06-05 21:59:23,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:23,548 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 340 transitions. [2021-06-05 21:59:23,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:23,548 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 340 transitions. [2021-06-05 21:59:23,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:23,548 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:23,548 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:23,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3224,615 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:23,748 INFO L430 AbstractCegarLoop]: === Iteration 621 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:23,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:23,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1272647462, now seen corresponding path program 615 times [2021-06-05 21:59:23,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:23,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626847932] [2021-06-05 21:59:23,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:23,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:23,970 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:23,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:23,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626847932] [2021-06-05 21:59:23,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626847932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:23,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603547703] [2021-06-05 21:59:23,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 616 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 616 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:23,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:59:23,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:23,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:23,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:24,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:24,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:24,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:24,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:24,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:24,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:24,190 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:24,251 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-06-05 21:59:24,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:24,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:24,267 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:24,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:24,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:24,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:59:24,294 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:59:24,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:24,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:24,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:24,322 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:59:24,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:24,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:59:24,345 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 21:59:24,430 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:24,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603547703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:24,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:24,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 21:59:24,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485981753] [2021-06-05 21:59:24,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:59:24,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:24,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:59:24,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:59:24,431 INFO L87 Difference]: Start difference. First operand 165 states and 340 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:24,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:24,987 INFO L93 Difference]: Finished difference Result 209 states and 412 transitions. [2021-06-05 21:59:24,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:59:24,987 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:24,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:24,988 INFO L225 Difference]: With dead ends: 209 [2021-06-05 21:59:24,988 INFO L226 Difference]: Without dead ends: 190 [2021-06-05 21:59:24,988 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 707.3ms TimeCoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:59:24,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-06-05 21:59:24,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 163. [2021-06-05 21:59:24,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.074074074074074) internal successors, (336), 162 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:24,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 336 transitions. [2021-06-05 21:59:24,989 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 336 transitions. Word has length 20 [2021-06-05 21:59:24,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:24,989 INFO L482 AbstractCegarLoop]: Abstraction has 163 states and 336 transitions. [2021-06-05 21:59:24,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:24,989 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 336 transitions. [2021-06-05 21:59:24,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:24,990 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:24,990 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:25,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3228,616 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:25,190 INFO L430 AbstractCegarLoop]: === Iteration 622 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:25,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:25,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1970321930, now seen corresponding path program 616 times [2021-06-05 21:59:25,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:25,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771672063] [2021-06-05 21:59:25,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:25,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:25,349 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:25,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:25,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771672063] [2021-06-05 21:59:25,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771672063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:25,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828509445] [2021-06-05 21:59:25,349 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 617 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 617 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:25,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:59:25,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:25,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:25,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:25,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:25,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:25,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:59:25,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:25,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:25,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:59:25,554 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:25,576 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-06-05 21:59:25,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:25,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:59:25,579 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:59:25,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:25,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:59:25,586 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 21:59:25,626 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:25,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828509445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:25,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:25,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 21:59:25,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143221927] [2021-06-05 21:59:25,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:59:25,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:25,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:59:25,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:59:25,627 INFO L87 Difference]: Start difference. First operand 163 states and 336 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:26,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:26,022 INFO L93 Difference]: Finished difference Result 186 states and 377 transitions. [2021-06-05 21:59:26,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:59:26,022 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:26,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:26,023 INFO L225 Difference]: With dead ends: 186 [2021-06-05 21:59:26,023 INFO L226 Difference]: Without dead ends: 173 [2021-06-05 21:59:26,023 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 501.8ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:59:26,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-06-05 21:59:26,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 165. [2021-06-05 21:59:26,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.073170731707317) internal successors, (340), 164 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:26,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 340 transitions. [2021-06-05 21:59:26,024 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 340 transitions. Word has length 20 [2021-06-05 21:59:26,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:26,024 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 340 transitions. [2021-06-05 21:59:26,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:26,024 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 340 transitions. [2021-06-05 21:59:26,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:26,024 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:26,024 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:26,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3233,617 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:26,225 INFO L430 AbstractCegarLoop]: === Iteration 623 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:26,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:26,225 INFO L82 PathProgramCache]: Analyzing trace with hash -834136658, now seen corresponding path program 617 times [2021-06-05 21:59:26,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:26,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415122110] [2021-06-05 21:59:26,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:26,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:26,484 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:26,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:26,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415122110] [2021-06-05 21:59:26,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415122110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:26,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024314244] [2021-06-05 21:59:26,484 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 618 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 618 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:26,511 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:59:26,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:26,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:26,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:26,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:26,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:26,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:26,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:26,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:26,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:26,674 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:26,733 INFO L628 ElimStorePlain]: treesize reduction 91, result has 43.1 percent of original size [2021-06-05 21:59:26,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 21:59:26,736 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:26,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:26,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:26,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:26,762 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:59:26,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:26,783 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 21:59:26,784 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:59:26,784 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:173, output treesize:36 [2021-06-05 21:59:26,860 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:26,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024314244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:26,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:26,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 21:59:26,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182190851] [2021-06-05 21:59:26,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:59:26,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:26,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:59:26,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:59:26,861 INFO L87 Difference]: Start difference. First operand 165 states and 340 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:27,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:27,394 INFO L93 Difference]: Finished difference Result 208 states and 410 transitions. [2021-06-05 21:59:27,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:59:27,394 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:27,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:27,394 INFO L225 Difference]: With dead ends: 208 [2021-06-05 21:59:27,394 INFO L226 Difference]: Without dead ends: 189 [2021-06-05 21:59:27,395 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 753.9ms TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:59:27,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-06-05 21:59:27,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 164. [2021-06-05 21:59:27,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.0736196319018405) internal successors, (338), 163 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:27,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 338 transitions. [2021-06-05 21:59:27,396 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 338 transitions. Word has length 20 [2021-06-05 21:59:27,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:27,396 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 338 transitions. [2021-06-05 21:59:27,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:27,396 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 338 transitions. [2021-06-05 21:59:27,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:27,396 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:27,396 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:27,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3236,618 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:27,597 INFO L430 AbstractCegarLoop]: === Iteration 624 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:27,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:27,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1314659878, now seen corresponding path program 618 times [2021-06-05 21:59:27,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:27,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876625732] [2021-06-05 21:59:27,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:27,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:27,770 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:27,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:27,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876625732] [2021-06-05 21:59:27,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876625732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:27,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831128485] [2021-06-05 21:59:27,770 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 619 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 619 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:27,797 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:59:27,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:27,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:27,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:27,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:27,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:27,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:27,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:27,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:27,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:27,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:27,926 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:27,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:27,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:27,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:27,930 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:27,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:27,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:27,933 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:27,986 INFO L628 ElimStorePlain]: treesize reduction 83, result has 44.7 percent of original size [2021-06-05 21:59:27,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:27,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:27,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:59:27,990 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:59:27,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:27,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:27,994 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:59:28,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:28,018 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:59:28,018 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 21:59:28,096 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:28,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831128485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:28,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:28,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 21:59:28,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244089836] [2021-06-05 21:59:28,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:59:28,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:28,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:59:28,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:59:28,097 INFO L87 Difference]: Start difference. First operand 164 states and 338 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:28,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:28,523 INFO L93 Difference]: Finished difference Result 192 states and 392 transitions. [2021-06-05 21:59:28,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:59:28,523 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:28,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:28,523 INFO L225 Difference]: With dead ends: 192 [2021-06-05 21:59:28,523 INFO L226 Difference]: Without dead ends: 180 [2021-06-05 21:59:28,523 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 542.1ms TimeCoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:59:28,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-06-05 21:59:28,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 165. [2021-06-05 21:59:28,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.0792682926829267) internal successors, (341), 164 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:28,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 341 transitions. [2021-06-05 21:59:28,525 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 341 transitions. Word has length 20 [2021-06-05 21:59:28,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:28,525 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 341 transitions. [2021-06-05 21:59:28,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:28,525 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 341 transitions. [2021-06-05 21:59:28,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:28,525 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:28,525 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:28,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 619 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3241 [2021-06-05 21:59:28,725 INFO L430 AbstractCegarLoop]: === Iteration 625 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:28,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:28,726 INFO L82 PathProgramCache]: Analyzing trace with hash -251095818, now seen corresponding path program 619 times [2021-06-05 21:59:28,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:28,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249426119] [2021-06-05 21:59:28,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:28,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:28,892 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:28,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:28,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249426119] [2021-06-05 21:59:28,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249426119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:28,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680779072] [2021-06-05 21:59:28,893 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 620 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 620 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:28,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:28,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:28,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:29,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:29,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:29,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:59:29,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:29,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:29,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:59:29,101 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:29,123 INFO L628 ElimStorePlain]: treesize reduction 46, result has 35.2 percent of original size [2021-06-05 21:59:29,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:29,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:59:29,126 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:59:29,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:29,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:59:29,134 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 21:59:29,179 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:29,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680779072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:29,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:29,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 21:59:29,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164809105] [2021-06-05 21:59:29,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:59:29,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:29,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:59:29,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:59:29,180 INFO L87 Difference]: Start difference. First operand 165 states and 341 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:29,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:29,571 INFO L93 Difference]: Finished difference Result 191 states and 388 transitions. [2021-06-05 21:59:29,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:59:29,571 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:29,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:29,572 INFO L225 Difference]: With dead ends: 191 [2021-06-05 21:59:29,572 INFO L226 Difference]: Without dead ends: 178 [2021-06-05 21:59:29,572 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 461.2ms TimeCoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:59:29,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-06-05 21:59:29,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 171. [2021-06-05 21:59:29,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.0764705882352943) internal successors, (353), 170 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:29,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 353 transitions. [2021-06-05 21:59:29,573 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 353 transitions. Word has length 20 [2021-06-05 21:59:29,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:29,573 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 353 transitions. [2021-06-05 21:59:29,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:29,573 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 353 transitions. [2021-06-05 21:59:29,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:29,574 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:29,574 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:29,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3244,620 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:29,774 INFO L430 AbstractCegarLoop]: === Iteration 626 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:29,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:29,774 INFO L82 PathProgramCache]: Analyzing trace with hash 885089454, now seen corresponding path program 620 times [2021-06-05 21:59:29,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:29,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018574462] [2021-06-05 21:59:29,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:29,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:29,933 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:29,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:29,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018574462] [2021-06-05 21:59:29,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018574462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:29,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094122927] [2021-06-05 21:59:29,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 621 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 621 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:29,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:59:29,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:29,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:29,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:30,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:30,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:30,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:30,111 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:30,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:30,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:30,114 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:30,175 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-06-05 21:59:30,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:30,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:30,184 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:59:30,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:30,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:30,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:30,211 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:30,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:30,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:30,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:59:30,238 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:59:30,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:30,259 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:59:30,259 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 21:59:30,335 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:30,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094122927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:30,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:30,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 21:59:30,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488381187] [2021-06-05 21:59:30,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:59:30,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:30,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:59:30,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:59:30,336 INFO L87 Difference]: Start difference. First operand 171 states and 353 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:30,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:30,761 INFO L93 Difference]: Finished difference Result 213 states and 421 transitions. [2021-06-05 21:59:30,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:59:30,761 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:30,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:30,762 INFO L225 Difference]: With dead ends: 213 [2021-06-05 21:59:30,762 INFO L226 Difference]: Without dead ends: 194 [2021-06-05 21:59:30,762 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 469.2ms TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:59:30,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-06-05 21:59:30,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 170. [2021-06-05 21:59:30,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.076923076923077) internal successors, (351), 169 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:30,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 351 transitions. [2021-06-05 21:59:30,763 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 351 transitions. Word has length 20 [2021-06-05 21:59:30,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:30,763 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 351 transitions. [2021-06-05 21:59:30,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:30,763 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 351 transitions. [2021-06-05 21:59:30,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:30,763 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:30,764 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:30,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3247,621 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:30,964 INFO L430 AbstractCegarLoop]: === Iteration 627 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:30,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:30,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1261081306, now seen corresponding path program 621 times [2021-06-05 21:59:30,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:30,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526548140] [2021-06-05 21:59:30,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:30,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:31,186 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:31,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:31,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526548140] [2021-06-05 21:59:31,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526548140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:31,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833457389] [2021-06-05 21:59:31,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 622 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 622 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:31,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:59:31,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:31,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 21:59:31,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:31,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:31,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:31,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:31,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:31,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:31,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:31,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:31,348 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:31,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:31,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:31,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:31,352 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:31,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:31,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:31,355 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:31,403 INFO L628 ElimStorePlain]: treesize reduction 77, result has 43.0 percent of original size [2021-06-05 21:59:31,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:31,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:31,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:59:31,408 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:59:31,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:31,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:59:31,411 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:59:31,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:31,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:59:31,431 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:161, output treesize:32 [2021-06-05 21:59:31,509 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:31,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833457389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:31,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:31,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 21:59:31,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249070151] [2021-06-05 21:59:31,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:59:31,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:31,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:59:31,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:59:31,510 INFO L87 Difference]: Start difference. First operand 170 states and 351 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:32,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:32,244 INFO L93 Difference]: Finished difference Result 222 states and 444 transitions. [2021-06-05 21:59:32,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:59:32,244 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:32,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:32,244 INFO L225 Difference]: With dead ends: 222 [2021-06-05 21:59:32,244 INFO L226 Difference]: Without dead ends: 203 [2021-06-05 21:59:32,244 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 850.5ms TimeCoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 21:59:32,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-06-05 21:59:32,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 169. [2021-06-05 21:59:32,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.0773809523809526) internal successors, (349), 168 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:32,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 349 transitions. [2021-06-05 21:59:32,246 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 349 transitions. Word has length 20 [2021-06-05 21:59:32,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:32,246 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 349 transitions. [2021-06-05 21:59:32,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:32,246 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 349 transitions. [2021-06-05 21:59:32,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:32,246 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:32,246 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:32,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 622 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3252 [2021-06-05 21:59:32,446 INFO L430 AbstractCegarLoop]: === Iteration 628 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:32,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:32,447 INFO L82 PathProgramCache]: Analyzing trace with hash 927101870, now seen corresponding path program 622 times [2021-06-05 21:59:32,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:32,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522582498] [2021-06-05 21:59:32,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:32,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:32,677 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:32,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:32,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522582498] [2021-06-05 21:59:32,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522582498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:32,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64664] [2021-06-05 21:59:32,677 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 623 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 623 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:32,703 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:59:32,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:32,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:32,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:32,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:32,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:32,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:32,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:32,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:32,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:32,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:32,856 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:32,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:32,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:32,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:32,862 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:32,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:32,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:32,879 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:32,933 INFO L628 ElimStorePlain]: treesize reduction 77, result has 46.5 percent of original size [2021-06-05 21:59:32,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:32,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:32,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:59:32,938 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:59:32,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:32,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:32,941 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:59:32,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:32,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:59:32,966 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 21:59:33,050 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:33,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:33,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:33,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 21:59:33,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757293205] [2021-06-05 21:59:33,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:59:33,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:33,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:59:33,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:59:33,051 INFO L87 Difference]: Start difference. First operand 169 states and 349 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:34,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:34,039 INFO L93 Difference]: Finished difference Result 262 states and 511 transitions. [2021-06-05 21:59:34,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:59:34,039 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:34,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:34,039 INFO L225 Difference]: With dead ends: 262 [2021-06-05 21:59:34,039 INFO L226 Difference]: Without dead ends: 229 [2021-06-05 21:59:34,040 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1050.7ms TimeCoverageRelationStatistics Valid=161, Invalid=1245, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 21:59:34,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-06-05 21:59:34,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 173. [2021-06-05 21:59:34,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.0988372093023258) internal successors, (361), 172 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:34,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 361 transitions. [2021-06-05 21:59:34,041 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 361 transitions. Word has length 20 [2021-06-05 21:59:34,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:34,041 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 361 transitions. [2021-06-05 21:59:34,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:34,041 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 361 transitions. [2021-06-05 21:59:34,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:34,042 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:34,042 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:34,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3255,623 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:34,242 INFO L430 AbstractCegarLoop]: === Iteration 629 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:34,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:34,242 INFO L82 PathProgramCache]: Analyzing trace with hash 41303590, now seen corresponding path program 623 times [2021-06-05 21:59:34,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:34,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609771854] [2021-06-05 21:59:34,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:34,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:34,457 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:34,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:34,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609771854] [2021-06-05 21:59:34,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609771854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:34,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850868519] [2021-06-05 21:59:34,457 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 624 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 624 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:34,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:59:34,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:34,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:34,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:34,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:34,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:34,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:34,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:34,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:34,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:34,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:34,656 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:34,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:34,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:34,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:34,660 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:34,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:34,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:34,663 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:34,717 INFO L628 ElimStorePlain]: treesize reduction 90, result has 38.8 percent of original size [2021-06-05 21:59:34,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:34,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:59:34,721 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:59:34,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:34,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:59:34,745 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:173, output treesize:36 [2021-06-05 21:59:34,826 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:34,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850868519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:34,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:34,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 21:59:34,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632550997] [2021-06-05 21:59:34,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:59:34,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:34,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:59:34,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:59:34,827 INFO L87 Difference]: Start difference. First operand 173 states and 361 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:35,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:35,458 INFO L93 Difference]: Finished difference Result 232 states and 468 transitions. [2021-06-05 21:59:35,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:59:35,459 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:35,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:35,459 INFO L225 Difference]: With dead ends: 232 [2021-06-05 21:59:35,459 INFO L226 Difference]: Without dead ends: 213 [2021-06-05 21:59:35,459 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 763.4ms TimeCoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:59:35,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-06-05 21:59:35,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 174. [2021-06-05 21:59:35,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.1040462427745665) internal successors, (364), 173 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:35,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 364 transitions. [2021-06-05 21:59:35,461 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 364 transitions. Word has length 20 [2021-06-05 21:59:35,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:35,461 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 364 transitions. [2021-06-05 21:59:35,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:35,461 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 364 transitions. [2021-06-05 21:59:35,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:35,461 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:35,461 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:35,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 624 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3258 [2021-06-05 21:59:35,662 INFO L430 AbstractCegarLoop]: === Iteration 630 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:35,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:35,662 INFO L82 PathProgramCache]: Analyzing trace with hash 502100586, now seen corresponding path program 624 times [2021-06-05 21:59:35,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:35,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255338852] [2021-06-05 21:59:35,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:35,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:35,807 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:35,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:35,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255338852] [2021-06-05 21:59:35,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255338852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:35,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191356718] [2021-06-05 21:59:35,807 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 625 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 625 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:35,833 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:59:35,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:35,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:59:35,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:36,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:36,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:59:36,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:36,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:36,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:36,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 21:59:36,067 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:36,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:36,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:59:36,073 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-06-05 21:59:36,112 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:36,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191356718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:36,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:36,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 21:59:36,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155116050] [2021-06-05 21:59:36,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:59:36,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:36,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:59:36,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:59:36,113 INFO L87 Difference]: Start difference. First operand 174 states and 364 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:36,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:36,525 INFO L93 Difference]: Finished difference Result 210 states and 434 transitions. [2021-06-05 21:59:36,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:59:36,525 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:36,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:36,525 INFO L225 Difference]: With dead ends: 210 [2021-06-05 21:59:36,525 INFO L226 Difference]: Without dead ends: 203 [2021-06-05 21:59:36,526 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 447.4ms TimeCoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:59:36,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-06-05 21:59:36,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 175. [2021-06-05 21:59:36,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.1091954022988504) internal successors, (367), 174 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:36,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 367 transitions. [2021-06-05 21:59:36,527 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 367 transitions. Word has length 20 [2021-06-05 21:59:36,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:36,527 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 367 transitions. [2021-06-05 21:59:36,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:36,527 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 367 transitions. [2021-06-05 21:59:36,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:36,527 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:36,527 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:36,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 625 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3261 [2021-06-05 21:59:36,728 INFO L430 AbstractCegarLoop]: === Iteration 631 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:36,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:36,728 INFO L82 PathProgramCache]: Analyzing trace with hash -39721038, now seen corresponding path program 625 times [2021-06-05 21:59:36,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:36,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484795642] [2021-06-05 21:59:36,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:36,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:36,885 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:36,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:36,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484795642] [2021-06-05 21:59:36,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484795642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:36,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503714841] [2021-06-05 21:59:36,885 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 626 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 626 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:36,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:36,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:36,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:37,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:37,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:37,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:37,161 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:37,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:37,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:37,165 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:37,189 INFO L628 ElimStorePlain]: treesize reduction 37, result has 43.1 percent of original size [2021-06-05 21:59:37,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:37,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:37,192 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:59:37,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:37,200 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:59:37,200 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 21:59:37,239 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:37,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503714841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:37,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:37,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 21:59:37,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595723738] [2021-06-05 21:59:37,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 21:59:37,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:37,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 21:59:37,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:59:37,240 INFO L87 Difference]: Start difference. First operand 175 states and 367 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:37,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:37,589 INFO L93 Difference]: Finished difference Result 222 states and 451 transitions. [2021-06-05 21:59:37,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:59:37,590 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:37,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:37,590 INFO L225 Difference]: With dead ends: 222 [2021-06-05 21:59:37,590 INFO L226 Difference]: Without dead ends: 203 [2021-06-05 21:59:37,590 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 473.1ms TimeCoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:59:37,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-06-05 21:59:37,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 176. [2021-06-05 21:59:37,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.1085714285714285) internal successors, (369), 175 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:37,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 369 transitions. [2021-06-05 21:59:37,591 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 369 transitions. Word has length 20 [2021-06-05 21:59:37,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:37,591 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 369 transitions. [2021-06-05 21:59:37,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:37,592 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 369 transitions. [2021-06-05 21:59:37,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:37,592 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:37,592 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:37,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 626 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3265 [2021-06-05 21:59:37,792 INFO L430 AbstractCegarLoop]: === Iteration 632 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:37,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:37,792 INFO L82 PathProgramCache]: Analyzing trace with hash 912632170, now seen corresponding path program 626 times [2021-06-05 21:59:37,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:37,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539687038] [2021-06-05 21:59:37,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:37,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:38,103 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:38,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:38,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539687038] [2021-06-05 21:59:38,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539687038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:38,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502233337] [2021-06-05 21:59:38,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 627 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 627 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:38,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:59:38,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:38,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:59:38,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:38,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:38,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:38,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:38,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:38,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:38,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:59:38,420 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:59:38,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:38,429 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:59:38,429 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2021-06-05 21:59:38,477 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:38,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502233337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:38,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:38,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:59:38,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218127102] [2021-06-05 21:59:38,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:59:38,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:38,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:59:38,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:59:38,478 INFO L87 Difference]: Start difference. First operand 176 states and 369 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:38,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:38,902 INFO L93 Difference]: Finished difference Result 205 states and 418 transitions. [2021-06-05 21:59:38,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:59:38,903 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:38,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:38,903 INFO L225 Difference]: With dead ends: 205 [2021-06-05 21:59:38,903 INFO L226 Difference]: Without dead ends: 198 [2021-06-05 21:59:38,903 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 652.4ms TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:59:38,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-06-05 21:59:38,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 177. [2021-06-05 21:59:38,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.1136363636363638) internal successors, (372), 176 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:38,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 372 transitions. [2021-06-05 21:59:38,905 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 372 transitions. Word has length 20 [2021-06-05 21:59:38,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:38,905 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 372 transitions. [2021-06-05 21:59:38,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:38,905 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 372 transitions. [2021-06-05 21:59:38,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:38,905 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:38,905 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:39,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3268,627 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:39,106 INFO L430 AbstractCegarLoop]: === Iteration 633 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:39,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:39,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1774637234, now seen corresponding path program 627 times [2021-06-05 21:59:39,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:39,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95386521] [2021-06-05 21:59:39,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:39,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:39,341 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:39,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:39,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95386521] [2021-06-05 21:59:39,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95386521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:39,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576861900] [2021-06-05 21:59:39,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 628 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 628 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:39,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:59:39,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:39,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:39,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:39,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:39,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:39,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:39,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:39,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:39,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:39,703 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:39,728 INFO L628 ElimStorePlain]: treesize reduction 34, result has 45.2 percent of original size [2021-06-05 21:59:39,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:39,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:39,732 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:59:39,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:39,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:59:39,742 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 21:59:39,797 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:39,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576861900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:39,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:39,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:59:39,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697673132] [2021-06-05 21:59:39,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:59:39,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:39,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:59:39,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:59:39,798 INFO L87 Difference]: Start difference. First operand 177 states and 372 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:40,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:40,266 INFO L93 Difference]: Finished difference Result 213 states and 434 transitions. [2021-06-05 21:59:40,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:59:40,266 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:40,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:40,267 INFO L225 Difference]: With dead ends: 213 [2021-06-05 21:59:40,267 INFO L226 Difference]: Without dead ends: 200 [2021-06-05 21:59:40,267 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 701.5ms TimeCoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:59:40,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-06-05 21:59:40,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 178. [2021-06-05 21:59:40,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.1129943502824857) internal successors, (374), 177 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:40,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 374 transitions. [2021-06-05 21:59:40,268 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 374 transitions. Word has length 20 [2021-06-05 21:59:40,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:40,268 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 374 transitions. [2021-06-05 21:59:40,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:40,269 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 374 transitions. [2021-06-05 21:59:40,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:40,269 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:40,269 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:40,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 628 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3272 [2021-06-05 21:59:40,469 INFO L430 AbstractCegarLoop]: === Iteration 634 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:40,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:40,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1384144790, now seen corresponding path program 628 times [2021-06-05 21:59:40,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:40,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834947547] [2021-06-05 21:59:40,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:40,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:40,755 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:40,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:40,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834947547] [2021-06-05 21:59:40,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834947547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:40,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894973150] [2021-06-05 21:59:40,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 629 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 629 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:40,781 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:59:40,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:40,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:40,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:41,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:41,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:41,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:41,047 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:41,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:41,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:41,050 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:41,114 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-06-05 21:59:41,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:41,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:41,118 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:59:41,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:41,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:41,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:41,145 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:41,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:41,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:41,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:41,171 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:59:41,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:41,193 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:59:41,193 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 21:59:41,283 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:41,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894973150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:41,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:41,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:59:41,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72158628] [2021-06-05 21:59:41,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:59:41,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:41,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:59:41,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:59:41,283 INFO L87 Difference]: Start difference. First operand 178 states and 374 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:41,840 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2021-06-05 21:59:42,038 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2021-06-05 21:59:42,372 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2021-06-05 21:59:42,735 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2021-06-05 21:59:43,031 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-06-05 21:59:43,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:43,380 INFO L93 Difference]: Finished difference Result 386 states and 706 transitions. [2021-06-05 21:59:43,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 21:59:43,380 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:43,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:43,381 INFO L225 Difference]: With dead ends: 386 [2021-06-05 21:59:43,381 INFO L226 Difference]: Without dead ends: 339 [2021-06-05 21:59:43,381 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 2168.3ms TimeCoverageRelationStatistics Valid=247, Invalid=1645, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 21:59:43,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-06-05 21:59:43,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 183. [2021-06-05 21:59:43,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.1538461538461537) internal successors, (392), 182 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:43,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 392 transitions. [2021-06-05 21:59:43,383 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 392 transitions. Word has length 20 [2021-06-05 21:59:43,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:43,383 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 392 transitions. [2021-06-05 21:59:43,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:43,383 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 392 transitions. [2021-06-05 21:59:43,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:43,383 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:43,383 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:43,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 629 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3276 [2021-06-05 21:59:43,583 INFO L430 AbstractCegarLoop]: === Iteration 635 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:43,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:43,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1729663942, now seen corresponding path program 629 times [2021-06-05 21:59:43,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:43,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861094234] [2021-06-05 21:59:43,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:43,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:43,771 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:43,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:43,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861094234] [2021-06-05 21:59:43,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861094234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:43,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375525135] [2021-06-05 21:59:43,771 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 630 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 630 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:43,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:59:43,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:43,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:43,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:44,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:44,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:44,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:59:44,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:44,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:44,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:59:44,023 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:44,045 INFO L628 ElimStorePlain]: treesize reduction 40, result has 43.7 percent of original size [2021-06-05 21:59:44,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:44,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 21:59:44,048 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:44,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:44,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:59:44,056 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 21:59:44,101 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:44,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375525135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:44,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:44,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:59:44,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115707641] [2021-06-05 21:59:44,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:59:44,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:44,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:59:44,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:59:44,102 INFO L87 Difference]: Start difference. First operand 183 states and 392 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:44,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:44,347 INFO L93 Difference]: Finished difference Result 206 states and 428 transitions. [2021-06-05 21:59:44,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:59:44,348 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:44,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:44,348 INFO L225 Difference]: With dead ends: 206 [2021-06-05 21:59:44,348 INFO L226 Difference]: Without dead ends: 187 [2021-06-05 21:59:44,348 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 440.0ms TimeCoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:59:44,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-06-05 21:59:44,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 185. [2021-06-05 21:59:44,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.152173913043478) internal successors, (396), 184 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:44,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 396 transitions. [2021-06-05 21:59:44,349 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 396 transitions. Word has length 20 [2021-06-05 21:59:44,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:44,349 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 396 transitions. [2021-06-05 21:59:44,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:44,350 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 396 transitions. [2021-06-05 21:59:44,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:44,350 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:44,350 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:44,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3281,630 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:44,550 INFO L430 AbstractCegarLoop]: === Iteration 636 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:44,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:44,550 INFO L82 PathProgramCache]: Analyzing trace with hash -777310734, now seen corresponding path program 630 times [2021-06-05 21:59:44,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:44,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626575909] [2021-06-05 21:59:44,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:44,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:44,839 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:44,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:44,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626575909] [2021-06-05 21:59:44,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626575909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:44,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113584210] [2021-06-05 21:59:44,839 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 631 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 631 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:44,866 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:59:44,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:44,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:59:44,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:45,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:45,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:59:45,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:45,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:45,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:45,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 21:59:45,147 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:45,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:45,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:59:45,155 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-06-05 21:59:45,205 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:45,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113584210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:45,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:45,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:59:45,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982858089] [2021-06-05 21:59:45,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:59:45,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:45,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:59:45,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:59:45,206 INFO L87 Difference]: Start difference. First operand 185 states and 396 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:45,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:45,624 INFO L93 Difference]: Finished difference Result 204 states and 428 transitions. [2021-06-05 21:59:45,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:59:45,624 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:45,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:45,625 INFO L225 Difference]: With dead ends: 204 [2021-06-05 21:59:45,625 INFO L226 Difference]: Without dead ends: 197 [2021-06-05 21:59:45,625 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 683.6ms TimeCoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:59:45,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-06-05 21:59:45,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 186. [2021-06-05 21:59:45,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.156756756756757) internal successors, (399), 185 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:45,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 399 transitions. [2021-06-05 21:59:45,626 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 399 transitions. Word has length 20 [2021-06-05 21:59:45,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:45,627 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 399 transitions. [2021-06-05 21:59:45,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:45,627 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 399 transitions. [2021-06-05 21:59:45,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:45,627 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:45,627 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:45,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 631 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3285 [2021-06-05 21:59:45,827 INFO L430 AbstractCegarLoop]: === Iteration 637 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:45,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:45,827 INFO L82 PathProgramCache]: Analyzing trace with hash 84694330, now seen corresponding path program 631 times [2021-06-05 21:59:45,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:45,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702234165] [2021-06-05 21:59:45,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:45,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:46,037 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:46,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:46,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702234165] [2021-06-05 21:59:46,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702234165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:46,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652635165] [2021-06-05 21:59:46,038 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 632 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 632 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:46,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:46,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:46,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:46,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:46,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:46,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:59:46,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:46,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:46,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:59:46,375 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:46,402 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-06-05 21:59:46,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:46,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:59:46,406 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:59:46,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:46,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:59:46,415 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 21:59:46,469 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:46,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652635165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:46,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:46,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:59:46,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532183730] [2021-06-05 21:59:46,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:59:46,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:46,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:59:46,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:59:46,470 INFO L87 Difference]: Start difference. First operand 186 states and 399 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:46,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:46,962 INFO L93 Difference]: Finished difference Result 215 states and 449 transitions. [2021-06-05 21:59:46,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:59:46,962 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:46,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:46,962 INFO L225 Difference]: With dead ends: 215 [2021-06-05 21:59:46,962 INFO L226 Difference]: Without dead ends: 202 [2021-06-05 21:59:46,962 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 694.7ms TimeCoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:59:46,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-05 21:59:46,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 187. [2021-06-05 21:59:46,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.1559139784946235) internal successors, (401), 186 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:46,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 401 transitions. [2021-06-05 21:59:46,964 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 401 transitions. Word has length 20 [2021-06-05 21:59:46,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:46,964 INFO L482 AbstractCegarLoop]: Abstraction has 187 states and 401 transitions. [2021-06-05 21:59:46,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:46,964 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 401 transitions. [2021-06-05 21:59:46,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:46,964 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:46,964 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:47,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3288,632 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:47,165 INFO L430 AbstractCegarLoop]: === Iteration 638 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:47,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:47,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1220879602, now seen corresponding path program 632 times [2021-06-05 21:59:47,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:47,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98846959] [2021-06-05 21:59:47,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:47,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:47,372 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:47,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:47,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98846959] [2021-06-05 21:59:47,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98846959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:47,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135987201] [2021-06-05 21:59:47,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 633 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 633 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:47,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:59:47,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:47,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:59:47,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:47,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:47,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:47,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:47,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:47,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:47,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:59:47,656 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:59:47,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:47,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:47,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:47,681 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:47,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:47,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:47,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:59:47,704 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:59:47,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:47,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:59:47,724 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-06-05 21:59:47,807 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:47,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135987201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:47,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:47,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:59:47,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971396587] [2021-06-05 21:59:47,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:59:47,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:47,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:59:47,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:59:47,808 INFO L87 Difference]: Start difference. First operand 187 states and 401 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:48,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:48,356 INFO L93 Difference]: Finished difference Result 237 states and 485 transitions. [2021-06-05 21:59:48,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:59:48,356 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:48,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:48,357 INFO L225 Difference]: With dead ends: 237 [2021-06-05 21:59:48,357 INFO L226 Difference]: Without dead ends: 221 [2021-06-05 21:59:48,357 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 648.2ms TimeCoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:59:48,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-06-05 21:59:48,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 188. [2021-06-05 21:59:48,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.160427807486631) internal successors, (404), 187 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:48,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 404 transitions. [2021-06-05 21:59:48,359 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 404 transitions. Word has length 20 [2021-06-05 21:59:48,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:48,359 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 404 transitions. [2021-06-05 21:59:48,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:48,359 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 404 transitions. [2021-06-05 21:59:48,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:48,359 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:48,359 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:48,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 633 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3292 [2021-06-05 21:59:48,559 INFO L430 AbstractCegarLoop]: === Iteration 639 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:48,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:48,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1663109014, now seen corresponding path program 633 times [2021-06-05 21:59:48,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:48,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855543284] [2021-06-05 21:59:48,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:48,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:48,774 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:48,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:48,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855543284] [2021-06-05 21:59:48,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855543284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:48,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657699737] [2021-06-05 21:59:48,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 634 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 634 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:48,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:59:48,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:48,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:48,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:49,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:49,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:49,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:49,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:49,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:49,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:49,012 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:49,033 INFO L628 ElimStorePlain]: treesize reduction 37, result has 40.3 percent of original size [2021-06-05 21:59:49,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:49,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:59:49,036 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:59:49,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:49,044 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:59:49,044 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 21:59:49,085 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:49,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657699737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:49,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:49,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:59:49,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555197712] [2021-06-05 21:59:49,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:59:49,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:49,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:59:49,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:59:49,086 INFO L87 Difference]: Start difference. First operand 188 states and 404 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:49,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:49,333 INFO L93 Difference]: Finished difference Result 208 states and 435 transitions. [2021-06-05 21:59:49,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:59:49,334 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:49,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:49,334 INFO L225 Difference]: With dead ends: 208 [2021-06-05 21:59:49,334 INFO L226 Difference]: Without dead ends: 192 [2021-06-05 21:59:49,334 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 450.5ms TimeCoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:59:49,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-06-05 21:59:49,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 190. [2021-06-05 21:59:49,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.1587301587301586) internal successors, (408), 189 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:49,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 408 transitions. [2021-06-05 21:59:49,336 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 408 transitions. Word has length 20 [2021-06-05 21:59:49,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:49,336 INFO L482 AbstractCegarLoop]: Abstraction has 190 states and 408 transitions. [2021-06-05 21:59:49,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:49,336 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 408 transitions. [2021-06-05 21:59:49,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:49,336 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:49,336 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:49,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 634 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3297 [2021-06-05 21:59:49,536 INFO L430 AbstractCegarLoop]: === Iteration 640 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:49,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:49,537 INFO L82 PathProgramCache]: Analyzing trace with hash -801103950, now seen corresponding path program 634 times [2021-06-05 21:59:49,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:49,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344730184] [2021-06-05 21:59:49,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:49,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:49,736 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:49,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:49,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344730184] [2021-06-05 21:59:49,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344730184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:49,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602014385] [2021-06-05 21:59:49,736 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 635 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 635 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:49,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:59:49,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:49,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:49,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:49,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:49,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:49,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:59:49,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:49,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:49,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:59:50,000 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:50,022 INFO L628 ElimStorePlain]: treesize reduction 34, result has 47.7 percent of original size [2021-06-05 21:59:50,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:50,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 21:59:50,025 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:50,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:50,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:59:50,032 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 21:59:50,076 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:50,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602014385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:50,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:50,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:59:50,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136914820] [2021-06-05 21:59:50,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:59:50,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:50,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:59:50,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:59:50,077 INFO L87 Difference]: Start difference. First operand 190 states and 408 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:50,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:50,444 INFO L93 Difference]: Finished difference Result 209 states and 441 transitions. [2021-06-05 21:59:50,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:59:50,444 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:50,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:50,444 INFO L225 Difference]: With dead ends: 209 [2021-06-05 21:59:50,444 INFO L226 Difference]: Without dead ends: 196 [2021-06-05 21:59:50,444 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 554.0ms TimeCoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:59:50,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-06-05 21:59:50,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 191. [2021-06-05 21:59:50,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.1578947368421053) internal successors, (410), 190 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:50,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 410 transitions. [2021-06-05 21:59:50,446 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 410 transitions. Word has length 20 [2021-06-05 21:59:50,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:50,446 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 410 transitions. [2021-06-05 21:59:50,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:50,446 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 410 transitions. [2021-06-05 21:59:50,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:50,446 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:50,446 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:50,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3301,635 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:50,657 INFO L430 AbstractCegarLoop]: === Iteration 641 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:50,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:50,657 INFO L82 PathProgramCache]: Analyzing trace with hash 335081322, now seen corresponding path program 635 times [2021-06-05 21:59:50,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:50,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118528244] [2021-06-05 21:59:50,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:50,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:50,882 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:50,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:50,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118528244] [2021-06-05 21:59:50,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118528244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:50,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528906397] [2021-06-05 21:59:50,883 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 636 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 636 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:50,912 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:59:50,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:50,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:50,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:51,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:51,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:51,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:51,113 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:51,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:51,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:51,116 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:51,179 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-06-05 21:59:51,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:51,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:59:51,183 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:59:51,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:51,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:51,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:51,210 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:51,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:51,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:51,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:51,238 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:59:51,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:51,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:59:51,260 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 21:59:51,347 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:51,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528906397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:51,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:51,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:59:51,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277192670] [2021-06-05 21:59:51,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:59:51,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:51,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:59:51,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:59:51,348 INFO L87 Difference]: Start difference. First operand 191 states and 410 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:51,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:51,834 INFO L93 Difference]: Finished difference Result 231 states and 474 transitions. [2021-06-05 21:59:51,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:59:51,834 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:51,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:51,835 INFO L225 Difference]: With dead ends: 231 [2021-06-05 21:59:51,835 INFO L226 Difference]: Without dead ends: 212 [2021-06-05 21:59:51,835 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 668.6ms TimeCoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:59:51,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-06-05 21:59:51,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 188. [2021-06-05 21:59:51,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.160427807486631) internal successors, (404), 187 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:51,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 404 transitions. [2021-06-05 21:59:51,836 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 404 transitions. Word has length 20 [2021-06-05 21:59:51,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:51,837 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 404 transitions. [2021-06-05 21:59:51,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:51,837 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 404 transitions. [2021-06-05 21:59:51,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:51,837 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:51,837 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:52,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3304,636 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:52,037 INFO L430 AbstractCegarLoop]: === Iteration 642 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:52,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:52,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1716680882, now seen corresponding path program 636 times [2021-06-05 21:59:52,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:52,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748707804] [2021-06-05 21:59:52,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:52,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:52,251 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:52,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:52,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748707804] [2021-06-05 21:59:52,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748707804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:52,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065587219] [2021-06-05 21:59:52,251 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 637 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 637 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:52,286 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:59:52,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:52,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:59:52,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:52,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:52,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:52,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:52,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:52,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:52,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:52,540 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:59:52,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:52,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:59:52,548 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2021-06-05 21:59:52,598 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:52,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065587219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:52,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:52,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:59:52,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48702321] [2021-06-05 21:59:52,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:59:52,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:52,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:59:52,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:59:52,599 INFO L87 Difference]: Start difference. First operand 188 states and 404 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:52,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:52,836 INFO L93 Difference]: Finished difference Result 210 states and 441 transitions. [2021-06-05 21:59:52,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:59:52,836 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:52,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:52,836 INFO L225 Difference]: With dead ends: 210 [2021-06-05 21:59:52,836 INFO L226 Difference]: Without dead ends: 203 [2021-06-05 21:59:52,836 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 455.9ms TimeCoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:59:52,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-06-05 21:59:52,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 189. [2021-06-05 21:59:52,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.1648936170212765) internal successors, (407), 188 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:52,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 407 transitions. [2021-06-05 21:59:52,838 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 407 transitions. Word has length 20 [2021-06-05 21:59:52,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:52,838 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 407 transitions. [2021-06-05 21:59:52,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:52,838 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 407 transitions. [2021-06-05 21:59:52,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:52,838 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:52,838 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:53,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3309,637 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:53,039 INFO L430 AbstractCegarLoop]: === Iteration 643 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:53,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:53,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1625933206, now seen corresponding path program 637 times [2021-06-05 21:59:53,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:53,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306340868] [2021-06-05 21:59:53,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:53,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:53,282 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:53,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:53,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306340868] [2021-06-05 21:59:53,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306340868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:53,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072014956] [2021-06-05 21:59:53,282 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 638 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 21:59:53,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 638 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:53,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:53,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:53,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:53,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:53,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:59:53,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:53,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:53,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:59:53,558 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:53,580 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-06-05 21:59:53,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:53,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:59:53,585 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:59:53,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:53,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:59:53,597 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 21:59:53,644 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:53,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072014956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:53,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:53,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:59:53,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288885639] [2021-06-05 21:59:53,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:59:53,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:53,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:59:53,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:59:53,645 INFO L87 Difference]: Start difference. First operand 189 states and 407 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:53,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:53,995 INFO L93 Difference]: Finished difference Result 214 states and 446 transitions. [2021-06-05 21:59:53,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:59:53,995 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:53,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:53,995 INFO L225 Difference]: With dead ends: 214 [2021-06-05 21:59:53,995 INFO L226 Difference]: Without dead ends: 198 [2021-06-05 21:59:53,995 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 562.2ms TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:59:53,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-06-05 21:59:53,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 190. [2021-06-05 21:59:53,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.164021164021164) internal successors, (409), 189 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:53,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 409 transitions. [2021-06-05 21:59:53,997 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 409 transitions. Word has length 20 [2021-06-05 21:59:53,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:53,997 INFO L482 AbstractCegarLoop]: Abstraction has 190 states and 409 transitions. [2021-06-05 21:59:53,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:53,997 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 409 transitions. [2021-06-05 21:59:53,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:53,997 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:53,997 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:54,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3313,638 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:54,198 INFO L430 AbstractCegarLoop]: === Iteration 644 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:54,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:54,198 INFO L82 PathProgramCache]: Analyzing trace with hash -763928142, now seen corresponding path program 638 times [2021-06-05 21:59:54,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:54,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366461257] [2021-06-05 21:59:54,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:54,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:54,505 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:54,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:54,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366461257] [2021-06-05 21:59:54,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366461257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:54,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427069272] [2021-06-05 21:59:54,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 639 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 639 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:54,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:59:54,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:54,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:59:54,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:54,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:54,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:59:54,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:54,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:54,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:54,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:59:54,836 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:59:54,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:54,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:59:54,844 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-06-05 21:59:54,894 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:54,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427069272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:54,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:54,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:59:54,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261520568] [2021-06-05 21:59:54,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:59:54,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:54,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:59:54,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:59:54,895 INFO L87 Difference]: Start difference. First operand 190 states and 409 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:55,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:55,356 INFO L93 Difference]: Finished difference Result 216 states and 453 transitions. [2021-06-05 21:59:55,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:59:55,356 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:55,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:55,356 INFO L225 Difference]: With dead ends: 216 [2021-06-05 21:59:55,356 INFO L226 Difference]: Without dead ends: 209 [2021-06-05 21:59:55,357 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 726.1ms TimeCoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:59:55,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-06-05 21:59:55,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 191. [2021-06-05 21:59:55,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.168421052631579) internal successors, (412), 190 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:55,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 412 transitions. [2021-06-05 21:59:55,358 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 412 transitions. Word has length 20 [2021-06-05 21:59:55,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:55,358 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 412 transitions. [2021-06-05 21:59:55,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:55,358 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 412 transitions. [2021-06-05 21:59:55,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:55,359 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:55,359 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:55,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3316,639 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:55,559 INFO L430 AbstractCegarLoop]: === Iteration 645 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:55,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:55,559 INFO L82 PathProgramCache]: Analyzing trace with hash 372257130, now seen corresponding path program 639 times [2021-06-05 21:59:55,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:55,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301018416] [2021-06-05 21:59:55,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:55,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:55,834 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:55,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:55,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301018416] [2021-06-05 21:59:55,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301018416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:55,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834028280] [2021-06-05 21:59:55,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 640 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 640 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:55,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:59:55,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:55,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 21:59:55,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:56,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:56,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:56,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:56,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:56,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:56,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:59:56,144 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:59:56,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:56,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:56,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:56,172 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:56,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:56,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:56,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 21:59:56,198 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:59:56,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:56,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 21:59:56,219 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-06-05 21:59:56,310 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:56,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834028280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:56,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:56,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:59:56,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728358382] [2021-06-05 21:59:56,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:59:56,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:56,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:59:56,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:59:56,311 INFO L87 Difference]: Start difference. First operand 191 states and 412 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:57,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:57,000 INFO L93 Difference]: Finished difference Result 244 states and 501 transitions. [2021-06-05 21:59:57,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:59:57,000 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:57,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:57,000 INFO L225 Difference]: With dead ends: 244 [2021-06-05 21:59:57,000 INFO L226 Difference]: Without dead ends: 228 [2021-06-05 21:59:57,001 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 903.5ms TimeCoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:59:57,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-06-05 21:59:57,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 191. [2021-06-05 21:59:57,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.168421052631579) internal successors, (412), 190 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:57,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 412 transitions. [2021-06-05 21:59:57,002 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 412 transitions. Word has length 20 [2021-06-05 21:59:57,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:57,002 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 412 transitions. [2021-06-05 21:59:57,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:57,002 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 412 transitions. [2021-06-05 21:59:57,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:57,003 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:57,003 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:57,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 640 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3320 [2021-06-05 21:59:57,203 INFO L430 AbstractCegarLoop]: === Iteration 646 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:57,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:57,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1783235810, now seen corresponding path program 640 times [2021-06-05 21:59:57,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:57,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183564757] [2021-06-05 21:59:57,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:57,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:57,409 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:57,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:57,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183564757] [2021-06-05 21:59:57,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183564757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:57,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930045612] [2021-06-05 21:59:57,409 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 641 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 641 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:57,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:59:57,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:57,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:57,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:57,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:57,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:57,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:57,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:57,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:57,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 21:59:57,674 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:57,697 INFO L628 ElimStorePlain]: treesize reduction 34, result has 45.2 percent of original size [2021-06-05 21:59:57,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:57,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 21:59:57,701 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 21:59:57,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:57,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:59:57,710 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 21:59:57,757 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:57,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930045612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:57,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:57,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:59:57,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231221086] [2021-06-05 21:59:57,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:59:57,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:57,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:59:57,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:59:57,758 INFO L87 Difference]: Start difference. First operand 191 states and 412 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:58,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:58,093 INFO L93 Difference]: Finished difference Result 210 states and 441 transitions. [2021-06-05 21:59:58,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:59:58,094 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:58,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:58,094 INFO L225 Difference]: With dead ends: 210 [2021-06-05 21:59:58,094 INFO L226 Difference]: Without dead ends: 194 [2021-06-05 21:59:58,094 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 505.5ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:59:58,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-06-05 21:59:58,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 192. [2021-06-05 21:59:58,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.167539267015707) internal successors, (414), 191 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:58,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 414 transitions. [2021-06-05 21:59:58,096 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 414 transitions. Word has length 20 [2021-06-05 21:59:58,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:58,096 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 414 transitions. [2021-06-05 21:59:58,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:58,096 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 414 transitions. [2021-06-05 21:59:58,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:58,096 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:58,096 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:58,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3325,641 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:58,297 INFO L430 AbstractCegarLoop]: === Iteration 647 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:58,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:58,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1649726422, now seen corresponding path program 641 times [2021-06-05 21:59:58,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:58,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812681197] [2021-06-05 21:59:58,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:58,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:58,525 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:58,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:58,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812681197] [2021-06-05 21:59:58,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812681197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:58,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386760360] [2021-06-05 21:59:58,525 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 642 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 642 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:58,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:59:58,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:58,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:58,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:59:58,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:58,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:58,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:59:58,807 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:58,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:58,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 21:59:58,810 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:58,835 INFO L628 ElimStorePlain]: treesize reduction 34, result has 47.7 percent of original size [2021-06-05 21:59:58,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 21:59:58,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 21:59:58,838 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 21:59:58,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:59:58,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:59:58,847 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 21:59:58,897 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:58,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386760360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:58,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:59:58,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 21:59:58,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260169549] [2021-06-05 21:59:58,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 21:59:58,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:59:58,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 21:59:58,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:59:58,898 INFO L87 Difference]: Start difference. First operand 192 states and 414 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:59,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:59:59,377 INFO L93 Difference]: Finished difference Result 211 states and 447 transitions. [2021-06-05 21:59:59,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:59:59,378 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:59:59,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:59:59,378 INFO L225 Difference]: With dead ends: 211 [2021-06-05 21:59:59,378 INFO L226 Difference]: Without dead ends: 198 [2021-06-05 21:59:59,378 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 718.7ms TimeCoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:59:59,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-06-05 21:59:59,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 193. [2021-06-05 21:59:59,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.1666666666666665) internal successors, (416), 192 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:59,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 416 transitions. [2021-06-05 21:59:59,380 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 416 transitions. Word has length 20 [2021-06-05 21:59:59,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:59:59,380 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 416 transitions. [2021-06-05 21:59:59,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:59:59,380 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 416 transitions. [2021-06-05 21:59:59,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:59:59,380 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:59:59,380 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:59:59,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3329,642 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:59,580 INFO L430 AbstractCegarLoop]: === Iteration 648 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:59:59,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:59:59,580 INFO L82 PathProgramCache]: Analyzing trace with hash -513541150, now seen corresponding path program 642 times [2021-06-05 21:59:59,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:59:59,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195563615] [2021-06-05 21:59:59,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:59:59,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:59:59,819 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:59:59,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:59:59,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195563615] [2021-06-05 21:59:59,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195563615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:59:59,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519843141] [2021-06-05 21:59:59,819 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 643 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 643 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:59:59,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:59:59,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:59:59,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:59:59,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:00,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:00,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:00,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:00,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:00,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:00,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:00,055 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:00,116 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-06-05 22:00:00,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:00,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:00:00,125 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:00,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:00,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:00,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:00,156 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:00,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:00,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:00,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:00:00,182 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:00,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:00,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:00:00,204 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:00:00,290 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:00,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519843141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:00,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:00,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:00,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693995601] [2021-06-05 22:00:00,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:00,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:00,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:00,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:00,291 INFO L87 Difference]: Start difference. First operand 193 states and 416 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:00,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:00,733 INFO L93 Difference]: Finished difference Result 211 states and 445 transitions. [2021-06-05 22:00:00,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:00:00,733 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:00,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:00,734 INFO L225 Difference]: With dead ends: 211 [2021-06-05 22:00:00,734 INFO L226 Difference]: Without dead ends: 199 [2021-06-05 22:00:00,734 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 635.2ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:00:00,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-05 22:00:00,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 190. [2021-06-05 22:00:00,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.1693121693121693) internal successors, (410), 189 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:00,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 410 transitions. [2021-06-05 22:00:00,735 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 410 transitions. Word has length 20 [2021-06-05 22:00:00,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:00,735 INFO L482 AbstractCegarLoop]: Abstraction has 190 states and 410 transitions. [2021-06-05 22:00:00,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:00,735 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 410 transitions. [2021-06-05 22:00:00,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:00,736 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:00,736 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:00,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3333,643 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:00,936 INFO L430 AbstractCegarLoop]: === Iteration 649 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:00,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:00,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1696778674, now seen corresponding path program 643 times [2021-06-05 22:00:00,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:00,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345115525] [2021-06-05 22:00:00,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:00,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:01,078 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:01,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:01,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345115525] [2021-06-05 22:00:01,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345115525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:01,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143368619] [2021-06-05 22:00:01,079 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 644 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 644 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:01,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:01,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:00:01,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:01,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:01,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:01,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:00:01,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:01,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:01,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:00:01,326 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:01,349 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-06-05 22:00:01,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:01,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:00:01,352 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:01,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:01,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:00:01,360 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 22:00:01,401 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:01,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143368619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:01,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:01,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:00:01,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910530148] [2021-06-05 22:00:01,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:00:01,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:01,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:00:01,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:00:01,402 INFO L87 Difference]: Start difference. First operand 190 states and 410 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:01,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:01,776 INFO L93 Difference]: Finished difference Result 224 states and 473 transitions. [2021-06-05 22:00:01,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:00:01,776 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:01,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:01,777 INFO L225 Difference]: With dead ends: 224 [2021-06-05 22:00:01,777 INFO L226 Difference]: Without dead ends: 205 [2021-06-05 22:00:01,777 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 463.2ms TimeCoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:00:01,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-05 22:00:01,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 192. [2021-06-05 22:00:01,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.167539267015707) internal successors, (414), 191 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:01,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 414 transitions. [2021-06-05 22:00:01,778 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 414 transitions. Word has length 20 [2021-06-05 22:00:01,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:01,778 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 414 transitions. [2021-06-05 22:00:01,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:01,779 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 414 transitions. [2021-06-05 22:00:01,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:01,779 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:01,779 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:01,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3338,644 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:01,981 INFO L430 AbstractCegarLoop]: === Iteration 650 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:01,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:01,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1645835414, now seen corresponding path program 644 times [2021-06-05 22:00:01,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:01,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9654152] [2021-06-05 22:00:01,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:01,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:02,194 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:02,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:02,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9654152] [2021-06-05 22:00:02,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9654152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:02,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289913968] [2021-06-05 22:00:02,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 645 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 645 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:02,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:00:02,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:02,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:00:02,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:02,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:02,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:02,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:02,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:02,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:02,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:00:02,507 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:02,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:02,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:00:02,514 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2021-06-05 22:00:02,558 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:02,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289913968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:02,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:02,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:02,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843884594] [2021-06-05 22:00:02,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:02,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:02,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:02,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:02,559 INFO L87 Difference]: Start difference. First operand 192 states and 414 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:02,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:02,920 INFO L93 Difference]: Finished difference Result 211 states and 446 transitions. [2021-06-05 22:00:02,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:00:02,920 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:02,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:02,920 INFO L225 Difference]: With dead ends: 211 [2021-06-05 22:00:02,920 INFO L226 Difference]: Without dead ends: 204 [2021-06-05 22:00:02,920 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 537.8ms TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:00:02,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-06-05 22:00:02,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 193. [2021-06-05 22:00:02,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.171875) internal successors, (417), 192 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:02,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 417 transitions. [2021-06-05 22:00:02,922 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 417 transitions. Word has length 20 [2021-06-05 22:00:02,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:02,922 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 417 transitions. [2021-06-05 22:00:02,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:02,922 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 417 transitions. [2021-06-05 22:00:02,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:02,922 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:02,922 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:03,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 645 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3342 [2021-06-05 22:00:03,123 INFO L430 AbstractCegarLoop]: === Iteration 651 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:03,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:03,123 INFO L82 PathProgramCache]: Analyzing trace with hash -783830350, now seen corresponding path program 645 times [2021-06-05 22:00:03,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:03,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380032772] [2021-06-05 22:00:03,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:03,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:03,314 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:03,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:03,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380032772] [2021-06-05 22:00:03,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380032772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:03,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288682318] [2021-06-05 22:00:03,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 646 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 646 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:03,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:00:03,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:03,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:00:03,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:03,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:03,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:03,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:03,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:03,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:03,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:03,613 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:03,634 INFO L628 ElimStorePlain]: treesize reduction 34, result has 45.2 percent of original size [2021-06-05 22:00:03,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:03,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:00:03,638 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:03,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:03,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:00:03,646 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 22:00:03,693 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:03,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288682318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:03,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:03,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:03,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084134798] [2021-06-05 22:00:03,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:03,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:03,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:03,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:03,694 INFO L87 Difference]: Start difference. First operand 193 states and 417 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:04,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:04,247 INFO L93 Difference]: Finished difference Result 223 states and 469 transitions. [2021-06-05 22:00:04,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:00:04,247 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:04,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:04,247 INFO L225 Difference]: With dead ends: 223 [2021-06-05 22:00:04,247 INFO L226 Difference]: Without dead ends: 210 [2021-06-05 22:00:04,247 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 632.1ms TimeCoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:00:04,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-06-05 22:00:04,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 194. [2021-06-05 22:00:04,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.1709844559585494) internal successors, (419), 193 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:04,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 419 transitions. [2021-06-05 22:00:04,249 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 419 transitions. Word has length 20 [2021-06-05 22:00:04,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:04,249 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 419 transitions. [2021-06-05 22:00:04,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:04,249 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 419 transitions. [2021-06-05 22:00:04,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:04,249 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:04,249 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:04,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3345,646 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:04,450 INFO L430 AbstractCegarLoop]: === Iteration 652 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:04,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:04,450 INFO L82 PathProgramCache]: Analyzing trace with hash 352354922, now seen corresponding path program 646 times [2021-06-05 22:00:04,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:04,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177375125] [2021-06-05 22:00:04,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:04,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:04,705 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:04,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:04,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177375125] [2021-06-05 22:00:04,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177375125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:04,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353015443] [2021-06-05 22:00:04,705 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 647 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 647 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:04,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:00:04,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:04,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:00:04,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:04,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:04,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:04,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:04,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:04,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:04,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:04,969 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:05,038 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-06-05 22:00:05,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:05,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:05,042 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:05,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:05,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:05,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:00:05,068 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:05,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:05,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:05,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:00:05,095 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:05,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:05,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:00:05,118 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:00:05,203 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:05,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353015443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:05,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:05,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:00:05,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195517739] [2021-06-05 22:00:05,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:00:05,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:05,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:00:05,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:00:05,204 INFO L87 Difference]: Start difference. First operand 194 states and 419 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:05,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:05,788 INFO L93 Difference]: Finished difference Result 246 states and 504 transitions. [2021-06-05 22:00:05,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:00:05,788 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:05,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:05,788 INFO L225 Difference]: With dead ends: 246 [2021-06-05 22:00:05,788 INFO L226 Difference]: Without dead ends: 227 [2021-06-05 22:00:05,789 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 757.8ms TimeCoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:00:05,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-06-05 22:00:05,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 193. [2021-06-05 22:00:05,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.171875) internal successors, (417), 192 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:05,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 417 transitions. [2021-06-05 22:00:05,790 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 417 transitions. Word has length 20 [2021-06-05 22:00:05,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:05,790 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 417 transitions. [2021-06-05 22:00:05,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:05,790 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 417 transitions. [2021-06-05 22:00:05,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:05,791 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:05,791 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:05,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3349,647 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:05,991 INFO L430 AbstractCegarLoop]: === Iteration 653 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:05,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:05,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1763333602, now seen corresponding path program 647 times [2021-06-05 22:00:05,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:05,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651509382] [2021-06-05 22:00:05,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:05,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:06,217 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:06,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:06,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651509382] [2021-06-05 22:00:06,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651509382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:06,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401465099] [2021-06-05 22:00:06,217 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 648 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 648 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:06,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:00:06,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:06,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:00:06,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:06,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:06,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:06,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:06,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:06,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:06,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:06,471 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:06,492 INFO L628 ElimStorePlain]: treesize reduction 34, result has 45.2 percent of original size [2021-06-05 22:00:06,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:06,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:00:06,496 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:06,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:06,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:00:06,504 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 22:00:06,543 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:06,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401465099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:06,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:06,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:00:06,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419878780] [2021-06-05 22:00:06,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:00:06,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:06,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:00:06,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:00:06,544 INFO L87 Difference]: Start difference. First operand 193 states and 417 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:06,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:06,865 INFO L93 Difference]: Finished difference Result 213 states and 448 transitions. [2021-06-05 22:00:06,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:00:06,866 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:06,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:06,866 INFO L225 Difference]: With dead ends: 213 [2021-06-05 22:00:06,866 INFO L226 Difference]: Without dead ends: 197 [2021-06-05 22:00:06,866 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 505.6ms TimeCoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:00:06,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-06-05 22:00:06,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 195. [2021-06-05 22:00:06,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.170103092783505) internal successors, (421), 194 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:06,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 421 transitions. [2021-06-05 22:00:06,867 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 421 transitions. Word has length 20 [2021-06-05 22:00:06,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:06,868 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 421 transitions. [2021-06-05 22:00:06,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:06,868 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 421 transitions. [2021-06-05 22:00:06,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:06,868 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:06,868 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:07,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3354,648 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:07,068 INFO L430 AbstractCegarLoop]: === Iteration 654 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:07,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:07,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1669628630, now seen corresponding path program 648 times [2021-06-05 22:00:07,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:07,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830975879] [2021-06-05 22:00:07,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:07,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:07,305 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 7 [2021-06-05 22:00:07,534 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:07,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:07,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830975879] [2021-06-05 22:00:07,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830975879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:07,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158673417] [2021-06-05 22:00:07,534 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 649 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 649 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:07,561 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:00:07,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:07,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:00:07,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:07,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:07,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:07,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:00:07,804 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:07,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:07,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:00:07,807 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:07,832 INFO L628 ElimStorePlain]: treesize reduction 40, result has 43.7 percent of original size [2021-06-05 22:00:07,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:07,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:00:07,836 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:07,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:07,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:00:07,843 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 22:00:07,890 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:07,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158673417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:07,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:07,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:07,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35595398] [2021-06-05 22:00:07,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:07,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:07,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:07,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:07,891 INFO L87 Difference]: Start difference. First operand 195 states and 421 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:08,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:08,531 INFO L93 Difference]: Finished difference Result 215 states and 456 transitions. [2021-06-05 22:00:08,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:00:08,532 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:08,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:08,532 INFO L225 Difference]: With dead ends: 215 [2021-06-05 22:00:08,532 INFO L226 Difference]: Without dead ends: 202 [2021-06-05 22:00:08,532 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 973.6ms TimeCoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:00:08,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-05 22:00:08,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 196. [2021-06-05 22:00:08,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.169230769230769) internal successors, (423), 195 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:08,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 423 transitions. [2021-06-05 22:00:08,534 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 423 transitions. Word has length 20 [2021-06-05 22:00:08,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:08,534 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 423 transitions. [2021-06-05 22:00:08,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:08,534 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 423 transitions. [2021-06-05 22:00:08,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:08,534 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:08,534 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:08,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3357,649 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:08,735 INFO L430 AbstractCegarLoop]: === Iteration 655 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:08,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:08,735 INFO L82 PathProgramCache]: Analyzing trace with hash -533443358, now seen corresponding path program 649 times [2021-06-05 22:00:08,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:08,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764143389] [2021-06-05 22:00:08,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:08,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:08,911 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:08,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:08,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764143389] [2021-06-05 22:00:08,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764143389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:08,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39124179] [2021-06-05 22:00:08,911 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 650 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 650 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:08,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:08,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:00:08,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:09,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:09,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:09,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:09,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:09,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:09,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:09,155 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:09,219 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-06-05 22:00:09,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:09,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:00:09,223 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:09,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:09,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:09,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:09,250 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:09,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:09,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:09,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:00:09,275 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:09,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:09,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:00:09,301 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:00:09,379 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:09,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39124179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:09,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:09,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:00:09,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540783441] [2021-06-05 22:00:09,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:00:09,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:09,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:00:09,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:00:09,380 INFO L87 Difference]: Start difference. First operand 196 states and 423 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:09,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:09,925 INFO L93 Difference]: Finished difference Result 216 states and 456 transitions. [2021-06-05 22:00:09,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:00:09,925 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:09,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:09,926 INFO L225 Difference]: With dead ends: 216 [2021-06-05 22:00:09,926 INFO L226 Difference]: Without dead ends: 204 [2021-06-05 22:00:09,926 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 601.3ms TimeCoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:00:09,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-06-05 22:00:09,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 194. [2021-06-05 22:00:09,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.1709844559585494) internal successors, (419), 193 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:09,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 419 transitions. [2021-06-05 22:00:09,927 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 419 transitions. Word has length 20 [2021-06-05 22:00:09,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:09,927 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 419 transitions. [2021-06-05 22:00:09,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:09,927 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 419 transitions. [2021-06-05 22:00:09,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:09,928 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:09,928 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:10,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 650 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3360 [2021-06-05 22:00:10,128 INFO L430 AbstractCegarLoop]: === Iteration 656 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:10,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:10,128 INFO L82 PathProgramCache]: Analyzing trace with hash 518554546, now seen corresponding path program 650 times [2021-06-05 22:00:10,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:10,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375774427] [2021-06-05 22:00:10,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:10,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:10,331 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:10,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:10,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375774427] [2021-06-05 22:00:10,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375774427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:10,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250295845] [2021-06-05 22:00:10,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 651 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 651 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:10,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:00:10,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:10,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:00:10,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:10,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:10,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:00:10,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:10,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:10,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:10,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:00:10,582 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:10,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:10,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:00:10,588 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-06-05 22:00:10,626 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:10,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250295845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:10,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:10,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:00:10,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667323073] [2021-06-05 22:00:10,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:00:10,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:10,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:00:10,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:00:10,626 INFO L87 Difference]: Start difference. First operand 194 states and 419 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:11,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:11,033 INFO L93 Difference]: Finished difference Result 219 states and 467 transitions. [2021-06-05 22:00:11,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:00:11,033 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:11,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:11,033 INFO L225 Difference]: With dead ends: 219 [2021-06-05 22:00:11,033 INFO L226 Difference]: Without dead ends: 212 [2021-06-05 22:00:11,033 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 485.8ms TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:00:11,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-06-05 22:00:11,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 196. [2021-06-05 22:00:11,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.174358974358974) internal successors, (424), 195 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:11,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 424 transitions. [2021-06-05 22:00:11,035 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 424 transitions. Word has length 20 [2021-06-05 22:00:11,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:11,035 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 424 transitions. [2021-06-05 22:00:11,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:11,035 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 424 transitions. [2021-06-05 22:00:11,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:11,035 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:11,035 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:11,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3365,651 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:11,236 INFO L430 AbstractCegarLoop]: === Iteration 657 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:11,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:11,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1654739818, now seen corresponding path program 651 times [2021-06-05 22:00:11,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:11,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255172966] [2021-06-05 22:00:11,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:11,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:11,408 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:11,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:11,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255172966] [2021-06-05 22:00:11,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255172966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:11,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028216287] [2021-06-05 22:00:11,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 652 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 652 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:11,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:00:11,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:11,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:00:11,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:11,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:11,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:11,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:11,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:11,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:11,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:11,605 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:11,667 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-06-05 22:00:11,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:11,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:00:11,671 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:11,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:11,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:11,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:11,699 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:11,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:11,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:11,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:00:11,729 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:11,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:11,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:00:11,751 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:00:11,830 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:11,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028216287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:11,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:11,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:00:11,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934524983] [2021-06-05 22:00:11,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:00:11,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:11,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:00:11,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:00:11,831 INFO L87 Difference]: Start difference. First operand 196 states and 424 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:12,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:12,209 INFO L93 Difference]: Finished difference Result 225 states and 473 transitions. [2021-06-05 22:00:12,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:00:12,209 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:12,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:12,209 INFO L225 Difference]: With dead ends: 225 [2021-06-05 22:00:12,209 INFO L226 Difference]: Without dead ends: 213 [2021-06-05 22:00:12,210 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 466.0ms TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:00:12,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-06-05 22:00:12,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 196. [2021-06-05 22:00:12,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.174358974358974) internal successors, (424), 195 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:12,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 424 transitions. [2021-06-05 22:00:12,211 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 424 transitions. Word has length 20 [2021-06-05 22:00:12,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:12,211 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 424 transitions. [2021-06-05 22:00:12,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:12,212 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 424 transitions. [2021-06-05 22:00:12,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:12,212 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:12,212 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:12,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 652 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3369 [2021-06-05 22:00:12,412 INFO L430 AbstractCegarLoop]: === Iteration 658 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:12,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:12,412 INFO L82 PathProgramCache]: Analyzing trace with hash -491430942, now seen corresponding path program 652 times [2021-06-05 22:00:12,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:12,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19892456] [2021-06-05 22:00:12,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:12,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:12,686 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:12,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:12,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19892456] [2021-06-05 22:00:12,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19892456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:12,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401272831] [2021-06-05 22:00:12,686 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 653 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 653 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:12,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:00:12,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:12,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:00:12,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:12,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:12,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:12,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:12,892 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:12,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:12,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:12,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:12,896 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:12,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:12,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:12,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:12,900 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:12,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:12,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:12,904 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:12,970 INFO L628 ElimStorePlain]: treesize reduction 80, result has 44.4 percent of original size [2021-06-05 22:00:12,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:12,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:12,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:00:12,976 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:12,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:12,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:00:12,980 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:13,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:13,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:00:13,009 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 22:00:13,100 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:13,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401272831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:13,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:13,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:13,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045241391] [2021-06-05 22:00:13,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:13,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:13,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:13,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:13,101 INFO L87 Difference]: Start difference. First operand 196 states and 424 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:13,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:13,711 INFO L93 Difference]: Finished difference Result 249 states and 519 transitions. [2021-06-05 22:00:13,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:00:13,711 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:13,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:13,711 INFO L225 Difference]: With dead ends: 249 [2021-06-05 22:00:13,711 INFO L226 Difference]: Without dead ends: 230 [2021-06-05 22:00:13,712 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 735.9ms TimeCoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:00:13,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-06-05 22:00:13,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 196. [2021-06-05 22:00:13,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.174358974358974) internal successors, (424), 195 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:13,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 424 transitions. [2021-06-05 22:00:13,713 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 424 transitions. Word has length 20 [2021-06-05 22:00:13,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:13,713 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 424 transitions. [2021-06-05 22:00:13,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:13,713 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 424 transitions. [2021-06-05 22:00:13,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:13,714 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:13,714 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:13,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3374,653 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:13,914 INFO L430 AbstractCegarLoop]: === Iteration 659 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:13,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:13,914 INFO L82 PathProgramCache]: Analyzing trace with hash 73390698, now seen corresponding path program 653 times [2021-06-05 22:00:13,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:13,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959607650] [2021-06-05 22:00:13,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:13,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:14,098 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:14,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:14,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959607650] [2021-06-05 22:00:14,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959607650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:14,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259524591] [2021-06-05 22:00:14,098 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 654 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 654 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:14,125 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:00:14,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:14,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:00:14,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:14,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:14,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:14,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:14,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:14,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:14,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:14,401 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:14,422 INFO L628 ElimStorePlain]: treesize reduction 37, result has 40.3 percent of original size [2021-06-05 22:00:14,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:14,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:00:14,426 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:14,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:14,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:00:14,434 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 22:00:14,476 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:14,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259524591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:14,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:14,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:14,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447796739] [2021-06-05 22:00:14,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:14,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:14,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:14,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:14,477 INFO L87 Difference]: Start difference. First operand 196 states and 424 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:15,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:15,086 INFO L93 Difference]: Finished difference Result 227 states and 481 transitions. [2021-06-05 22:00:15,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:00:15,086 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:15,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:15,087 INFO L225 Difference]: With dead ends: 227 [2021-06-05 22:00:15,087 INFO L226 Difference]: Without dead ends: 211 [2021-06-05 22:00:15,087 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 643.5ms TimeCoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:00:15,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-06-05 22:00:15,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 198. [2021-06-05 22:00:15,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.1725888324873095) internal successors, (428), 197 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:15,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 428 transitions. [2021-06-05 22:00:15,088 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 428 transitions. Word has length 20 [2021-06-05 22:00:15,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:15,088 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 428 transitions. [2021-06-05 22:00:15,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:15,089 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 428 transitions. [2021-06-05 22:00:15,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:15,089 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:15,089 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:15,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3377,654 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:15,289 INFO L430 AbstractCegarLoop]: === Iteration 660 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:15,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:15,290 INFO L82 PathProgramCache]: Analyzing trace with hash 935395762, now seen corresponding path program 654 times [2021-06-05 22:00:15,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:15,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153502821] [2021-06-05 22:00:15,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:15,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:15,550 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:15,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:15,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153502821] [2021-06-05 22:00:15,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153502821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:15,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49227788] [2021-06-05 22:00:15,550 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 655 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 655 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:15,577 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:00:15,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:15,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:00:15,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:15,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:15,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:15,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:15,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:15,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:15,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:15,799 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:15,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:15,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:15,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:15,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:00:15,831 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:15,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:15,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:00:15,835 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:15,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:15,857 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:00:15,857 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:67, output treesize:29 [2021-06-05 22:00:15,925 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:15,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49227788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:15,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:15,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:15,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391294189] [2021-06-05 22:00:15,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:15,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:15,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:15,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:15,926 INFO L87 Difference]: Start difference. First operand 198 states and 428 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:16,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:16,574 INFO L93 Difference]: Finished difference Result 221 states and 469 transitions. [2021-06-05 22:00:16,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:00:16,575 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:16,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:16,575 INFO L225 Difference]: With dead ends: 221 [2021-06-05 22:00:16,575 INFO L226 Difference]: Without dead ends: 208 [2021-06-05 22:00:16,575 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 796.1ms TimeCoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:00:16,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-06-05 22:00:16,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 199. [2021-06-05 22:00:16,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.1717171717171717) internal successors, (430), 198 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:16,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 430 transitions. [2021-06-05 22:00:16,577 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 430 transitions. Word has length 20 [2021-06-05 22:00:16,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:16,578 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 430 transitions. [2021-06-05 22:00:16,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:16,578 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 430 transitions. [2021-06-05 22:00:16,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:16,578 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:16,578 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:16,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3381,655 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:16,799 INFO L430 AbstractCegarLoop]: === Iteration 661 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:16,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:16,799 INFO L82 PathProgramCache]: Analyzing trace with hash 2071581034, now seen corresponding path program 655 times [2021-06-05 22:00:16,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:16,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85247494] [2021-06-05 22:00:16,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:16,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:17,046 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:17,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:17,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85247494] [2021-06-05 22:00:17,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85247494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:17,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942315898] [2021-06-05 22:00:17,046 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 656 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 656 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:17,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:17,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:00:17,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:17,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:17,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:17,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:17,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:17,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:17,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:17,289 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:17,361 INFO L628 ElimStorePlain]: treesize reduction 94, result has 42.3 percent of original size [2021-06-05 22:00:17,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 22:00:17,365 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:17,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:17,399 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 22:00:17,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:17,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:00:17,403 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:17,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:17,429 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:00:17,429 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:173, output treesize:36 [2021-06-05 22:00:17,530 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:17,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942315898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:17,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:17,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:17,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664670906] [2021-06-05 22:00:17,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:17,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:17,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:17,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:17,531 INFO L87 Difference]: Start difference. First operand 199 states and 430 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:18,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:18,199 INFO L93 Difference]: Finished difference Result 243 states and 502 transitions. [2021-06-05 22:00:18,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:00:18,200 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:18,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:18,200 INFO L225 Difference]: With dead ends: 243 [2021-06-05 22:00:18,200 INFO L226 Difference]: Without dead ends: 224 [2021-06-05 22:00:18,200 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 831.8ms TimeCoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:00:18,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-06-05 22:00:18,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 197. [2021-06-05 22:00:18,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.173469387755102) internal successors, (426), 196 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:18,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 426 transitions. [2021-06-05 22:00:18,202 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 426 transitions. Word has length 20 [2021-06-05 22:00:18,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:18,202 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 426 transitions. [2021-06-05 22:00:18,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:18,202 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 426 transitions. [2021-06-05 22:00:18,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:18,202 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:18,202 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:18,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3387,656 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:18,405 INFO L430 AbstractCegarLoop]: === Iteration 662 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:18,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:18,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1171388358, now seen corresponding path program 656 times [2021-06-05 22:00:18,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:18,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370357835] [2021-06-05 22:00:18,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:18,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:18,625 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:18,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:18,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370357835] [2021-06-05 22:00:18,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370357835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:18,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528138653] [2021-06-05 22:00:18,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 657 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 657 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:18,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:00:18,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:18,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:00:18,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:18,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:18,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:00:18,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:18,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:18,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:18,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:00:18,873 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:18,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:18,881 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:00:18,881 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-06-05 22:00:18,930 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:18,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528138653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:18,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:18,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:18,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074134600] [2021-06-05 22:00:18,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:18,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:18,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:18,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:18,931 INFO L87 Difference]: Start difference. First operand 197 states and 426 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:19,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:19,465 INFO L93 Difference]: Finished difference Result 221 states and 472 transitions. [2021-06-05 22:00:19,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:00:19,465 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:19,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:19,465 INFO L225 Difference]: With dead ends: 221 [2021-06-05 22:00:19,465 INFO L226 Difference]: Without dead ends: 214 [2021-06-05 22:00:19,466 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 623.4ms TimeCoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:00:19,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-06-05 22:00:19,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 199. [2021-06-05 22:00:19,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.176767676767677) internal successors, (431), 198 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:19,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 431 transitions. [2021-06-05 22:00:19,467 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 431 transitions. Word has length 20 [2021-06-05 22:00:19,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:19,467 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 431 transitions. [2021-06-05 22:00:19,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:19,467 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 431 transitions. [2021-06-05 22:00:19,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:19,468 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:19,468 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:19,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 657 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3392 [2021-06-05 22:00:19,668 INFO L430 AbstractCegarLoop]: === Iteration 663 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:19,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:19,668 INFO L82 PathProgramCache]: Analyzing trace with hash -35203086, now seen corresponding path program 657 times [2021-06-05 22:00:19,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:19,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687736361] [2021-06-05 22:00:19,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:19,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:19,902 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:19,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:19,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687736361] [2021-06-05 22:00:19,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687736361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:19,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088153155] [2021-06-05 22:00:19,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 658 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 658 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:19,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:00:19,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:19,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:00:19,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:20,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:20,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:20,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:20,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:20,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:20,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:20,072 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:20,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:20,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:20,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:20,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:00:20,099 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:20,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:20,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:00:20,102 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:20,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:20,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:00:20,124 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 22:00:20,221 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:20,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088153155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:20,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:20,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:20,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038794120] [2021-06-05 22:00:20,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:20,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:20,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:20,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:20,222 INFO L87 Difference]: Start difference. First operand 199 states and 431 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:20,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:20,906 INFO L93 Difference]: Finished difference Result 225 states and 479 transitions. [2021-06-05 22:00:20,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:00:20,906 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:20,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:20,906 INFO L225 Difference]: With dead ends: 225 [2021-06-05 22:00:20,906 INFO L226 Difference]: Without dead ends: 218 [2021-06-05 22:00:20,907 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 797.1ms TimeCoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:00:20,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-06-05 22:00:20,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 199. [2021-06-05 22:00:20,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.176767676767677) internal successors, (431), 198 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:20,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 431 transitions. [2021-06-05 22:00:20,908 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 431 transitions. Word has length 20 [2021-06-05 22:00:20,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:20,908 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 431 transitions. [2021-06-05 22:00:20,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:20,908 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 431 transitions. [2021-06-05 22:00:20,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:20,909 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:20,909 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:21,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 658 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3396 [2021-06-05 22:00:21,109 INFO L430 AbstractCegarLoop]: === Iteration 664 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:21,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:21,109 INFO L82 PathProgramCache]: Analyzing trace with hash 2113593450, now seen corresponding path program 658 times [2021-06-05 22:00:21,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:21,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020076940] [2021-06-05 22:00:21,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:21,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:21,355 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:21,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:21,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020076940] [2021-06-05 22:00:21,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020076940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:21,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221742543] [2021-06-05 22:00:21,355 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 659 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 659 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:21,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:00:21,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:21,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:00:21,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:21,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:21,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:21,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:21,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:21,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:21,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:21,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:21,526 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:21,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:21,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:21,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:21,529 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:21,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:21,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:21,533 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:21,588 INFO L628 ElimStorePlain]: treesize reduction 83, result has 43.5 percent of original size [2021-06-05 22:00:21,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:21,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:21,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:00:21,592 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:21,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:21,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:00:21,595 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:21,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:21,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:00:21,619 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 22:00:21,712 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:21,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221742543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:21,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:21,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:21,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931552916] [2021-06-05 22:00:21,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:21,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:21,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:21,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:21,713 INFO L87 Difference]: Start difference. First operand 199 states and 431 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:22,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:22,272 INFO L93 Difference]: Finished difference Result 253 states and 528 transitions. [2021-06-05 22:00:22,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:00:22,272 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:22,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:22,272 INFO L225 Difference]: With dead ends: 253 [2021-06-05 22:00:22,273 INFO L226 Difference]: Without dead ends: 234 [2021-06-05 22:00:22,273 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 689.1ms TimeCoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:00:22,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-06-05 22:00:22,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 199. [2021-06-05 22:00:22,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.176767676767677) internal successors, (431), 198 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:22,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 431 transitions. [2021-06-05 22:00:22,274 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 431 transitions. Word has length 20 [2021-06-05 22:00:22,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:22,274 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 431 transitions. [2021-06-05 22:00:22,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:22,275 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 431 transitions. [2021-06-05 22:00:22,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:22,275 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:22,275 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:22,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3401,659 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:22,475 INFO L430 AbstractCegarLoop]: === Iteration 665 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:22,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:22,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1312724630, now seen corresponding path program 659 times [2021-06-05 22:00:22,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:22,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933441555] [2021-06-05 22:00:22,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:22,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:22,725 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:22,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:22,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933441555] [2021-06-05 22:00:22,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933441555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:22,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854305989] [2021-06-05 22:00:22,725 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 660 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 660 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:22,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:00:22,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:22,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:00:22,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:22,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:22,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:22,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:22,973 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:22,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:22,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:22,976 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:23,008 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-06-05 22:00:23,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:23,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:00:23,012 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:23,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:23,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:00:23,021 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-06-05 22:00:23,064 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:23,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854305989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:23,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:23,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:00:23,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39534438] [2021-06-05 22:00:23,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:00:23,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:23,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:00:23,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:00:23,064 INFO L87 Difference]: Start difference. First operand 199 states and 431 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:23,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:23,342 INFO L93 Difference]: Finished difference Result 220 states and 464 transitions. [2021-06-05 22:00:23,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:00:23,342 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:23,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:23,342 INFO L225 Difference]: With dead ends: 220 [2021-06-05 22:00:23,342 INFO L226 Difference]: Without dead ends: 204 [2021-06-05 22:00:23,342 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 447.4ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:23,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-06-05 22:00:23,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 202. [2021-06-05 22:00:23,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.174129353233831) internal successors, (437), 201 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:23,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 437 transitions. [2021-06-05 22:00:23,344 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 437 transitions. Word has length 20 [2021-06-05 22:00:23,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:23,344 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 437 transitions. [2021-06-05 22:00:23,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:23,344 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 437 transitions. [2021-06-05 22:00:23,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:23,344 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:23,344 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:23,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 660 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3404 [2021-06-05 22:00:23,545 INFO L430 AbstractCegarLoop]: === Iteration 666 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:23,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:23,545 INFO L82 PathProgramCache]: Analyzing trace with hash -450719566, now seen corresponding path program 660 times [2021-06-05 22:00:23,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:23,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101866325] [2021-06-05 22:00:23,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:23,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:23,747 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:23,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:23,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101866325] [2021-06-05 22:00:23,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101866325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:23,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844098756] [2021-06-05 22:00:23,748 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 661 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 661 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:23,774 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:00:23,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:23,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:00:23,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:23,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:23,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:23,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:23,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:23,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:23,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:23,971 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:23,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:23,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:23,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:23,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:00:23,993 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:23,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:23,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:00:23,996 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:24,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:24,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:00:24,014 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:67, output treesize:29 [2021-06-05 22:00:24,092 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:24,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844098756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:24,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:24,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:24,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949810024] [2021-06-05 22:00:24,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:24,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:24,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:24,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:24,093 INFO L87 Difference]: Start difference. First operand 202 states and 437 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:24,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:24,621 INFO L93 Difference]: Finished difference Result 221 states and 470 transitions. [2021-06-05 22:00:24,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:00:24,621 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:24,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:24,622 INFO L225 Difference]: With dead ends: 221 [2021-06-05 22:00:24,622 INFO L226 Difference]: Without dead ends: 208 [2021-06-05 22:00:24,622 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 598.4ms TimeCoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:00:24,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-06-05 22:00:24,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 203. [2021-06-05 22:00:24,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 2.1732673267326734) internal successors, (439), 202 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:24,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 439 transitions. [2021-06-05 22:00:24,623 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 439 transitions. Word has length 20 [2021-06-05 22:00:24,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:24,623 INFO L482 AbstractCegarLoop]: Abstraction has 203 states and 439 transitions. [2021-06-05 22:00:24,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:24,623 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 439 transitions. [2021-06-05 22:00:24,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:24,624 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:24,624 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:24,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3408,661 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:24,824 INFO L430 AbstractCegarLoop]: === Iteration 667 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:24,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:24,824 INFO L82 PathProgramCache]: Analyzing trace with hash 685465706, now seen corresponding path program 661 times [2021-06-05 22:00:24,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:24,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095502638] [2021-06-05 22:00:24,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:24,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:24,998 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:24,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:24,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095502638] [2021-06-05 22:00:24,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095502638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:24,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817295945] [2021-06-05 22:00:24,999 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 662 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 662 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:25,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:25,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:00:25,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:25,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:25,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:25,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:25,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:25,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:25,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:25,258 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:25,330 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-06-05 22:00:25,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:25,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:00:25,335 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:25,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:25,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:25,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:25,366 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:25,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:25,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:25,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:00:25,395 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:25,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:25,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:00:25,419 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:00:25,509 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:25,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817295945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:25,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:25,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:00:25,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546213252] [2021-06-05 22:00:25,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:00:25,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:25,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:00:25,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:00:25,509 INFO L87 Difference]: Start difference. First operand 203 states and 439 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:25,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:25,835 INFO L93 Difference]: Finished difference Result 221 states and 468 transitions. [2021-06-05 22:00:25,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:00:25,835 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:25,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:25,835 INFO L225 Difference]: With dead ends: 221 [2021-06-05 22:00:25,835 INFO L226 Difference]: Without dead ends: 209 [2021-06-05 22:00:25,835 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 491.5ms TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:00:25,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-06-05 22:00:25,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 201. [2021-06-05 22:00:25,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.175) internal successors, (435), 200 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:25,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 435 transitions. [2021-06-05 22:00:25,837 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 435 transitions. Word has length 20 [2021-06-05 22:00:25,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:25,837 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 435 transitions. [2021-06-05 22:00:25,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:25,837 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 435 transitions. [2021-06-05 22:00:25,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:25,837 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:25,837 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:26,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3414,662 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:26,038 INFO L430 AbstractCegarLoop]: === Iteration 668 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:26,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:26,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1737463610, now seen corresponding path program 662 times [2021-06-05 22:00:26,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:26,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389252798] [2021-06-05 22:00:26,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:26,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:26,280 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:26,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:26,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389252798] [2021-06-05 22:00:26,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389252798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:26,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205994249] [2021-06-05 22:00:26,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 663 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 663 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:26,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:00:26,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:26,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:00:26,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:26,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:26,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:00:26,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:26,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:26,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:26,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:00:26,540 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:26,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:26,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:00:26,547 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-06-05 22:00:26,588 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:26,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205994249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:26,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:26,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:26,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114373391] [2021-06-05 22:00:26,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:26,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:26,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:26,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:26,589 INFO L87 Difference]: Start difference. First operand 201 states and 435 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:27,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:27,004 INFO L93 Difference]: Finished difference Result 223 states and 477 transitions. [2021-06-05 22:00:27,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:00:27,005 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:27,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:27,005 INFO L225 Difference]: With dead ends: 223 [2021-06-05 22:00:27,005 INFO L226 Difference]: Without dead ends: 216 [2021-06-05 22:00:27,005 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 569.0ms TimeCoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:00:27,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-06-05 22:00:27,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 203. [2021-06-05 22:00:27,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 2.1782178217821784) internal successors, (440), 202 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:27,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 440 transitions. [2021-06-05 22:00:27,010 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 440 transitions. Word has length 20 [2021-06-05 22:00:27,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:27,010 INFO L482 AbstractCegarLoop]: Abstraction has 203 states and 440 transitions. [2021-06-05 22:00:27,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:27,011 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 440 transitions. [2021-06-05 22:00:27,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:27,011 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:27,011 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:27,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3419,663 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:27,221 INFO L430 AbstractCegarLoop]: === Iteration 669 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:27,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:27,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1421318414, now seen corresponding path program 663 times [2021-06-05 22:00:27,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:27,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112371590] [2021-06-05 22:00:27,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:27,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:27,462 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:27,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:27,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112371590] [2021-06-05 22:00:27,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112371590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:27,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436538105] [2021-06-05 22:00:27,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 664 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 664 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:27,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:00:27,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:27,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:00:27,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:27,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:27,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:27,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:27,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:27,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:27,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:27,661 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:27,723 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-06-05 22:00:27,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:27,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:00:27,727 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:27,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:27,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:27,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:27,755 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:27,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:27,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:27,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:00:27,782 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:27,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:27,804 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:00:27,804 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:00:27,893 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:27,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436538105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:27,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:27,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:00:27,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930799129] [2021-06-05 22:00:27,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:00:27,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:27,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:00:27,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:00:27,893 INFO L87 Difference]: Start difference. First operand 203 states and 440 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:28,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:28,350 INFO L93 Difference]: Finished difference Result 249 states and 514 transitions. [2021-06-05 22:00:28,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:00:28,350 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:28,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:28,350 INFO L225 Difference]: With dead ends: 249 [2021-06-05 22:00:28,351 INFO L226 Difference]: Without dead ends: 230 [2021-06-05 22:00:28,351 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 661.7ms TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:00:28,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-06-05 22:00:28,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 202. [2021-06-05 22:00:28,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.174129353233831) internal successors, (437), 201 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:28,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 437 transitions. [2021-06-05 22:00:28,352 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 437 transitions. Word has length 20 [2021-06-05 22:00:28,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:28,352 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 437 transitions. [2021-06-05 22:00:28,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:28,352 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 437 transitions. [2021-06-05 22:00:28,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:28,353 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:28,353 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:28,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 664 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3422 [2021-06-05 22:00:28,553 INFO L430 AbstractCegarLoop]: === Iteration 670 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:28,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:28,553 INFO L82 PathProgramCache]: Analyzing trace with hash 727478122, now seen corresponding path program 664 times [2021-06-05 22:00:28,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:28,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239603897] [2021-06-05 22:00:28,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:28,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:28,762 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:28,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:28,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239603897] [2021-06-05 22:00:28,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239603897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:28,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317237553] [2021-06-05 22:00:28,762 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 665 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 665 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:28,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:00:28,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:28,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:00:28,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:28,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:28,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:28,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:28,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:28,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:28,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:28,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:28,961 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:28,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:28,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:28,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:28,965 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:28,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:28,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:28,968 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:29,039 INFO L628 ElimStorePlain]: treesize reduction 77, result has 46.5 percent of original size [2021-06-05 22:00:29,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:29,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:29,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:00:29,047 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:29,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:29,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:00:29,050 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:29,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:29,075 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:00:29,075 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 22:00:29,157 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:29,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317237553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:29,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:29,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:29,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878388405] [2021-06-05 22:00:29,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:29,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:29,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:29,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:29,157 INFO L87 Difference]: Start difference. First operand 202 states and 437 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:29,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:29,649 INFO L93 Difference]: Finished difference Result 256 states and 534 transitions. [2021-06-05 22:00:29,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:00:29,650 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:29,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:29,650 INFO L225 Difference]: With dead ends: 256 [2021-06-05 22:00:29,650 INFO L226 Difference]: Without dead ends: 237 [2021-06-05 22:00:29,650 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 645.0ms TimeCoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:00:29,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-06-05 22:00:29,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 202. [2021-06-05 22:00:29,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.174129353233831) internal successors, (437), 201 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:29,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 437 transitions. [2021-06-05 22:00:29,652 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 437 transitions. Word has length 20 [2021-06-05 22:00:29,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:29,652 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 437 transitions. [2021-06-05 22:00:29,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:29,652 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 437 transitions. [2021-06-05 22:00:29,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:29,652 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:29,652 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:29,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3427,665 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:29,853 INFO L430 AbstractCegarLoop]: === Iteration 671 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:29,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:29,853 INFO L82 PathProgramCache]: Analyzing trace with hash 851665330, now seen corresponding path program 665 times [2021-06-05 22:00:29,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:29,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718132993] [2021-06-05 22:00:29,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:29,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:30,030 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:30,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:30,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718132993] [2021-06-05 22:00:30,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718132993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:30,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477425913] [2021-06-05 22:00:30,030 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 666 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 666 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:30,058 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:00:30,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:30,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:00:30,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:30,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:30,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:30,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:00:30,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:30,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:30,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:00:30,257 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:30,279 INFO L628 ElimStorePlain]: treesize reduction 40, result has 38.5 percent of original size [2021-06-05 22:00:30,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:30,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:00:30,282 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:30,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:30,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:00:30,290 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 22:00:30,327 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:30,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477425913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:30,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:30,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:00:30,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045922960] [2021-06-05 22:00:30,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:00:30,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:30,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:00:30,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:00:30,328 INFO L87 Difference]: Start difference. First operand 202 states and 437 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:30,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:30,614 INFO L93 Difference]: Finished difference Result 226 states and 480 transitions. [2021-06-05 22:00:30,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:00:30,614 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:30,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:30,614 INFO L225 Difference]: With dead ends: 226 [2021-06-05 22:00:30,614 INFO L226 Difference]: Without dead ends: 213 [2021-06-05 22:00:30,614 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 391.8ms TimeCoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:00:30,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-06-05 22:00:30,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 205. [2021-06-05 22:00:30,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.1715686274509802) internal successors, (443), 204 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:30,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 443 transitions. [2021-06-05 22:00:30,616 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 443 transitions. Word has length 20 [2021-06-05 22:00:30,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:30,616 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 443 transitions. [2021-06-05 22:00:30,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:30,616 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 443 transitions. [2021-06-05 22:00:30,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:30,616 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:30,616 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:30,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 666 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3430 [2021-06-05 22:00:30,817 INFO L430 AbstractCegarLoop]: === Iteration 672 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:30,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:30,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1987850602, now seen corresponding path program 666 times [2021-06-05 22:00:30,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:30,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892956885] [2021-06-05 22:00:30,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:30,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:30,987 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:30,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:30,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892956885] [2021-06-05 22:00:30,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892956885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:30,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346813533] [2021-06-05 22:00:30,988 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 667 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 667 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:31,016 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:00:31,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:31,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:00:31,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:31,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:31,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:31,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:31,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:31,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:31,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:31,158 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:31,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:31,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:31,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:31,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:00:31,184 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:31,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:31,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:00:31,187 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:31,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:31,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:00:31,209 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 22:00:31,317 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:31,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346813533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:31,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:31,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:00:31,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667649762] [2021-06-05 22:00:31,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:00:31,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:31,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:00:31,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:00:31,318 INFO L87 Difference]: Start difference. First operand 205 states and 443 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:31,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:31,669 INFO L93 Difference]: Finished difference Result 225 states and 478 transitions. [2021-06-05 22:00:31,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:00:31,669 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:31,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:31,670 INFO L225 Difference]: With dead ends: 225 [2021-06-05 22:00:31,670 INFO L226 Difference]: Without dead ends: 215 [2021-06-05 22:00:31,670 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 464.6ms TimeCoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:00:31,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-06-05 22:00:31,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 206. [2021-06-05 22:00:31,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.175609756097561) internal successors, (446), 205 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:31,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 446 transitions. [2021-06-05 22:00:31,671 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 446 transitions. Word has length 20 [2021-06-05 22:00:31,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:31,671 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 446 transitions. [2021-06-05 22:00:31,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:31,671 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 446 transitions. [2021-06-05 22:00:31,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:31,672 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:31,672 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:31,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3433,667 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:31,872 INFO L430 AbstractCegarLoop]: === Iteration 673 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:31,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:31,872 INFO L82 PathProgramCache]: Analyzing trace with hash -158320158, now seen corresponding path program 667 times [2021-06-05 22:00:31,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:31,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232227594] [2021-06-05 22:00:31,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:31,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:32,074 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:32,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:32,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232227594] [2021-06-05 22:00:32,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232227594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:32,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469704446] [2021-06-05 22:00:32,074 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 668 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 668 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:32,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:32,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:00:32,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:32,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:32,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:32,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:32,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:32,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:32,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:32,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:32,247 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:32,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:32,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:32,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:32,250 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:32,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:32,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:32,254 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:32,310 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-06-05 22:00:32,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:32,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:32,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:00:32,314 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:32,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:32,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:00:32,318 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:32,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:32,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:00:32,342 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 22:00:32,420 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:32,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469704446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:32,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:32,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:00:32,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238420414] [2021-06-05 22:00:32,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:00:32,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:32,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:00:32,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:00:32,420 INFO L87 Difference]: Start difference. First operand 206 states and 446 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:32,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:32,913 INFO L93 Difference]: Finished difference Result 257 states and 537 transitions. [2021-06-05 22:00:32,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:00:32,913 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:32,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:32,914 INFO L225 Difference]: With dead ends: 257 [2021-06-05 22:00:32,914 INFO L226 Difference]: Without dead ends: 238 [2021-06-05 22:00:32,914 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 669.3ms TimeCoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:00:32,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-06-05 22:00:32,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 206. [2021-06-05 22:00:32,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.175609756097561) internal successors, (446), 205 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:32,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 446 transitions. [2021-06-05 22:00:32,916 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 446 transitions. Word has length 20 [2021-06-05 22:00:32,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:32,916 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 446 transitions. [2021-06-05 22:00:32,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:32,916 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 446 transitions. [2021-06-05 22:00:32,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:32,916 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:32,916 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:33,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3438,668 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:33,117 INFO L430 AbstractCegarLoop]: === Iteration 674 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:33,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:33,117 INFO L82 PathProgramCache]: Analyzing trace with hash 2029863018, now seen corresponding path program 668 times [2021-06-05 22:00:33,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:33,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559655417] [2021-06-05 22:00:33,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:33,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:33,357 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:33,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:33,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559655417] [2021-06-05 22:00:33,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559655417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:33,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089011400] [2021-06-05 22:00:33,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 669 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 669 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:33,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:00:33,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:33,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:00:33,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:33,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:33,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:33,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:33,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:33,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:33,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:33,555 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:33,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:33,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:33,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:33,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:00:33,584 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:33,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:33,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:00:33,587 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:33,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:33,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:00:33,609 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 22:00:33,691 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:33,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089011400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:33,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:33,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:33,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461877722] [2021-06-05 22:00:33,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:33,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:33,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:33,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:33,692 INFO L87 Difference]: Start difference. First operand 206 states and 446 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:34,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:34,399 INFO L93 Difference]: Finished difference Result 239 states and 513 transitions. [2021-06-05 22:00:34,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:00:34,400 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:34,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:34,400 INFO L225 Difference]: With dead ends: 239 [2021-06-05 22:00:34,400 INFO L226 Difference]: Without dead ends: 230 [2021-06-05 22:00:34,400 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 907.9ms TimeCoverageRelationStatistics Valid=149, Invalid=1257, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:00:34,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-06-05 22:00:34,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 208. [2021-06-05 22:00:34,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.183574879227053) internal successors, (452), 207 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:34,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 452 transitions. [2021-06-05 22:00:34,402 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 452 transitions. Word has length 20 [2021-06-05 22:00:34,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:34,402 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 452 transitions. [2021-06-05 22:00:34,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:34,402 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 452 transitions. [2021-06-05 22:00:34,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:34,402 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:34,402 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:34,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 669 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3441 [2021-06-05 22:00:34,607 INFO L430 AbstractCegarLoop]: === Iteration 675 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:34,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:34,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1686900046, now seen corresponding path program 669 times [2021-06-05 22:00:34,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:34,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730331838] [2021-06-05 22:00:34,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:34,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:34,818 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:34,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:34,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730331838] [2021-06-05 22:00:34,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730331838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:34,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192289039] [2021-06-05 22:00:34,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 670 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 670 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:34,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:00:34,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:34,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:00:34,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:35,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:35,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:35,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:00:35,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:35,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:35,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:00:35,113 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:35,135 INFO L628 ElimStorePlain]: treesize reduction 40, result has 38.5 percent of original size [2021-06-05 22:00:35,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:35,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:00:35,138 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:35,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:35,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:00:35,145 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-06-05 22:00:35,183 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:35,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192289039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:35,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:35,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:00:35,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112588579] [2021-06-05 22:00:35,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:00:35,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:35,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:00:35,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:00:35,184 INFO L87 Difference]: Start difference. First operand 208 states and 452 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:35,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:35,456 INFO L93 Difference]: Finished difference Result 231 states and 493 transitions. [2021-06-05 22:00:35,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:00:35,456 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:35,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:35,457 INFO L225 Difference]: With dead ends: 231 [2021-06-05 22:00:35,457 INFO L226 Difference]: Without dead ends: 218 [2021-06-05 22:00:35,457 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 483.1ms TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:00:35,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-06-05 22:00:35,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 213. [2021-06-05 22:00:35,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.1792452830188678) internal successors, (462), 212 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:35,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 462 transitions. [2021-06-05 22:00:35,458 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 462 transitions. Word has length 20 [2021-06-05 22:00:35,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:35,458 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 462 transitions. [2021-06-05 22:00:35,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:35,459 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 462 transitions. [2021-06-05 22:00:35,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:35,459 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:35,459 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:35,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3444,670 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:35,675 INFO L430 AbstractCegarLoop]: === Iteration 676 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:35,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:35,675 INFO L82 PathProgramCache]: Analyzing trace with hash -550714774, now seen corresponding path program 670 times [2021-06-05 22:00:35,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:35,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124313013] [2021-06-05 22:00:35,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:35,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:35,935 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:35,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:35,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124313013] [2021-06-05 22:00:35,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124313013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:35,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689138546] [2021-06-05 22:00:35,936 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 671 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 671 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:35,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:00:35,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:35,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:00:35,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:36,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:36,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:36,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:36,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:36,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:36,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:36,144 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:36,209 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-06-05 22:00:36,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:36,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:00:36,214 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:36,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:36,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:36,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:36,242 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:36,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:36,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:36,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:00:36,269 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:36,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:36,291 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:00:36,291 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:00:36,374 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:36,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689138546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:36,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:36,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:36,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729991992] [2021-06-05 22:00:36,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:36,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:36,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:36,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:36,375 INFO L87 Difference]: Start difference. First operand 213 states and 462 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:36,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:36,719 INFO L93 Difference]: Finished difference Result 251 states and 522 transitions. [2021-06-05 22:00:36,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:00:36,719 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:36,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:36,719 INFO L225 Difference]: With dead ends: 251 [2021-06-05 22:00:36,719 INFO L226 Difference]: Without dead ends: 232 [2021-06-05 22:00:36,720 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 610.2ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:00:36,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-06-05 22:00:36,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 212. [2021-06-05 22:00:36,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.1800947867298577) internal successors, (460), 211 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:36,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 460 transitions. [2021-06-05 22:00:36,721 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 460 transitions. Word has length 20 [2021-06-05 22:00:36,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:36,721 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 460 transitions. [2021-06-05 22:00:36,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:36,721 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 460 transitions. [2021-06-05 22:00:36,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:36,722 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:36,722 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:36,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3447,671 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:36,922 INFO L430 AbstractCegarLoop]: === Iteration 677 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:36,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:36,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1598081762, now seen corresponding path program 671 times [2021-06-05 22:00:36,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:36,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186331555] [2021-06-05 22:00:36,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:36,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:37,166 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:37,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:37,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186331555] [2021-06-05 22:00:37,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186331555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:37,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511174611] [2021-06-05 22:00:37,166 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 672 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 672 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:37,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:00:37,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:37,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:00:37,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:37,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:37,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:37,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:37,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:37,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:37,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:37,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:37,346 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:37,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:37,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:37,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:37,350 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:37,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:37,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:37,354 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:37,408 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-06-05 22:00:37,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:37,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:37,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:00:37,413 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:37,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:37,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:00:37,416 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:37,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:37,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:00:37,441 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 22:00:37,526 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:37,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511174611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:37,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:37,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:37,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563823452] [2021-06-05 22:00:37,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:37,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:37,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:37,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:37,527 INFO L87 Difference]: Start difference. First operand 212 states and 460 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:38,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:38,027 INFO L93 Difference]: Finished difference Result 261 states and 547 transitions. [2021-06-05 22:00:38,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:00:38,027 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:38,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:38,027 INFO L225 Difference]: With dead ends: 261 [2021-06-05 22:00:38,027 INFO L226 Difference]: Without dead ends: 242 [2021-06-05 22:00:38,027 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 704.3ms TimeCoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:00:38,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-06-05 22:00:38,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 211. [2021-06-05 22:00:38,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.1809523809523808) internal successors, (458), 210 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:38,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 458 transitions. [2021-06-05 22:00:38,029 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 458 transitions. Word has length 20 [2021-06-05 22:00:38,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:38,029 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 458 transitions. [2021-06-05 22:00:38,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:38,029 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 458 transitions. [2021-06-05 22:00:38,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:38,029 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:38,030 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:38,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 672 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3452 [2021-06-05 22:00:38,246 INFO L430 AbstractCegarLoop]: === Iteration 678 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:38,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:38,247 INFO L82 PathProgramCache]: Analyzing trace with hash -508702358, now seen corresponding path program 672 times [2021-06-05 22:00:38,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:38,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778934416] [2021-06-05 22:00:38,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:38,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:38,429 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:38,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:38,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778934416] [2021-06-05 22:00:38,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778934416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:38,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546767424] [2021-06-05 22:00:38,429 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 673 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 673 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:38,455 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:00:38,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:38,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:00:38,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:38,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:38,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:38,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:38,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:38,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:38,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:38,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:38,618 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:38,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:38,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:38,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:38,622 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:38,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:38,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:38,625 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:38,686 INFO L628 ElimStorePlain]: treesize reduction 80, result has 46.7 percent of original size [2021-06-05 22:00:38,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:38,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:38,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:00:38,691 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:38,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:38,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:00:38,695 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:38,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:38,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:00:38,725 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 22:00:38,811 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:38,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546767424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:38,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:38,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:00:38,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487357150] [2021-06-05 22:00:38,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:00:38,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:38,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:00:38,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:00:38,811 INFO L87 Difference]: Start difference. First operand 211 states and 458 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:39,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:39,247 INFO L93 Difference]: Finished difference Result 242 states and 518 transitions. [2021-06-05 22:00:39,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:00:39,248 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:39,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:39,248 INFO L225 Difference]: With dead ends: 242 [2021-06-05 22:00:39,248 INFO L226 Difference]: Without dead ends: 230 [2021-06-05 22:00:39,248 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 532.1ms TimeCoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:00:39,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-06-05 22:00:39,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 212. [2021-06-05 22:00:39,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.184834123222749) internal successors, (461), 211 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:39,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 461 transitions. [2021-06-05 22:00:39,250 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 461 transitions. Word has length 20 [2021-06-05 22:00:39,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:39,250 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 461 transitions. [2021-06-05 22:00:39,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:39,250 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 461 transitions. [2021-06-05 22:00:39,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:39,250 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:39,250 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:39,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3455,673 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:39,451 INFO L430 AbstractCegarLoop]: === Iteration 679 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:39,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:39,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1394500638, now seen corresponding path program 673 times [2021-06-05 22:00:39,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:39,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640064436] [2021-06-05 22:00:39,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:39,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:39,719 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:39,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:39,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640064436] [2021-06-05 22:00:39,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640064436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:39,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421384054] [2021-06-05 22:00:39,720 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 674 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 674 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:39,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:39,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:00:39,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:39,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:39,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:39,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:39,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:39,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:39,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:39,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:39,944 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:39,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:39,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:39,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:39,948 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:39,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:39,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:39,951 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:40,008 INFO L628 ElimStorePlain]: treesize reduction 80, result has 44.4 percent of original size [2021-06-05 22:00:40,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:40,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:40,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:00:40,013 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:40,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:40,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:00:40,016 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:40,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:40,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:00:40,040 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 22:00:40,129 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:40,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421384054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:40,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:40,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:40,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278051157] [2021-06-05 22:00:40,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:40,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:40,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:40,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:40,129 INFO L87 Difference]: Start difference. First operand 212 states and 461 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:41,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:41,298 INFO L93 Difference]: Finished difference Result 329 states and 666 transitions. [2021-06-05 22:00:41,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:00:41,299 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:41,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:41,299 INFO L225 Difference]: With dead ends: 329 [2021-06-05 22:00:41,299 INFO L226 Difference]: Without dead ends: 289 [2021-06-05 22:00:41,299 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1288.5ms TimeCoverageRelationStatistics Valid=172, Invalid=1234, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:00:41,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-06-05 22:00:41,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 217. [2021-06-05 22:00:41,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.2037037037037037) internal successors, (476), 216 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:41,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 476 transitions. [2021-06-05 22:00:41,301 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 476 transitions. Word has length 20 [2021-06-05 22:00:41,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:41,301 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 476 transitions. [2021-06-05 22:00:41,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:41,301 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 476 transitions. [2021-06-05 22:00:41,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:41,301 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:41,302 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:41,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 674 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3458 [2021-06-05 22:00:41,502 INFO L430 AbstractCegarLoop]: === Iteration 680 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:41,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:41,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1210523754, now seen corresponding path program 674 times [2021-06-05 22:00:41,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:41,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189254275] [2021-06-05 22:00:41,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:41,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:41,734 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:41,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:41,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189254275] [2021-06-05 22:00:41,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189254275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:41,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556573586] [2021-06-05 22:00:41,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 675 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 675 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:41,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:00:41,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:41,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:00:41,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:41,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:41,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:41,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:41,933 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:41,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:41,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:41,936 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:41,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:41,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:41,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:41,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:00:41,962 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:41,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:41,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:00:41,965 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:41,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:41,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:00:41,987 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 22:00:42,069 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:42,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556573586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:42,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:42,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:00:42,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332153749] [2021-06-05 22:00:42,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:00:42,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:42,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:00:42,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:00:42,070 INFO L87 Difference]: Start difference. First operand 217 states and 476 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:42,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:42,715 INFO L93 Difference]: Finished difference Result 252 states and 547 transitions. [2021-06-05 22:00:42,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:00:42,716 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:42,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:42,716 INFO L225 Difference]: With dead ends: 252 [2021-06-05 22:00:42,716 INFO L226 Difference]: Without dead ends: 243 [2021-06-05 22:00:42,716 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 794.9ms TimeCoverageRelationStatistics Valid=117, Invalid=1073, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:00:42,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-06-05 22:00:42,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 221. [2021-06-05 22:00:42,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.2045454545454546) internal successors, (485), 220 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:42,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 485 transitions. [2021-06-05 22:00:42,718 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 485 transitions. Word has length 20 [2021-06-05 22:00:42,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:42,718 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 485 transitions. [2021-06-05 22:00:42,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:42,718 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 485 transitions. [2021-06-05 22:00:42,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:42,718 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:42,718 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:42,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 675 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3461 [2021-06-05 22:00:42,919 INFO L430 AbstractCegarLoop]: === Iteration 681 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:42,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:42,919 INFO L82 PathProgramCache]: Analyzing trace with hash -309493022, now seen corresponding path program 675 times [2021-06-05 22:00:42,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:42,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90954853] [2021-06-05 22:00:42,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:42,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:43,127 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:43,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:43,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90954853] [2021-06-05 22:00:43,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90954853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:43,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153960908] [2021-06-05 22:00:43,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 676 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 676 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:43,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:00:43,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:43,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:00:43,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:43,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:43,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:00:43,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:43,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:43,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:43,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:00:43,385 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:43,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:43,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:00:43,392 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-06-05 22:00:43,444 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:43,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153960908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:43,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:43,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:43,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612596046] [2021-06-05 22:00:43,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:43,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:43,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:43,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:43,445 INFO L87 Difference]: Start difference. First operand 221 states and 485 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:43,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:43,643 INFO L93 Difference]: Finished difference Result 247 states and 529 transitions. [2021-06-05 22:00:43,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:00:43,643 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:43,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:43,643 INFO L225 Difference]: With dead ends: 247 [2021-06-05 22:00:43,643 INFO L226 Difference]: Without dead ends: 240 [2021-06-05 22:00:43,644 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 452.2ms TimeCoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:00:43,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-06-05 22:00:43,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 222. [2021-06-05 22:00:43,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.2081447963800906) internal successors, (488), 221 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:43,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 488 transitions. [2021-06-05 22:00:43,645 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 488 transitions. Word has length 20 [2021-06-05 22:00:43,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:43,645 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 488 transitions. [2021-06-05 22:00:43,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:43,645 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 488 transitions. [2021-06-05 22:00:43,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:43,646 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:43,646 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:43,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3464,676 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:43,846 INFO L430 AbstractCegarLoop]: === Iteration 682 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:43,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:43,846 INFO L82 PathProgramCache]: Analyzing trace with hash -851314646, now seen corresponding path program 676 times [2021-06-05 22:00:43,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:43,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360958693] [2021-06-05 22:00:43,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:43,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:44,025 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:44,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:44,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360958693] [2021-06-05 22:00:44,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360958693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:44,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653073298] [2021-06-05 22:00:44,025 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 677 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 677 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:44,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:00:44,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:44,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:00:44,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:44,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:44,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:44,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:00:44,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:44,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:44,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:00:44,260 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:44,282 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-06-05 22:00:44,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:44,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:00:44,285 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:44,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:44,292 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:00:44,293 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:00:44,331 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:44,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653073298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:44,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:44,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:00:44,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386346978] [2021-06-05 22:00:44,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:00:44,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:44,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:00:44,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:00:44,332 INFO L87 Difference]: Start difference. First operand 222 states and 488 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:44,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:44,658 INFO L93 Difference]: Finished difference Result 268 states and 570 transitions. [2021-06-05 22:00:44,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:00:44,658 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:44,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:44,658 INFO L225 Difference]: With dead ends: 268 [2021-06-05 22:00:44,658 INFO L226 Difference]: Without dead ends: 249 [2021-06-05 22:00:44,658 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 475.7ms TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:00:44,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-06-05 22:00:44,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 223. [2021-06-05 22:00:44,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.2072072072072073) internal successors, (490), 222 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:44,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 490 transitions. [2021-06-05 22:00:44,660 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 490 transitions. Word has length 20 [2021-06-05 22:00:44,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:44,660 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 490 transitions. [2021-06-05 22:00:44,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:44,660 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 490 transitions. [2021-06-05 22:00:44,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:44,661 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:44,661 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:44,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3465,677 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:44,861 INFO L430 AbstractCegarLoop]: === Iteration 683 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:44,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:44,862 INFO L82 PathProgramCache]: Analyzing trace with hash 101038562, now seen corresponding path program 677 times [2021-06-05 22:00:44,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:44,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527549264] [2021-06-05 22:00:44,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:44,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:45,178 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:45,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:45,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527549264] [2021-06-05 22:00:45,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527549264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:45,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366939782] [2021-06-05 22:00:45,179 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 678 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 678 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:45,207 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:00:45,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:45,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:00:45,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:45,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:45,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:45,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:00:45,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:45,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:45,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:00:45,430 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:45,452 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-06-05 22:00:45,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:45,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:00:45,456 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:45,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:45,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:00:45,464 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:00:45,521 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:45,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366939782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:45,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:45,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:45,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39525005] [2021-06-05 22:00:45,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:45,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:45,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:45,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:45,522 INFO L87 Difference]: Start difference. First operand 223 states and 490 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:45,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:45,817 INFO L93 Difference]: Finished difference Result 253 states and 538 transitions. [2021-06-05 22:00:45,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:00:45,817 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:45,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:45,818 INFO L225 Difference]: With dead ends: 253 [2021-06-05 22:00:45,818 INFO L226 Difference]: Without dead ends: 237 [2021-06-05 22:00:45,818 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 629.1ms TimeCoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:00:45,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-06-05 22:00:45,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 224. [2021-06-05 22:00:45,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.2062780269058297) internal successors, (492), 223 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:45,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 492 transitions. [2021-06-05 22:00:45,819 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 492 transitions. Word has length 20 [2021-06-05 22:00:45,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:45,820 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 492 transitions. [2021-06-05 22:00:45,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:45,820 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 492 transitions. [2021-06-05 22:00:45,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:45,820 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:45,820 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:46,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 678 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3466 [2021-06-05 22:00:46,020 INFO L430 AbstractCegarLoop]: === Iteration 684 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:46,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:46,021 INFO L82 PathProgramCache]: Analyzing trace with hash 963043626, now seen corresponding path program 678 times [2021-06-05 22:00:46,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:46,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224863857] [2021-06-05 22:00:46,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:46,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:46,176 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:46,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:46,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224863857] [2021-06-05 22:00:46,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224863857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:46,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323252452] [2021-06-05 22:00:46,177 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 679 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 679 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:46,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:00:46,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:46,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:00:46,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:46,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:46,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:00:46,438 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:46,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:46,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:46,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:00:46,447 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:46,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:46,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:00:46,453 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-06-05 22:00:46,495 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:46,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323252452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:46,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:46,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:00:46,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448640788] [2021-06-05 22:00:46,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:00:46,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:46,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:00:46,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:00:46,496 INFO L87 Difference]: Start difference. First operand 224 states and 492 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:46,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:46,855 INFO L93 Difference]: Finished difference Result 262 states and 561 transitions. [2021-06-05 22:00:46,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:00:46,855 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:46,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:46,856 INFO L225 Difference]: With dead ends: 262 [2021-06-05 22:00:46,856 INFO L226 Difference]: Without dead ends: 255 [2021-06-05 22:00:46,856 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 474.1ms TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:00:46,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-06-05 22:00:46,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 225. [2021-06-05 22:00:46,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.2098214285714284) internal successors, (495), 224 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:46,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 495 transitions. [2021-06-05 22:00:46,858 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 495 transitions. Word has length 20 [2021-06-05 22:00:46,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:46,858 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 495 transitions. [2021-06-05 22:00:46,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:46,858 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 495 transitions. [2021-06-05 22:00:46,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:46,858 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:46,858 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:47,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3467,679 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:47,066 INFO L430 AbstractCegarLoop]: === Iteration 685 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:47,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:47,067 INFO L82 PathProgramCache]: Analyzing trace with hash 2099228898, now seen corresponding path program 679 times [2021-06-05 22:00:47,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:47,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092270154] [2021-06-05 22:00:47,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:47,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:47,338 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:47,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:47,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092270154] [2021-06-05 22:00:47,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092270154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:47,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015692345] [2021-06-05 22:00:47,339 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 680 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 680 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:47,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:47,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:00:47,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:47,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:47,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:47,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:47,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:47,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:47,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:47,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:47,568 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:47,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:47,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:47,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:47,572 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:47,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:47,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:47,576 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:47,630 INFO L628 ElimStorePlain]: treesize reduction 77, result has 46.5 percent of original size [2021-06-05 22:00:47,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:47,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:47,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:00:47,634 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:47,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:47,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:00:47,638 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:47,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:47,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:00:47,663 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 22:00:47,764 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:47,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015692345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:47,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:47,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:47,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076314072] [2021-06-05 22:00:47,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:47,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:47,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:47,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:47,764 INFO L87 Difference]: Start difference. First operand 225 states and 495 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:48,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:48,296 INFO L93 Difference]: Finished difference Result 281 states and 586 transitions. [2021-06-05 22:00:48,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:00:48,296 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:48,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:48,297 INFO L225 Difference]: With dead ends: 281 [2021-06-05 22:00:48,297 INFO L226 Difference]: Without dead ends: 262 [2021-06-05 22:00:48,297 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 788.8ms TimeCoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:00:48,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-05 22:00:48,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 221. [2021-06-05 22:00:48,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.2045454545454546) internal successors, (485), 220 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:48,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 485 transitions. [2021-06-05 22:00:48,299 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 485 transitions. Word has length 20 [2021-06-05 22:00:48,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:48,299 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 485 transitions. [2021-06-05 22:00:48,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:48,299 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 485 transitions. [2021-06-05 22:00:48,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:48,299 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:48,299 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:48,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3468,680 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:48,500 INFO L430 AbstractCegarLoop]: === Iteration 686 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:48,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:48,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1753709746, now seen corresponding path program 680 times [2021-06-05 22:00:48,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:48,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757391482] [2021-06-05 22:00:48,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:48,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:48,726 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:48,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:48,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757391482] [2021-06-05 22:00:48,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757391482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:48,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180451723] [2021-06-05 22:00:48,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 681 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 681 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:48,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:00:48,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:48,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:00:48,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:48,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:48,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:00:48,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:48,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:48,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:48,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:00:48,983 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:48,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:48,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:00:48,989 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-06-05 22:00:49,032 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:49,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180451723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:49,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:49,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:49,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320079901] [2021-06-05 22:00:49,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:49,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:49,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:49,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:49,033 INFO L87 Difference]: Start difference. First operand 221 states and 485 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:49,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:49,336 INFO L93 Difference]: Finished difference Result 245 states and 526 transitions. [2021-06-05 22:00:49,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:00:49,336 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:49,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:49,336 INFO L225 Difference]: With dead ends: 245 [2021-06-05 22:00:49,337 INFO L226 Difference]: Without dead ends: 238 [2021-06-05 22:00:49,337 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 495.0ms TimeCoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:00:49,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-06-05 22:00:49,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 223. [2021-06-05 22:00:49,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.2072072072072073) internal successors, (490), 222 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:49,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 490 transitions. [2021-06-05 22:00:49,338 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 490 transitions. Word has length 20 [2021-06-05 22:00:49,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:49,339 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 490 transitions. [2021-06-05 22:00:49,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:49,339 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 490 transitions. [2021-06-05 22:00:49,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:49,339 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:49,339 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:49,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3471,681 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:49,539 INFO L430 AbstractCegarLoop]: === Iteration 687 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:49,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:49,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1588904342, now seen corresponding path program 681 times [2021-06-05 22:00:49,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:49,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780585223] [2021-06-05 22:00:49,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:49,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:49,793 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:49,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:49,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780585223] [2021-06-05 22:00:49,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780585223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:49,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696769282] [2021-06-05 22:00:49,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 682 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 682 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:49,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:00:49,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:49,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:00:49,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:50,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:50,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:50,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:00:50,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:50,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:50,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:00:50,019 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:50,040 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-06-05 22:00:50,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:50,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:00:50,043 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:50,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:50,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:00:50,051 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:00:50,095 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:50,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696769282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:50,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:50,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:50,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557314074] [2021-06-05 22:00:50,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:50,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:50,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:50,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:50,095 INFO L87 Difference]: Start difference. First operand 223 states and 490 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:50,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:50,421 INFO L93 Difference]: Finished difference Result 249 states and 531 transitions. [2021-06-05 22:00:50,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:00:50,421 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:50,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:50,421 INFO L225 Difference]: With dead ends: 249 [2021-06-05 22:00:50,421 INFO L226 Difference]: Without dead ends: 233 [2021-06-05 22:00:50,421 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 581.9ms TimeCoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:00:50,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-06-05 22:00:50,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 224. [2021-06-05 22:00:50,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.2062780269058297) internal successors, (492), 223 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:50,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 492 transitions. [2021-06-05 22:00:50,423 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 492 transitions. Word has length 20 [2021-06-05 22:00:50,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:50,423 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 492 transitions. [2021-06-05 22:00:50,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:50,423 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 492 transitions. [2021-06-05 22:00:50,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:50,423 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:50,423 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:50,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 682 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3472 [2021-06-05 22:00:50,624 INFO L430 AbstractCegarLoop]: === Iteration 688 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:50,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:50,624 INFO L82 PathProgramCache]: Analyzing trace with hash -726899278, now seen corresponding path program 682 times [2021-06-05 22:00:50,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:50,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652657741] [2021-06-05 22:00:50,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:50,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:50,823 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:50,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:50,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652657741] [2021-06-05 22:00:50,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652657741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:50,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190122251] [2021-06-05 22:00:50,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 683 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 683 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:50,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:00:50,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:50,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:00:50,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:51,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:51,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:51,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:00:51,071 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:51,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:51,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:00:51,075 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:51,099 INFO L628 ElimStorePlain]: treesize reduction 36, result has 47.8 percent of original size [2021-06-05 22:00:51,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:51,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:00:51,101 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:51,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:51,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:00:51,109 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:00:51,154 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:51,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190122251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:51,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:51,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:51,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252462574] [2021-06-05 22:00:51,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:51,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:51,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:51,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:51,154 INFO L87 Difference]: Start difference. First operand 224 states and 492 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:51,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:51,630 INFO L93 Difference]: Finished difference Result 257 states and 549 transitions. [2021-06-05 22:00:51,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:00:51,630 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:51,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:51,630 INFO L225 Difference]: With dead ends: 257 [2021-06-05 22:00:51,630 INFO L226 Difference]: Without dead ends: 244 [2021-06-05 22:00:51,630 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 598.1ms TimeCoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:00:51,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-06-05 22:00:51,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 225. [2021-06-05 22:00:51,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.205357142857143) internal successors, (494), 224 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:51,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 494 transitions. [2021-06-05 22:00:51,632 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 494 transitions. Word has length 20 [2021-06-05 22:00:51,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:51,632 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 494 transitions. [2021-06-05 22:00:51,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:51,632 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 494 transitions. [2021-06-05 22:00:51,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:51,633 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:51,633 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:51,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 683 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3473 [2021-06-05 22:00:51,833 INFO L430 AbstractCegarLoop]: === Iteration 689 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:51,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:51,833 INFO L82 PathProgramCache]: Analyzing trace with hash 409285994, now seen corresponding path program 683 times [2021-06-05 22:00:51,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:51,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649341235] [2021-06-05 22:00:51,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:51,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:52,054 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:52,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:52,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649341235] [2021-06-05 22:00:52,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649341235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:52,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62142671] [2021-06-05 22:00:52,054 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 684 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 684 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:52,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:00:52,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:52,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:00:52,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:52,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:52,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:52,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:52,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:52,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:52,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:52,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:52,275 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:52,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:52,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:52,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:52,279 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:52,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:52,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:52,282 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:52,343 INFO L628 ElimStorePlain]: treesize reduction 80, result has 44.4 percent of original size [2021-06-05 22:00:52,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:52,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:52,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:00:52,348 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:52,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:52,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:00:52,352 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:52,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:52,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:00:52,379 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 22:00:52,464 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:52,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62142671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:52,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:52,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:52,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054553572] [2021-06-05 22:00:52,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:52,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:52,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:52,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:52,464 INFO L87 Difference]: Start difference. First operand 225 states and 494 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:52,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:52,881 INFO L93 Difference]: Finished difference Result 277 states and 578 transitions. [2021-06-05 22:00:52,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:00:52,882 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:52,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:52,882 INFO L225 Difference]: With dead ends: 277 [2021-06-05 22:00:52,882 INFO L226 Difference]: Without dead ends: 258 [2021-06-05 22:00:52,882 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 586.2ms TimeCoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:00:52,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-06-05 22:00:52,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 222. [2021-06-05 22:00:52,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.2036199095022626) internal successors, (487), 221 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:52,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 487 transitions. [2021-06-05 22:00:52,884 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 487 transitions. Word has length 20 [2021-06-05 22:00:52,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:52,884 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 487 transitions. [2021-06-05 22:00:52,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:52,884 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 487 transitions. [2021-06-05 22:00:52,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:52,884 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:52,884 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:53,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 684 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3474 [2021-06-05 22:00:53,085 INFO L430 AbstractCegarLoop]: === Iteration 690 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:53,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:53,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1820264674, now seen corresponding path program 684 times [2021-06-05 22:00:53,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:53,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997466588] [2021-06-05 22:00:53,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:53,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:53,295 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:53,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:53,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997466588] [2021-06-05 22:00:53,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997466588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:53,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839985739] [2021-06-05 22:00:53,295 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 685 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 685 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:53,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:00:53,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:53,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:00:53,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:53,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:53,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:53,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:00:53,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:53,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:53,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:00:53,497 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:53,519 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-06-05 22:00:53,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:53,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:00:53,526 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:53,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:53,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:00:53,535 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:00:53,581 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:53,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839985739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:53,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:53,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:53,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879607991] [2021-06-05 22:00:53,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:53,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:53,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:53,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:53,581 INFO L87 Difference]: Start difference. First operand 222 states and 487 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:53,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:53,793 INFO L93 Difference]: Finished difference Result 244 states and 522 transitions. [2021-06-05 22:00:53,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:00:53,794 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:53,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:53,794 INFO L225 Difference]: With dead ends: 244 [2021-06-05 22:00:53,794 INFO L226 Difference]: Without dead ends: 228 [2021-06-05 22:00:53,794 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 433.5ms TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:00:53,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-06-05 22:00:53,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 224. [2021-06-05 22:00:53,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.201793721973094) internal successors, (491), 223 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:53,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 491 transitions. [2021-06-05 22:00:53,796 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 491 transitions. Word has length 20 [2021-06-05 22:00:53,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:53,796 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 491 transitions. [2021-06-05 22:00:53,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:53,796 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 491 transitions. [2021-06-05 22:00:53,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:53,796 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:53,796 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:53,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3477,685 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:53,997 INFO L430 AbstractCegarLoop]: === Iteration 691 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:53,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:53,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1612697558, now seen corresponding path program 685 times [2021-06-05 22:00:53,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:53,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845073864] [2021-06-05 22:00:53,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:54,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:54,205 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:54,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:54,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845073864] [2021-06-05 22:00:54,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845073864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:54,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994428569] [2021-06-05 22:00:54,205 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 686 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 686 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:54,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:54,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:00:54,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:54,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:54,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:54,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:00:54,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:54,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:54,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:00:54,426 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:54,448 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-06-05 22:00:54,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:54,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:00:54,451 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:54,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:54,459 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:00:54,459 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:00:54,501 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:54,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994428569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:54,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:54,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:54,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243361852] [2021-06-05 22:00:54,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:54,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:54,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:54,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:54,502 INFO L87 Difference]: Start difference. First operand 224 states and 491 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:54,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:54,888 INFO L93 Difference]: Finished difference Result 246 states and 530 transitions. [2021-06-05 22:00:54,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:00:54,889 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:54,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:54,889 INFO L225 Difference]: With dead ends: 246 [2021-06-05 22:00:54,889 INFO L226 Difference]: Without dead ends: 233 [2021-06-05 22:00:54,889 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 536.4ms TimeCoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:00:54,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-06-05 22:00:54,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 225. [2021-06-05 22:00:54,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.200892857142857) internal successors, (493), 224 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:54,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 493 transitions. [2021-06-05 22:00:54,891 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 493 transitions. Word has length 20 [2021-06-05 22:00:54,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:54,891 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 493 transitions. [2021-06-05 22:00:54,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:54,891 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 493 transitions. [2021-06-05 22:00:54,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:54,891 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:54,891 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:55,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3478,686 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:55,092 INFO L430 AbstractCegarLoop]: === Iteration 692 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:55,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:55,092 INFO L82 PathProgramCache]: Analyzing trace with hash -476512286, now seen corresponding path program 686 times [2021-06-05 22:00:55,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:55,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533540076] [2021-06-05 22:00:55,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:55,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:55,315 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:55,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:55,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533540076] [2021-06-05 22:00:55,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533540076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:55,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959084273] [2021-06-05 22:00:55,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 687 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 687 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:55,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:00:55,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:55,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:00:55,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:55,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:55,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:55,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:55,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:55,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:55,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:55,503 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:55,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:55,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:55,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:55,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:00:55,529 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:55,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:55,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:00:55,533 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:55,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:55,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:00:55,554 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 22:00:55,634 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:55,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959084273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:55,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:55,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:55,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192758626] [2021-06-05 22:00:55,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:55,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:55,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:55,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:55,635 INFO L87 Difference]: Start difference. First operand 225 states and 493 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:56,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:56,074 INFO L93 Difference]: Finished difference Result 266 states and 562 transitions. [2021-06-05 22:00:56,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:00:56,074 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:56,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:56,074 INFO L225 Difference]: With dead ends: 266 [2021-06-05 22:00:56,074 INFO L226 Difference]: Without dead ends: 250 [2021-06-05 22:00:56,075 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 592.6ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:00:56,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-06-05 22:00:56,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 224. [2021-06-05 22:00:56,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.201793721973094) internal successors, (491), 223 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:56,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 491 transitions. [2021-06-05 22:00:56,076 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 491 transitions. Word has length 20 [2021-06-05 22:00:56,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:56,076 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 491 transitions. [2021-06-05 22:00:56,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:56,077 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 491 transitions. [2021-06-05 22:00:56,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:56,077 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:56,077 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:56,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3479,687 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:56,277 INFO L430 AbstractCegarLoop]: === Iteration 693 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:56,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:56,277 INFO L82 PathProgramCache]: Analyzing trace with hash 575485618, now seen corresponding path program 687 times [2021-06-05 22:00:56,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:56,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3187989] [2021-06-05 22:00:56,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:56,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:56,480 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:56,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:56,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3187989] [2021-06-05 22:00:56,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3187989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:56,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449507454] [2021-06-05 22:00:56,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 688 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 688 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:56,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:00:56,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:56,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:00:56,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:56,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:56,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:56,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:00:56,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:56,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:56,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:00:56,682 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:56,706 INFO L628 ElimStorePlain]: treesize reduction 42, result has 44.0 percent of original size [2021-06-05 22:00:56,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:56,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:00:56,709 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:56,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:56,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:00:56,716 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:00:56,757 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:56,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449507454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:56,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:56,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:56,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523265536] [2021-06-05 22:00:56,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:56,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:56,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:56,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:56,758 INFO L87 Difference]: Start difference. First operand 224 states and 491 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:57,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:57,063 INFO L93 Difference]: Finished difference Result 247 states and 532 transitions. [2021-06-05 22:00:57,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:00:57,063 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:57,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:57,064 INFO L225 Difference]: With dead ends: 247 [2021-06-05 22:00:57,064 INFO L226 Difference]: Without dead ends: 234 [2021-06-05 22:00:57,064 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 463.2ms TimeCoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:00:57,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-06-05 22:00:57,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 226. [2021-06-05 22:00:57,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.2) internal successors, (495), 225 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:57,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 495 transitions. [2021-06-05 22:00:57,066 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 495 transitions. Word has length 20 [2021-06-05 22:00:57,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:57,066 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 495 transitions. [2021-06-05 22:00:57,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:57,066 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 495 transitions. [2021-06-05 22:00:57,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:57,066 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:57,066 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:57,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3482,688 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:57,267 INFO L430 AbstractCegarLoop]: === Iteration 694 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:57,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:57,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1711670890, now seen corresponding path program 688 times [2021-06-05 22:00:57,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:57,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30628206] [2021-06-05 22:00:57,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:57,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:57,489 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:57,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:57,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30628206] [2021-06-05 22:00:57,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30628206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:57,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837315390] [2021-06-05 22:00:57,489 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 689 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 689 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:57,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:00:57,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:57,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:00:57,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:57,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:57,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:57,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:57,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:57,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:57,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:57,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:57,697 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:57,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:57,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:57,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:57,701 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:57,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:57,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:57,705 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:57,762 INFO L628 ElimStorePlain]: treesize reduction 80, result has 46.7 percent of original size [2021-06-05 22:00:57,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:57,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:57,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:00:57,766 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:57,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:57,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:00:57,770 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:57,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:57,794 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:00:57,794 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 22:00:57,878 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:57,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837315390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:57,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:57,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:57,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971909975] [2021-06-05 22:00:57,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:57,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:57,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:57,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:57,878 INFO L87 Difference]: Start difference. First operand 226 states and 495 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:58,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:58,330 INFO L93 Difference]: Finished difference Result 268 states and 563 transitions. [2021-06-05 22:00:58,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:00:58,330 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:58,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:58,330 INFO L225 Difference]: With dead ends: 268 [2021-06-05 22:00:58,330 INFO L226 Difference]: Without dead ends: 249 [2021-06-05 22:00:58,331 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 657.0ms TimeCoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:00:58,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-06-05 22:00:58,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 225. [2021-06-05 22:00:58,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.200892857142857) internal successors, (493), 224 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:58,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 493 transitions. [2021-06-05 22:00:58,332 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 493 transitions. Word has length 20 [2021-06-05 22:00:58,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:58,332 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 493 transitions. [2021-06-05 22:00:58,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:58,333 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 493 transitions. [2021-06-05 22:00:58,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:58,333 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:58,333 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:58,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 689 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3483 [2021-06-05 22:00:58,533 INFO L430 AbstractCegarLoop]: === Iteration 695 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:58,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:58,533 INFO L82 PathProgramCache]: Analyzing trace with hash -434499870, now seen corresponding path program 689 times [2021-06-05 22:00:58,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:58,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131281089] [2021-06-05 22:00:58,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:58,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:00:58,773 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:58,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:00:58,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131281089] [2021-06-05 22:00:58,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131281089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:58,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576031765] [2021-06-05 22:00:58,773 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 690 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 690 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:58,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:00:58,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:00:58,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:00:58,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:00:58,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:58,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:58,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:58,973 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:58,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:58,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:58,977 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:59,039 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-06-05 22:00:59,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:59,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:00:59,043 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:59,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:59,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:59,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:00:59,071 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:00:59,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:59,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:00:59,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:00:59,097 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:00:59,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:00:59,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:00:59,121 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:00:59,206 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:00:59,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576031765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:00:59,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:00:59,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:00:59,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538858683] [2021-06-05 22:00:59,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:00:59,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:00:59,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:00:59,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:00:59,207 INFO L87 Difference]: Start difference. First operand 225 states and 493 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:59,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:00:59,622 INFO L93 Difference]: Finished difference Result 279 states and 590 transitions. [2021-06-05 22:00:59,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:00:59,622 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:00:59,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:00:59,623 INFO L225 Difference]: With dead ends: 279 [2021-06-05 22:00:59,623 INFO L226 Difference]: Without dead ends: 260 [2021-06-05 22:00:59,623 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 614.0ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:00:59,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-06-05 22:00:59,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 224. [2021-06-05 22:00:59,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.201793721973094) internal successors, (491), 223 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:59,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 491 transitions. [2021-06-05 22:00:59,625 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 491 transitions. Word has length 20 [2021-06-05 22:00:59,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:00:59,625 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 491 transitions. [2021-06-05 22:00:59,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:00:59,625 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 491 transitions. [2021-06-05 22:00:59,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:00:59,625 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:00:59,625 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:00:59,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3486,690 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:00:59,825 INFO L430 AbstractCegarLoop]: === Iteration 696 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:00:59,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:00:59,826 INFO L82 PathProgramCache]: Analyzing trace with hash 905087274, now seen corresponding path program 690 times [2021-06-05 22:00:59,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:00:59,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762854285] [2021-06-05 22:00:59,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:00:59,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:00,030 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:00,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:00,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762854285] [2021-06-05 22:01:00,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762854285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:00,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539654762] [2021-06-05 22:01:00,031 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 691 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 691 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:00,059 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:01:00,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:00,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:01:00,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:00,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:00,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:01:00,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:00,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:00,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:00,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:01:00,278 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:00,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:00,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:01:00,284 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-06-05 22:01:00,325 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:00,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539654762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:00,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:00,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:00,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609099022] [2021-06-05 22:01:00,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:00,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:00,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:00,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:00,326 INFO L87 Difference]: Start difference. First operand 224 states and 491 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:00,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:00,619 INFO L93 Difference]: Finished difference Result 248 states and 532 transitions. [2021-06-05 22:01:00,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:01:00,620 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:00,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:00,620 INFO L225 Difference]: With dead ends: 248 [2021-06-05 22:01:00,620 INFO L226 Difference]: Without dead ends: 241 [2021-06-05 22:01:00,620 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 456.1ms TimeCoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:01:00,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-06-05 22:01:00,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 226. [2021-06-05 22:01:00,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.2044444444444444) internal successors, (496), 225 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:00,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 496 transitions. [2021-06-05 22:01:00,622 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 496 transitions. Word has length 20 [2021-06-05 22:01:00,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:00,622 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 496 transitions. [2021-06-05 22:01:00,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:00,622 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 496 transitions. [2021-06-05 22:01:00,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:00,623 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:00,623 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:00,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3491,691 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:00,823 INFO L430 AbstractCegarLoop]: === Iteration 697 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:00,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:00,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1857440482, now seen corresponding path program 691 times [2021-06-05 22:01:00,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:00,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083625957] [2021-06-05 22:01:00,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:00,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:00,998 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:00,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:00,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083625957] [2021-06-05 22:01:00,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083625957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:00,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105521450] [2021-06-05 22:01:00,999 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 692 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 692 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:01,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:01,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:01,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:01,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:01,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:01,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:01:01,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:01,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:01,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:01:01,231 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:01,259 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-06-05 22:01:01,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:01,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:01:01,262 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:01,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:01,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:01:01,271 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:01:01,314 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:01,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105521450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:01,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:01,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:01:01,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420206025] [2021-06-05 22:01:01,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:01:01,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:01,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:01:01,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:01:01,315 INFO L87 Difference]: Start difference. First operand 226 states and 496 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:01,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:01,717 INFO L93 Difference]: Finished difference Result 252 states and 537 transitions. [2021-06-05 22:01:01,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:01:01,717 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:01,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:01,717 INFO L225 Difference]: With dead ends: 252 [2021-06-05 22:01:01,717 INFO L226 Difference]: Without dead ends: 236 [2021-06-05 22:01:01,718 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 523.7ms TimeCoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:01:01,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-06-05 22:01:01,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 227. [2021-06-05 22:01:01,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.2035398230088497) internal successors, (498), 226 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:01,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 498 transitions. [2021-06-05 22:01:01,720 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 498 transitions. Word has length 20 [2021-06-05 22:01:01,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:01,720 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 498 transitions. [2021-06-05 22:01:01,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:01,720 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 498 transitions. [2021-06-05 22:01:01,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:01,720 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:01,720 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:01,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 692 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3492 [2021-06-05 22:01:01,921 INFO L430 AbstractCegarLoop]: === Iteration 698 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:01,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:01,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1575521750, now seen corresponding path program 692 times [2021-06-05 22:01:01,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:01,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823232688] [2021-06-05 22:01:01,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:01,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:02,104 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:02,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:02,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823232688] [2021-06-05 22:01:02,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823232688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:02,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896126971] [2021-06-05 22:01:02,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 693 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 693 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:02,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:01:02,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:02,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:01:02,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:02,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:02,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:01:02,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:02,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:02,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:02,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:01:02,339 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:02,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:02,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:01:02,346 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-06-05 22:01:02,365 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:02,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896126971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:02,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:02,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 22:01:02,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122142889] [2021-06-05 22:01:02,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:01:02,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:02,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:01:02,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:01:02,366 INFO L87 Difference]: Start difference. First operand 227 states and 498 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:02,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:02,719 INFO L93 Difference]: Finished difference Result 254 states and 544 transitions. [2021-06-05 22:01:02,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:01:02,719 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:02,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:02,719 INFO L225 Difference]: With dead ends: 254 [2021-06-05 22:01:02,719 INFO L226 Difference]: Without dead ends: 247 [2021-06-05 22:01:02,719 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 526.4ms TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:01:02,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-06-05 22:01:02,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 228. [2021-06-05 22:01:02,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.20704845814978) internal successors, (501), 227 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:02,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 501 transitions. [2021-06-05 22:01:02,721 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 501 transitions. Word has length 20 [2021-06-05 22:01:02,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:02,721 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 501 transitions. [2021-06-05 22:01:02,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:02,721 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 501 transitions. [2021-06-05 22:01:02,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:02,722 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:02,722 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:02,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 693 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3493 [2021-06-05 22:01:02,922 INFO L430 AbstractCegarLoop]: === Iteration 699 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:02,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:02,922 INFO L82 PathProgramCache]: Analyzing trace with hash -439336478, now seen corresponding path program 693 times [2021-06-05 22:01:02,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:02,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360157564] [2021-06-05 22:01:02,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:02,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:03,155 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:03,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:03,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360157564] [2021-06-05 22:01:03,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360157564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:03,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520718728] [2021-06-05 22:01:03,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 694 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 694 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:03,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:01:03,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:03,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:01:03,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:03,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:03,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:03,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:03,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:03,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:03,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:03,363 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:03,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:03,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:03,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:03,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:01:03,388 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:03,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:03,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:01:03,392 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:03,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:03,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:01:03,413 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 22:01:03,490 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:03,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520718728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:03,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:03,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:01:03,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897238303] [2021-06-05 22:01:03,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:01:03,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:03,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:01:03,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:01:03,491 INFO L87 Difference]: Start difference. First operand 228 states and 501 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:04,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:04,044 INFO L93 Difference]: Finished difference Result 281 states and 590 transitions. [2021-06-05 22:01:04,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:01:04,044 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:04,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:04,045 INFO L225 Difference]: With dead ends: 281 [2021-06-05 22:01:04,045 INFO L226 Difference]: Without dead ends: 265 [2021-06-05 22:01:04,045 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 751.2ms TimeCoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:01:04,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-06-05 22:01:04,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 225. [2021-06-05 22:01:04,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.200892857142857) internal successors, (493), 224 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:04,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 493 transitions. [2021-06-05 22:01:04,047 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 493 transitions. Word has length 20 [2021-06-05 22:01:04,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:04,047 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 493 transitions. [2021-06-05 22:01:04,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:04,047 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 493 transitions. [2021-06-05 22:01:04,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:04,047 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:04,047 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:04,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3494,694 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:04,248 INFO L430 AbstractCegarLoop]: === Iteration 700 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:04,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:04,248 INFO L82 PathProgramCache]: Analyzing trace with hash 971642202, now seen corresponding path program 694 times [2021-06-05 22:01:04,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:04,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62360679] [2021-06-05 22:01:04,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:04,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:04,437 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:04,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:04,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62360679] [2021-06-05 22:01:04,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62360679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:04,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195929418] [2021-06-05 22:01:04,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 695 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 695 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:04,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:01:04,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:04,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:04,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:04,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:04,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:04,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:01:04,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:04,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:04,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:01:04,659 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:04,682 INFO L628 ElimStorePlain]: treesize reduction 42, result has 44.0 percent of original size [2021-06-05 22:01:04,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:04,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:01:04,685 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:04,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:04,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:01:04,693 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:01:04,735 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:04,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195929418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:04,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:04,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:04,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774181181] [2021-06-05 22:01:04,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:04,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:04,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:04,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:04,736 INFO L87 Difference]: Start difference. First operand 225 states and 493 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:04,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:04,955 INFO L93 Difference]: Finished difference Result 246 states and 526 transitions. [2021-06-05 22:01:04,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:01:04,955 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:04,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:04,955 INFO L225 Difference]: With dead ends: 246 [2021-06-05 22:01:04,955 INFO L226 Difference]: Without dead ends: 230 [2021-06-05 22:01:04,956 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 455.1ms TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:01:04,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-06-05 22:01:04,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 227. [2021-06-05 22:01:04,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.1991150442477876) internal successors, (497), 226 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:04,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 497 transitions. [2021-06-05 22:01:04,957 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 497 transitions. Word has length 20 [2021-06-05 22:01:04,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:04,957 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 497 transitions. [2021-06-05 22:01:04,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:04,957 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 497 transitions. [2021-06-05 22:01:04,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:04,958 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:04,958 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:05,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3497,695 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:05,158 INFO L430 AbstractCegarLoop]: === Iteration 701 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:05,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:05,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1833647266, now seen corresponding path program 695 times [2021-06-05 22:01:05,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:05,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103466646] [2021-06-05 22:01:05,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:05,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:05,360 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:05,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:05,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103466646] [2021-06-05 22:01:05,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103466646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:05,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260908775] [2021-06-05 22:01:05,360 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 696 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 696 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:05,387 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:01:05,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:05,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:05,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:05,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:05,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:05,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:01:05,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:05,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:05,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:01:05,584 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:05,607 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-06-05 22:01:05,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:05,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:01:05,610 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:05,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:05,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:01:05,619 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:01:05,658 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:05,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260908775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:05,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:05,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:01:05,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819125332] [2021-06-05 22:01:05,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:01:05,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:05,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:01:05,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:01:05,659 INFO L87 Difference]: Start difference. First operand 227 states and 497 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:06,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:06,148 INFO L93 Difference]: Finished difference Result 247 states and 532 transitions. [2021-06-05 22:01:06,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:01:06,148 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:06,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:06,148 INFO L225 Difference]: With dead ends: 247 [2021-06-05 22:01:06,148 INFO L226 Difference]: Without dead ends: 234 [2021-06-05 22:01:06,148 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 585.3ms TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:01:06,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-06-05 22:01:06,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 228. [2021-06-05 22:01:06,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.198237885462555) internal successors, (499), 227 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:06,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 499 transitions. [2021-06-05 22:01:06,150 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 499 transitions. Word has length 20 [2021-06-05 22:01:06,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:06,150 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 499 transitions. [2021-06-05 22:01:06,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:06,150 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 499 transitions. [2021-06-05 22:01:06,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:06,151 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:06,151 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:06,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3498,696 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:06,351 INFO L430 AbstractCegarLoop]: === Iteration 702 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:06,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:06,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1325134758, now seen corresponding path program 696 times [2021-06-05 22:01:06,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:06,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426178364] [2021-06-05 22:01:06,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:06,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:06,517 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:06,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:06,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426178364] [2021-06-05 22:01:06,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426178364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:06,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588504233] [2021-06-05 22:01:06,517 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 697 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 697 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:06,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:01:06,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:06,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:01:06,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:06,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:06,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:06,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:06,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:06,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:06,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:06,705 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:06,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:06,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:06,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:06,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:01:06,731 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:06,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:06,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:01:06,735 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:06,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:06,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:01:06,758 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 22:01:06,833 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:06,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588504233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:06,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:06,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:01:06,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112718874] [2021-06-05 22:01:06,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:01:06,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:06,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:01:06,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:01:06,833 INFO L87 Difference]: Start difference. First operand 228 states and 499 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:07,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:07,311 INFO L93 Difference]: Finished difference Result 267 states and 564 transitions. [2021-06-05 22:01:07,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:01:07,311 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:07,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:07,312 INFO L225 Difference]: With dead ends: 267 [2021-06-05 22:01:07,312 INFO L226 Difference]: Without dead ends: 251 [2021-06-05 22:01:07,312 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 558.3ms TimeCoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:01:07,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-06-05 22:01:07,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 226. [2021-06-05 22:01:07,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.2) internal successors, (495), 225 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:07,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 495 transitions. [2021-06-05 22:01:07,314 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 495 transitions. Word has length 20 [2021-06-05 22:01:07,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:07,314 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 495 transitions. [2021-06-05 22:01:07,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:07,314 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 495 transitions. [2021-06-05 22:01:07,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:07,314 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:07,314 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:07,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3499,697 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:07,525 INFO L430 AbstractCegarLoop]: === Iteration 703 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:07,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:07,525 INFO L82 PathProgramCache]: Analyzing trace with hash -273136854, now seen corresponding path program 697 times [2021-06-05 22:01:07,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:07,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338928533] [2021-06-05 22:01:07,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:07,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:07,701 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:07,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:07,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338928533] [2021-06-05 22:01:07,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338928533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:07,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496133311] [2021-06-05 22:01:07,701 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 698 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 698 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:07,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:07,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:07,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:07,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:07,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:07,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:01:07,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:07,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:07,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:01:07,893 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:07,917 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-06-05 22:01:07,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:07,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:01:07,921 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:07,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:07,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:01:07,929 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:01:07,970 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:07,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496133311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:07,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:07,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:07,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55942553] [2021-06-05 22:01:07,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:07,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:07,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:07,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:07,971 INFO L87 Difference]: Start difference. First operand 226 states and 495 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:08,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:08,282 INFO L93 Difference]: Finished difference Result 251 states and 540 transitions. [2021-06-05 22:01:08,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:01:08,282 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:08,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:08,282 INFO L225 Difference]: With dead ends: 251 [2021-06-05 22:01:08,282 INFO L226 Difference]: Without dead ends: 238 [2021-06-05 22:01:08,283 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 441.4ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:01:08,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-06-05 22:01:08,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 228. [2021-06-05 22:01:08,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.198237885462555) internal successors, (499), 227 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:08,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 499 transitions. [2021-06-05 22:01:08,284 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 499 transitions. Word has length 20 [2021-06-05 22:01:08,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:08,284 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 499 transitions. [2021-06-05 22:01:08,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:08,285 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 499 transitions. [2021-06-05 22:01:08,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:08,285 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:08,285 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:08,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3502,698 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:08,485 INFO L430 AbstractCegarLoop]: === Iteration 704 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:08,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:08,485 INFO L82 PathProgramCache]: Analyzing trace with hash 863048418, now seen corresponding path program 698 times [2021-06-05 22:01:08,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:08,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845465255] [2021-06-05 22:01:08,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:08,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:08,729 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:08,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:08,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845465255] [2021-06-05 22:01:08,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845465255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:08,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959487984] [2021-06-05 22:01:08,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 699 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 699 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:08,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:01:08,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:08,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:01:08,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:08,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:08,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:08,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:08,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:08,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:08,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:08,901 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:08,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:08,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:08,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:08,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:01:08,928 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:08,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:08,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:01:08,931 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:08,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:08,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:01:08,953 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 22:01:09,033 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:09,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959487984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:09,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:09,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:09,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039556643] [2021-06-05 22:01:09,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:09,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:09,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:09,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:09,034 INFO L87 Difference]: Start difference. First operand 228 states and 499 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:09,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:09,483 INFO L93 Difference]: Finished difference Result 270 states and 570 transitions. [2021-06-05 22:01:09,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:01:09,483 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:09,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:09,484 INFO L225 Difference]: With dead ends: 270 [2021-06-05 22:01:09,484 INFO L226 Difference]: Without dead ends: 254 [2021-06-05 22:01:09,484 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 665.0ms TimeCoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:01:09,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-06-05 22:01:09,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 227. [2021-06-05 22:01:09,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.1991150442477876) internal successors, (497), 226 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:09,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 497 transitions. [2021-06-05 22:01:09,486 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 497 transitions. Word has length 20 [2021-06-05 22:01:09,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:09,486 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 497 transitions. [2021-06-05 22:01:09,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:09,486 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 497 transitions. [2021-06-05 22:01:09,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:09,486 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:09,486 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:09,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 699 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3503 [2021-06-05 22:01:09,687 INFO L430 AbstractCegarLoop]: === Iteration 705 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:09,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:09,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1283122342, now seen corresponding path program 699 times [2021-06-05 22:01:09,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:09,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334672806] [2021-06-05 22:01:09,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:09,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:09,917 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:09,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:09,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334672806] [2021-06-05 22:01:09,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334672806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:09,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106639801] [2021-06-05 22:01:09,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 700 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 700 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:09,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:01:09,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:09,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:01:09,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:10,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:10,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:10,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:10,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:10,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:10,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:10,105 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:10,162 INFO L628 ElimStorePlain]: treesize reduction 75, result has 45.3 percent of original size [2021-06-05 22:01:10,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:10,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:01:10,166 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:10,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:10,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:10,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:10,191 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:10,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:10,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:10,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:01:10,214 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:10,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:10,233 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:01:10,234 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:153, output treesize:32 [2021-06-05 22:01:10,311 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:10,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106639801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:10,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:10,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:10,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633837587] [2021-06-05 22:01:10,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:10,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:10,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:10,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:10,311 INFO L87 Difference]: Start difference. First operand 227 states and 497 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:10,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:10,859 INFO L93 Difference]: Finished difference Result 281 states and 594 transitions. [2021-06-05 22:01:10,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:01:10,860 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:10,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:10,860 INFO L225 Difference]: With dead ends: 281 [2021-06-05 22:01:10,860 INFO L226 Difference]: Without dead ends: 262 [2021-06-05 22:01:10,860 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 654.0ms TimeCoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:01:10,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-05 22:01:10,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 227. [2021-06-05 22:01:10,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.1991150442477876) internal successors, (497), 226 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:10,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 497 transitions. [2021-06-05 22:01:10,862 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 497 transitions. Word has length 20 [2021-06-05 22:01:10,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:10,862 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 497 transitions. [2021-06-05 22:01:10,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:10,862 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 497 transitions. [2021-06-05 22:01:10,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:10,862 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:10,862 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:11,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 700 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3506 [2021-06-05 22:01:11,063 INFO L430 AbstractCegarLoop]: === Iteration 706 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:11,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:11,063 INFO L82 PathProgramCache]: Analyzing trace with hash -718300702, now seen corresponding path program 700 times [2021-06-05 22:01:11,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:11,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925492174] [2021-06-05 22:01:11,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:11,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:11,204 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:11,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:11,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925492174] [2021-06-05 22:01:11,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925492174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:11,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251345696] [2021-06-05 22:01:11,204 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 701 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 701 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:11,230 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:01:11,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:11,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:11,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:11,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:11,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:11,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:01:11,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:11,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:11,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:01:11,417 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:11,439 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-06-05 22:01:11,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:11,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:01:11,442 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:11,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:11,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:01:11,450 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:01:11,486 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:11,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251345696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:11,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:11,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:01:11,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458449628] [2021-06-05 22:01:11,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:01:11,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:11,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:01:11,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:01:11,486 INFO L87 Difference]: Start difference. First operand 227 states and 497 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:11,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:11,921 INFO L93 Difference]: Finished difference Result 257 states and 552 transitions. [2021-06-05 22:01:11,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:01:11,921 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:11,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:11,921 INFO L225 Difference]: With dead ends: 257 [2021-06-05 22:01:11,921 INFO L226 Difference]: Without dead ends: 241 [2021-06-05 22:01:11,922 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 508.2ms TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:01:11,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-06-05 22:01:11,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 229. [2021-06-05 22:01:11,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.1973684210526314) internal successors, (501), 228 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:11,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 501 transitions. [2021-06-05 22:01:11,923 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 501 transitions. Word has length 20 [2021-06-05 22:01:11,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:11,923 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 501 transitions. [2021-06-05 22:01:11,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:11,923 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 501 transitions. [2021-06-05 22:01:11,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:11,924 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:11,924 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:12,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3511,701 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:12,124 INFO L430 AbstractCegarLoop]: === Iteration 707 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:12,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:12,124 INFO L82 PathProgramCache]: Analyzing trace with hash 143704362, now seen corresponding path program 701 times [2021-06-05 22:01:12,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:12,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758675497] [2021-06-05 22:01:12,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:12,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:12,301 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:12,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:12,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758675497] [2021-06-05 22:01:12,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758675497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:12,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384330629] [2021-06-05 22:01:12,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 702 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 702 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:12,327 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:01:12,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:12,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:12,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:12,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:12,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:12,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:01:12,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:12,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:12,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:01:12,510 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:12,532 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-06-05 22:01:12,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:12,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:01:12,535 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:12,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:12,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:01:12,543 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:01:12,578 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:12,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384330629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:12,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:12,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:01:12,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390657336] [2021-06-05 22:01:12,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:01:12,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:12,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:01:12,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:01:12,579 INFO L87 Difference]: Start difference. First operand 229 states and 501 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:12,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:12,894 INFO L93 Difference]: Finished difference Result 249 states and 533 transitions. [2021-06-05 22:01:12,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:01:12,894 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:12,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:12,894 INFO L225 Difference]: With dead ends: 249 [2021-06-05 22:01:12,894 INFO L226 Difference]: Without dead ends: 236 [2021-06-05 22:01:12,895 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 516.0ms TimeCoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:01:12,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-06-05 22:01:12,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 230. [2021-06-05 22:01:12,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.1965065502183405) internal successors, (503), 229 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:12,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 503 transitions. [2021-06-05 22:01:12,896 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 503 transitions. Word has length 20 [2021-06-05 22:01:12,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:12,896 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 503 transitions. [2021-06-05 22:01:12,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:12,896 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 503 transitions. [2021-06-05 22:01:12,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:12,897 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:12,897 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:13,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3512,702 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:13,097 INFO L430 AbstractCegarLoop]: === Iteration 708 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:13,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:13,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1279889634, now seen corresponding path program 702 times [2021-06-05 22:01:13,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:13,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250241676] [2021-06-05 22:01:13,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:13,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:13,322 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:13,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:13,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250241676] [2021-06-05 22:01:13,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250241676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:13,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58940598] [2021-06-05 22:01:13,323 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 703 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 703 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:13,349 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:01:13,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:13,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:13,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:13,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:13,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:13,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:13,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:13,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:13,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:13,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:13,522 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:13,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:13,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:13,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:13,525 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:13,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:13,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:13,529 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:13,585 INFO L628 ElimStorePlain]: treesize reduction 87, result has 40.8 percent of original size [2021-06-05 22:01:13,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:13,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:01:13,589 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:13,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:13,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:01:13,613 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:173, output treesize:36 [2021-06-05 22:01:13,695 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:13,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58940598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:13,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:13,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:13,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534714319] [2021-06-05 22:01:13,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:13,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:13,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:13,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:13,696 INFO L87 Difference]: Start difference. First operand 230 states and 503 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:14,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:14,297 INFO L93 Difference]: Finished difference Result 273 states and 573 transitions. [2021-06-05 22:01:14,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:01:14,297 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:14,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:14,297 INFO L225 Difference]: With dead ends: 273 [2021-06-05 22:01:14,297 INFO L226 Difference]: Without dead ends: 254 [2021-06-05 22:01:14,298 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 807.7ms TimeCoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:01:14,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-06-05 22:01:14,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 228. [2021-06-05 22:01:14,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.198237885462555) internal successors, (499), 227 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:14,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 499 transitions. [2021-06-05 22:01:14,299 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 499 transitions. Word has length 20 [2021-06-05 22:01:14,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:14,300 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 499 transitions. [2021-06-05 22:01:14,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:14,300 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 499 transitions. [2021-06-05 22:01:14,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:14,300 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:14,300 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:14,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 703 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3513 [2021-06-05 22:01:14,500 INFO L430 AbstractCegarLoop]: === Iteration 709 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:14,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:14,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1963079758, now seen corresponding path program 703 times [2021-06-05 22:01:14,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:14,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89259119] [2021-06-05 22:01:14,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:14,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:14,714 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:14,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:14,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89259119] [2021-06-05 22:01:14,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89259119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:14,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187021913] [2021-06-05 22:01:14,715 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 704 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 704 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:14,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:14,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:14,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:14,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:14,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:14,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:01:14,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:14,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:14,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:01:14,919 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:14,942 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-06-05 22:01:14,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:14,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:01:14,945 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:14,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:14,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:01:14,952 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:01:14,993 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:14,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187021913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:14,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:14,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:14,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435147158] [2021-06-05 22:01:14,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:14,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:14,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:14,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:14,993 INFO L87 Difference]: Start difference. First operand 228 states and 499 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:15,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:15,336 INFO L93 Difference]: Finished difference Result 252 states and 542 transitions. [2021-06-05 22:01:15,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:01:15,337 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:15,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:15,337 INFO L225 Difference]: With dead ends: 252 [2021-06-05 22:01:15,337 INFO L226 Difference]: Without dead ends: 239 [2021-06-05 22:01:15,337 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 532.3ms TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:01:15,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-06-05 22:01:15,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 230. [2021-06-05 22:01:15,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.1965065502183405) internal successors, (503), 229 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:15,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 503 transitions. [2021-06-05 22:01:15,339 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 503 transitions. Word has length 20 [2021-06-05 22:01:15,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:15,339 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 503 transitions. [2021-06-05 22:01:15,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:15,339 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 503 transitions. [2021-06-05 22:01:15,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:15,339 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:15,339 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:15,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3516,704 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:15,540 INFO L430 AbstractCegarLoop]: === Iteration 710 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:15,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:15,540 INFO L82 PathProgramCache]: Analyzing trace with hash -826894486, now seen corresponding path program 704 times [2021-06-05 22:01:15,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:15,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128100591] [2021-06-05 22:01:15,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:15,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:15,760 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:15,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:15,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128100591] [2021-06-05 22:01:15,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128100591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:15,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457380068] [2021-06-05 22:01:15,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 705 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 705 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:15,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:01:15,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:15,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:01:15,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:15,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:15,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:15,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:15,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:15,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:15,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:15,931 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:15,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:15,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:15,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:15,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:01:15,958 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:15,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:15,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:01:15,961 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:15,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:15,983 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:01:15,983 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 22:01:16,057 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:16,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457380068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:16,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:16,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:16,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315986428] [2021-06-05 22:01:16,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:16,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:16,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:16,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:16,057 INFO L87 Difference]: Start difference. First operand 230 states and 503 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:16,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:16,500 INFO L93 Difference]: Finished difference Result 250 states and 541 transitions. [2021-06-05 22:01:16,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:01:16,500 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:16,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:16,500 INFO L225 Difference]: With dead ends: 250 [2021-06-05 22:01:16,500 INFO L226 Difference]: Without dead ends: 243 [2021-06-05 22:01:16,501 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 603.5ms TimeCoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:01:16,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-06-05 22:01:16,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 229. [2021-06-05 22:01:16,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.1973684210526314) internal successors, (501), 228 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:16,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 501 transitions. [2021-06-05 22:01:16,502 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 501 transitions. Word has length 20 [2021-06-05 22:01:16,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:16,502 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 501 transitions. [2021-06-05 22:01:16,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:16,503 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 501 transitions. [2021-06-05 22:01:16,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:16,503 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:16,503 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:16,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 705 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3517 [2021-06-05 22:01:16,703 INFO L430 AbstractCegarLoop]: === Iteration 711 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:16,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:16,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1321902050, now seen corresponding path program 705 times [2021-06-05 22:01:16,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:16,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462866286] [2021-06-05 22:01:16,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:16,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:16,917 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:16,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:16,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462866286] [2021-06-05 22:01:16,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462866286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:16,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256618922] [2021-06-05 22:01:16,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 706 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 706 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:16,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:01:16,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:16,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:16,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:17,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:17,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:17,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:17,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:17,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:17,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:17,108 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:17,171 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-06-05 22:01:17,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:17,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:01:17,176 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:17,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:17,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:17,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:17,203 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:17,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:17,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:17,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:01:17,230 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:17,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:17,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:01:17,252 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:01:17,335 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:17,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256618922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:17,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:17,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:17,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866286800] [2021-06-05 22:01:17,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:17,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:17,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:17,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:17,335 INFO L87 Difference]: Start difference. First operand 229 states and 501 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:17,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:17,745 INFO L93 Difference]: Finished difference Result 287 states and 606 transitions. [2021-06-05 22:01:17,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:01:17,745 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:17,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:17,745 INFO L225 Difference]: With dead ends: 287 [2021-06-05 22:01:17,745 INFO L226 Difference]: Without dead ends: 268 [2021-06-05 22:01:17,745 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 556.4ms TimeCoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:01:17,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-06-05 22:01:17,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 229. [2021-06-05 22:01:17,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.1973684210526314) internal successors, (501), 228 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:17,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 501 transitions. [2021-06-05 22:01:17,749 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 501 transitions. Word has length 20 [2021-06-05 22:01:17,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:17,749 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 501 transitions. [2021-06-05 22:01:17,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:17,750 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 501 transitions. [2021-06-05 22:01:17,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:17,750 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:17,750 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:17,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3520,706 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:17,961 INFO L430 AbstractCegarLoop]: === Iteration 712 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:17,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:17,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1446089258, now seen corresponding path program 706 times [2021-06-05 22:01:17,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:17,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271782433] [2021-06-05 22:01:17,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:17,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:18,154 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:18,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:18,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271782433] [2021-06-05 22:01:18,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271782433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:18,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296925608] [2021-06-05 22:01:18,154 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 707 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 707 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:18,180 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:01:18,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:18,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:18,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:18,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:18,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:18,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:01:18,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:18,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:18,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:01:18,351 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:18,373 INFO L628 ElimStorePlain]: treesize reduction 36, result has 47.8 percent of original size [2021-06-05 22:01:18,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:18,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:01:18,376 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:18,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:18,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:01:18,383 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:01:18,424 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:18,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296925608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:18,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:18,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:18,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841870850] [2021-06-05 22:01:18,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:18,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:18,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:18,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:18,425 INFO L87 Difference]: Start difference. First operand 229 states and 501 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:18,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:18,710 INFO L93 Difference]: Finished difference Result 257 states and 552 transitions. [2021-06-05 22:01:18,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:01:18,710 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:18,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:18,711 INFO L225 Difference]: With dead ends: 257 [2021-06-05 22:01:18,711 INFO L226 Difference]: Without dead ends: 244 [2021-06-05 22:01:18,711 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 438.4ms TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:01:18,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-06-05 22:01:18,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 232. [2021-06-05 22:01:18,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.1948051948051948) internal successors, (507), 231 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:18,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 507 transitions. [2021-06-05 22:01:18,713 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 507 transitions. Word has length 20 [2021-06-05 22:01:18,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:18,713 INFO L482 AbstractCegarLoop]: Abstraction has 232 states and 507 transitions. [2021-06-05 22:01:18,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:18,713 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 507 transitions. [2021-06-05 22:01:18,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:18,713 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:18,713 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:18,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 707 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3525 [2021-06-05 22:01:18,913 INFO L430 AbstractCegarLoop]: === Iteration 713 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:18,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:18,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1712692766, now seen corresponding path program 707 times [2021-06-05 22:01:18,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:18,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677160419] [2021-06-05 22:01:18,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:18,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:19,155 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:19,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:19,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677160419] [2021-06-05 22:01:19,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677160419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:19,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16889387] [2021-06-05 22:01:19,156 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 708 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 708 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:19,182 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:01:19,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:19,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:19,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:19,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:19,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:19,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:19,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:19,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:19,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:19,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:19,349 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:19,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:19,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:19,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:19,353 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:19,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:19,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:19,357 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:19,417 INFO L628 ElimStorePlain]: treesize reduction 80, result has 46.7 percent of original size [2021-06-05 22:01:19,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:19,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:19,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:01:19,422 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:19,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:19,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:01:19,425 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:19,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:19,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:01:19,449 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 22:01:19,534 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:19,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16889387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:19,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:19,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:19,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564961896] [2021-06-05 22:01:19,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:19,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:19,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:19,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:19,535 INFO L87 Difference]: Start difference. First operand 232 states and 507 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:20,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:20,061 INFO L93 Difference]: Finished difference Result 278 states and 583 transitions. [2021-06-05 22:01:20,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:01:20,062 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:20,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:20,062 INFO L225 Difference]: With dead ends: 278 [2021-06-05 22:01:20,062 INFO L226 Difference]: Without dead ends: 259 [2021-06-05 22:01:20,062 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 661.0ms TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:01:20,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-06-05 22:01:20,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 231. [2021-06-05 22:01:20,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.1956521739130435) internal successors, (505), 230 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:20,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 505 transitions. [2021-06-05 22:01:20,064 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 505 transitions. Word has length 20 [2021-06-05 22:01:20,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:20,064 INFO L482 AbstractCegarLoop]: Abstraction has 231 states and 505 transitions. [2021-06-05 22:01:20,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:20,064 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 505 transitions. [2021-06-05 22:01:20,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:20,064 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:20,065 INFO L554 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:20,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3526,708 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:20,271 INFO L430 AbstractCegarLoop]: === Iteration 714 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:20,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:20,271 INFO L82 PathProgramCache]: Analyzing trace with hash 660035238, now seen corresponding path program 708 times [2021-06-05 22:01:20,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:20,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562817629] [2021-06-05 22:01:20,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:20,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:20,343 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:01:20,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:20,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562817629] [2021-06-05 22:01:20,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562817629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:20,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985329103] [2021-06-05 22:01:20,344 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 709 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 709 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:20,370 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:01:20,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:20,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:01:20,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:20,532 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:01:20,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985329103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:20,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:20,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:01:20,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301918692] [2021-06-05 22:01:20,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:01:20,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:20,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:01:20,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:01:20,533 INFO L87 Difference]: Start difference. First operand 231 states and 505 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:20,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:20,657 INFO L93 Difference]: Finished difference Result 279 states and 601 transitions. [2021-06-05 22:01:20,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:01:20,657 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:20,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:20,658 INFO L225 Difference]: With dead ends: 279 [2021-06-05 22:01:20,658 INFO L226 Difference]: Without dead ends: 279 [2021-06-05 22:01:20,658 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 162.5ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:01:20,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-06-05 22:01:20,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 231. [2021-06-05 22:01:20,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.1956521739130435) internal successors, (505), 230 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:20,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 505 transitions. [2021-06-05 22:01:20,660 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 505 transitions. Word has length 20 [2021-06-05 22:01:20,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:20,660 INFO L482 AbstractCegarLoop]: Abstraction has 231 states and 505 transitions. [2021-06-05 22:01:20,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:20,660 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 505 transitions. [2021-06-05 22:01:20,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:20,660 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:20,660 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:20,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3529,709 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:20,861 INFO L430 AbstractCegarLoop]: === Iteration 715 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:20,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:20,861 INFO L82 PathProgramCache]: Analyzing trace with hash 436103770, now seen corresponding path program 709 times [2021-06-05 22:01:20,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:20,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752876406] [2021-06-05 22:01:20,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:20,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:21,070 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:21,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:21,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752876406] [2021-06-05 22:01:21,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752876406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:21,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716293656] [2021-06-05 22:01:21,070 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 710 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 710 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:21,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:21,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:21,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:21,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:21,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:21,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:21,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:21,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:21,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:21,266 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:21,329 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-06-05 22:01:21,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:21,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:01:21,333 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:21,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:21,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:21,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:21,361 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:21,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:21,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:21,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:01:21,400 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:21,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:21,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:01:21,425 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:01:21,516 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:21,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716293656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:21,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:21,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:21,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919461444] [2021-06-05 22:01:21,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:21,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:21,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:21,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:21,517 INFO L87 Difference]: Start difference. First operand 231 states and 505 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:22,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:22,086 INFO L93 Difference]: Finished difference Result 287 states and 606 transitions. [2021-06-05 22:01:22,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:01:22,087 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:22,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:22,087 INFO L225 Difference]: With dead ends: 287 [2021-06-05 22:01:22,087 INFO L226 Difference]: Without dead ends: 268 [2021-06-05 22:01:22,087 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 715.3ms TimeCoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:01:22,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-06-05 22:01:22,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 230. [2021-06-05 22:01:22,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.1965065502183405) internal successors, (503), 229 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:22,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 503 transitions. [2021-06-05 22:01:22,089 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 503 transitions. Word has length 20 [2021-06-05 22:01:22,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:22,089 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 503 transitions. [2021-06-05 22:01:22,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:22,089 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 503 transitions. [2021-06-05 22:01:22,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:22,090 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:22,090 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:22,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3541,710 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:22,290 INFO L430 AbstractCegarLoop]: === Iteration 716 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:22,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:22,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1670680350, now seen corresponding path program 710 times [2021-06-05 22:01:22,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:22,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780431385] [2021-06-05 22:01:22,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:22,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:22,543 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:22,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:22,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780431385] [2021-06-05 22:01:22,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780431385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:22,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883827927] [2021-06-05 22:01:22,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 711 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 711 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:22,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:01:22,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:22,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:01:22,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:22,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:22,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:22,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:22,747 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:22,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:22,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:22,750 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:22,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:22,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:22,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:22,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:01:22,779 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:22,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:22,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:01:22,784 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:22,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:22,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:01:22,810 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 22:01:22,897 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:22,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883827927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:22,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:22,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:22,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260314817] [2021-06-05 22:01:22,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:22,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:22,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:22,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:22,898 INFO L87 Difference]: Start difference. First operand 230 states and 503 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:23,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:23,570 INFO L93 Difference]: Finished difference Result 269 states and 582 transitions. [2021-06-05 22:01:23,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:01:23,570 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:23,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:23,571 INFO L225 Difference]: With dead ends: 269 [2021-06-05 22:01:23,571 INFO L226 Difference]: Without dead ends: 260 [2021-06-05 22:01:23,571 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 736.9ms TimeCoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:01:23,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-06-05 22:01:23,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 230. [2021-06-05 22:01:23,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.1965065502183405) internal successors, (503), 229 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:23,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 503 transitions. [2021-06-05 22:01:23,573 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 503 transitions. Word has length 20 [2021-06-05 22:01:23,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:23,573 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 503 transitions. [2021-06-05 22:01:23,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:23,573 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 503 transitions. [2021-06-05 22:01:23,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:23,573 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:23,573 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:23,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3546,711 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:23,773 INFO L430 AbstractCegarLoop]: === Iteration 717 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:23,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:23,773 INFO L82 PathProgramCache]: Analyzing trace with hash 367594418, now seen corresponding path program 711 times [2021-06-05 22:01:23,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:23,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918212404] [2021-06-05 22:01:23,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:23,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:23,968 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:23,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:23,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918212404] [2021-06-05 22:01:23,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918212404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:23,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985125453] [2021-06-05 22:01:23,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 712 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 712 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:23,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:01:23,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:23,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:23,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:24,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:24,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:24,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:01:24,185 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:24,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:24,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:01:24,188 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:24,211 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-06-05 22:01:24,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:24,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:01:24,214 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:24,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:24,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:01:24,223 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:01:24,262 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:24,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985125453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:24,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:24,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:01:24,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681154761] [2021-06-05 22:01:24,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:01:24,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:24,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:01:24,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:01:24,263 INFO L87 Difference]: Start difference. First operand 230 states and 503 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:24,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:24,553 INFO L93 Difference]: Finished difference Result 268 states and 563 transitions. [2021-06-05 22:01:24,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:01:24,554 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:24,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:24,554 INFO L225 Difference]: With dead ends: 268 [2021-06-05 22:01:24,554 INFO L226 Difference]: Without dead ends: 237 [2021-06-05 22:01:24,554 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 441.2ms TimeCoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:01:24,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-06-05 22:01:24,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 234. [2021-06-05 22:01:24,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.1931330472103006) internal successors, (511), 233 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:24,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 511 transitions. [2021-06-05 22:01:24,556 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 511 transitions. Word has length 20 [2021-06-05 22:01:24,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:24,556 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 511 transitions. [2021-06-05 22:01:24,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:24,556 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 511 transitions. [2021-06-05 22:01:24,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:24,556 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:24,556 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:24,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 712 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3549 [2021-06-05 22:01:24,756 INFO L430 AbstractCegarLoop]: === Iteration 718 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:24,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:24,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1319947626, now seen corresponding path program 712 times [2021-06-05 22:01:24,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:24,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242514360] [2021-06-05 22:01:24,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:24,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:25,018 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:25,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:25,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242514360] [2021-06-05 22:01:25,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242514360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:25,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674550704] [2021-06-05 22:01:25,019 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 713 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 713 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:25,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:01:25,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:25,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:25,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:25,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:25,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:25,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:01:25,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:25,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:25,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:01:25,247 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:25,271 INFO L628 ElimStorePlain]: treesize reduction 42, result has 44.0 percent of original size [2021-06-05 22:01:25,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:25,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:01:25,273 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:25,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:25,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:01:25,280 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:01:25,322 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:25,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674550704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:25,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:25,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:25,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737451509] [2021-06-05 22:01:25,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:25,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:25,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:25,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:25,323 INFO L87 Difference]: Start difference. First operand 234 states and 511 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:25,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:25,675 INFO L93 Difference]: Finished difference Result 255 states and 544 transitions. [2021-06-05 22:01:25,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:01:25,676 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:25,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:25,676 INFO L225 Difference]: With dead ends: 255 [2021-06-05 22:01:25,676 INFO L226 Difference]: Without dead ends: 239 [2021-06-05 22:01:25,676 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 587.4ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:01:25,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-06-05 22:01:25,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 235. [2021-06-05 22:01:25,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.1923076923076925) internal successors, (513), 234 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:25,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 513 transitions. [2021-06-05 22:01:25,678 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 513 transitions. Word has length 20 [2021-06-05 22:01:25,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:25,678 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 513 transitions. [2021-06-05 22:01:25,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:25,678 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 513 transitions. [2021-06-05 22:01:25,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:25,678 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:25,678 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:25,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 713 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3550 [2021-06-05 22:01:25,879 INFO L430 AbstractCegarLoop]: === Iteration 719 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:25,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:25,879 INFO L82 PathProgramCache]: Analyzing trace with hash -2113014606, now seen corresponding path program 713 times [2021-06-05 22:01:25,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:25,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075766070] [2021-06-05 22:01:25,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:25,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:26,103 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:26,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:26,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075766070] [2021-06-05 22:01:26,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075766070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:26,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651637222] [2021-06-05 22:01:26,104 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 714 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 714 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:26,131 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:01:26,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:26,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:26,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:26,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:26,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:26,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:01:26,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:26,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:26,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:01:26,339 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:26,361 INFO L628 ElimStorePlain]: treesize reduction 36, result has 47.8 percent of original size [2021-06-05 22:01:26,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:26,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:01:26,364 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:26,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:26,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:01:26,372 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:01:26,423 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:26,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651637222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:26,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:26,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:26,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992392970] [2021-06-05 22:01:26,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:26,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:26,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:26,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:26,424 INFO L87 Difference]: Start difference. First operand 235 states and 513 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:26,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:26,951 INFO L93 Difference]: Finished difference Result 265 states and 565 transitions. [2021-06-05 22:01:26,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:01:26,951 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:26,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:26,952 INFO L225 Difference]: With dead ends: 265 [2021-06-05 22:01:26,952 INFO L226 Difference]: Without dead ends: 246 [2021-06-05 22:01:26,952 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 647.5ms TimeCoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:01:26,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-06-05 22:01:26,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 236. [2021-06-05 22:01:26,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.1914893617021276) internal successors, (515), 235 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:26,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 515 transitions. [2021-06-05 22:01:26,954 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 515 transitions. Word has length 20 [2021-06-05 22:01:26,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:26,954 INFO L482 AbstractCegarLoop]: Abstraction has 236 states and 515 transitions. [2021-06-05 22:01:26,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:26,954 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 515 transitions. [2021-06-05 22:01:26,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:26,954 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:26,954 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:27,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 714 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3551 [2021-06-05 22:01:27,154 INFO L430 AbstractCegarLoop]: === Iteration 720 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:27,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:27,155 INFO L82 PathProgramCache]: Analyzing trace with hash -976829334, now seen corresponding path program 714 times [2021-06-05 22:01:27,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:27,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418706669] [2021-06-05 22:01:27,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:27,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:27,354 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:27,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:27,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418706669] [2021-06-05 22:01:27,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418706669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:27,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171531003] [2021-06-05 22:01:27,354 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 715 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 715 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:27,381 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:01:27,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:27,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:27,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:27,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:27,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:27,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:27,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:27,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:27,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:27,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:27,568 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:27,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:27,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:27,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:27,572 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:27,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:27,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:27,575 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:27,631 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-06-05 22:01:27,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:27,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:27,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:01:27,636 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:27,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:27,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:01:27,639 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:27,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:27,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:01:27,663 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 22:01:27,747 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:27,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171531003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:27,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:27,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:01:27,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793154498] [2021-06-05 22:01:27,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:01:27,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:27,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:01:27,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:01:27,748 INFO L87 Difference]: Start difference. First operand 236 states and 515 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:28,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:28,237 INFO L93 Difference]: Finished difference Result 262 states and 557 transitions. [2021-06-05 22:01:28,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:01:28,237 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:28,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:28,237 INFO L225 Difference]: With dead ends: 262 [2021-06-05 22:01:28,237 INFO L226 Difference]: Without dead ends: 247 [2021-06-05 22:01:28,237 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 627.5ms TimeCoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:01:28,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-06-05 22:01:28,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 233. [2021-06-05 22:01:28,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.1939655172413794) internal successors, (509), 232 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:28,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 509 transitions. [2021-06-05 22:01:28,239 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 509 transitions. Word has length 20 [2021-06-05 22:01:28,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:28,239 INFO L482 AbstractCegarLoop]: Abstraction has 233 states and 509 transitions. [2021-06-05 22:01:28,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:28,239 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 509 transitions. [2021-06-05 22:01:28,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:28,240 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:28,240 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:28,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3552,715 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:28,440 INFO L430 AbstractCegarLoop]: === Iteration 721 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:28,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:28,440 INFO L82 PathProgramCache]: Analyzing trace with hash 434149346, now seen corresponding path program 715 times [2021-06-05 22:01:28,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:28,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182881568] [2021-06-05 22:01:28,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:28,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:28,627 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:28,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:28,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182881568] [2021-06-05 22:01:28,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182881568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:28,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154885750] [2021-06-05 22:01:28,628 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 716 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 716 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:28,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:28,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:28,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:28,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:28,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:28,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:01:28,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:28,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:28,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:01:28,836 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:28,859 INFO L628 ElimStorePlain]: treesize reduction 42, result has 44.0 percent of original size [2021-06-05 22:01:28,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:28,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:01:28,862 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:28,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:28,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:01:28,873 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:01:28,916 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:28,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154885750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:28,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:28,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:28,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660272567] [2021-06-05 22:01:28,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:28,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:28,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:28,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:28,917 INFO L87 Difference]: Start difference. First operand 233 states and 509 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:29,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:29,193 INFO L93 Difference]: Finished difference Result 255 states and 544 transitions. [2021-06-05 22:01:29,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:01:29,193 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:29,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:29,193 INFO L225 Difference]: With dead ends: 255 [2021-06-05 22:01:29,193 INFO L226 Difference]: Without dead ends: 239 [2021-06-05 22:01:29,194 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 448.5ms TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:01:29,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-06-05 22:01:29,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 235. [2021-06-05 22:01:29,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.1923076923076925) internal successors, (513), 234 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:29,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 513 transitions. [2021-06-05 22:01:29,195 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 513 transitions. Word has length 20 [2021-06-05 22:01:29,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:29,195 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 513 transitions. [2021-06-05 22:01:29,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:29,196 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 513 transitions. [2021-06-05 22:01:29,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:29,196 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:29,196 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:29,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3555,716 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:29,396 INFO L430 AbstractCegarLoop]: === Iteration 722 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:29,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:29,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1296154410, now seen corresponding path program 716 times [2021-06-05 22:01:29,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:29,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365849974] [2021-06-05 22:01:29,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:29,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:29,632 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:29,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:29,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365849974] [2021-06-05 22:01:29,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365849974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:29,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192831641] [2021-06-05 22:01:29,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 717 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 717 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:29,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:01:29,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:29,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:01:29,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:29,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:29,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:01:29,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:29,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:29,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:29,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:01:29,852 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:29,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:29,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:01:29,859 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-06-05 22:01:29,916 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:29,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192831641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:29,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:29,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:01:29,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357950352] [2021-06-05 22:01:29,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:01:29,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:29,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:01:29,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:01:29,916 INFO L87 Difference]: Start difference. First operand 235 states and 513 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:30,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:30,449 INFO L93 Difference]: Finished difference Result 258 states and 558 transitions. [2021-06-05 22:01:30,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:01:30,450 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:30,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:30,450 INFO L225 Difference]: With dead ends: 258 [2021-06-05 22:01:30,450 INFO L226 Difference]: Without dead ends: 251 [2021-06-05 22:01:30,450 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 613.0ms TimeCoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:01:30,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-06-05 22:01:30,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 236. [2021-06-05 22:01:30,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.195744680851064) internal successors, (516), 235 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:30,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 516 transitions. [2021-06-05 22:01:30,452 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 516 transitions. Word has length 20 [2021-06-05 22:01:30,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:30,452 INFO L482 AbstractCegarLoop]: Abstraction has 236 states and 516 transitions. [2021-06-05 22:01:30,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:30,452 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 516 transitions. [2021-06-05 22:01:30,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:30,452 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:30,452 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:30,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3556,717 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:30,653 INFO L430 AbstractCegarLoop]: === Iteration 723 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:30,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:30,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1862627614, now seen corresponding path program 717 times [2021-06-05 22:01:30,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:30,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722947106] [2021-06-05 22:01:30,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:30,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:30,876 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:30,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:30,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722947106] [2021-06-05 22:01:30,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722947106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:30,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389222422] [2021-06-05 22:01:30,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 718 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 718 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:30,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:01:30,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:30,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:30,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:31,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:31,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:31,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:31,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:31,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:31,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:31,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:31,072 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:31,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:31,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:31,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:31,076 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:31,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:31,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:31,080 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:31,135 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-06-05 22:01:31,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:31,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:31,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:01:31,139 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:31,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:31,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:01:31,143 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:31,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:31,167 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:01:31,167 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 22:01:31,251 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:31,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389222422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:31,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:31,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:31,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759036310] [2021-06-05 22:01:31,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:31,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:31,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:31,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:31,251 INFO L87 Difference]: Start difference. First operand 236 states and 516 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:31,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:31,937 INFO L93 Difference]: Finished difference Result 292 states and 608 transitions. [2021-06-05 22:01:31,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:01:31,937 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:31,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:31,938 INFO L225 Difference]: With dead ends: 292 [2021-06-05 22:01:31,938 INFO L226 Difference]: Without dead ends: 270 [2021-06-05 22:01:31,938 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 789.3ms TimeCoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:01:31,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-06-05 22:01:31,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 234. [2021-06-05 22:01:31,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.1931330472103006) internal successors, (511), 233 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:31,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 511 transitions. [2021-06-05 22:01:31,940 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 511 transitions. Word has length 20 [2021-06-05 22:01:31,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:31,940 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 511 transitions. [2021-06-05 22:01:31,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:31,940 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 511 transitions. [2021-06-05 22:01:31,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:31,940 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:31,940 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:32,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3557,718 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:32,141 INFO L430 AbstractCegarLoop]: === Iteration 724 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:32,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:32,141 INFO L82 PathProgramCache]: Analyzing trace with hash -810629710, now seen corresponding path program 718 times [2021-06-05 22:01:32,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:32,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474894574] [2021-06-05 22:01:32,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:32,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:32,355 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:32,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:32,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474894574] [2021-06-05 22:01:32,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474894574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:32,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886903648] [2021-06-05 22:01:32,355 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 719 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 719 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:32,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:01:32,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:32,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:32,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:32,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:32,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:32,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:01:32,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:32,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:32,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:01:32,564 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:32,586 INFO L628 ElimStorePlain]: treesize reduction 36, result has 47.8 percent of original size [2021-06-05 22:01:32,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:32,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:01:32,589 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:32,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:32,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:01:32,596 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:01:32,639 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:32,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886903648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:32,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:32,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:32,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376262376] [2021-06-05 22:01:32,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:32,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:32,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:32,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:32,640 INFO L87 Difference]: Start difference. First operand 234 states and 511 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:32,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:32,996 INFO L93 Difference]: Finished difference Result 259 states and 557 transitions. [2021-06-05 22:01:32,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:01:32,997 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:32,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:32,997 INFO L225 Difference]: With dead ends: 259 [2021-06-05 22:01:32,997 INFO L226 Difference]: Without dead ends: 246 [2021-06-05 22:01:32,997 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 518.0ms TimeCoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:01:32,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-06-05 22:01:32,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 236. [2021-06-05 22:01:32,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.1914893617021276) internal successors, (515), 235 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:32,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 515 transitions. [2021-06-05 22:01:32,999 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 515 transitions. Word has length 20 [2021-06-05 22:01:32,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:32,999 INFO L482 AbstractCegarLoop]: Abstraction has 236 states and 515 transitions. [2021-06-05 22:01:32,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:32,999 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 515 transitions. [2021-06-05 22:01:32,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:32,999 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:32,999 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:33,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 719 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3560 [2021-06-05 22:01:33,200 INFO L430 AbstractCegarLoop]: === Iteration 725 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:33,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:33,200 INFO L82 PathProgramCache]: Analyzing trace with hash 325555562, now seen corresponding path program 719 times [2021-06-05 22:01:33,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:33,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730745836] [2021-06-05 22:01:33,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:33,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:33,367 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:33,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:33,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730745836] [2021-06-05 22:01:33,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730745836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:33,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232463571] [2021-06-05 22:01:33,367 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 720 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 720 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:33,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:01:33,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:33,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:33,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:33,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:33,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:33,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:33,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:33,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:33,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:33,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:33,550 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:33,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:33,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:33,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:33,553 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:33,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:33,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:33,557 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:33,612 INFO L628 ElimStorePlain]: treesize reduction 77, result has 45.4 percent of original size [2021-06-05 22:01:33,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:33,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:33,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:01:33,616 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:33,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:33,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:01:33,620 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:33,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:33,645 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:01:33,645 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 22:01:33,719 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:33,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232463571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:33,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:33,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:01:33,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409739804] [2021-06-05 22:01:33,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:01:33,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:33,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:01:33,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:01:33,720 INFO L87 Difference]: Start difference. First operand 236 states and 515 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:34,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:34,047 INFO L93 Difference]: Finished difference Result 260 states and 553 transitions. [2021-06-05 22:01:34,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:01:34,047 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:34,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:34,047 INFO L225 Difference]: With dead ends: 260 [2021-06-05 22:01:34,047 INFO L226 Difference]: Without dead ends: 245 [2021-06-05 22:01:34,047 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 494.1ms TimeCoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:01:34,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-06-05 22:01:34,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 232. [2021-06-05 22:01:34,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.1948051948051948) internal successors, (507), 231 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:34,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 507 transitions. [2021-06-05 22:01:34,049 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 507 transitions. Word has length 20 [2021-06-05 22:01:34,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:34,049 INFO L482 AbstractCegarLoop]: Abstraction has 232 states and 507 transitions. [2021-06-05 22:01:34,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:34,049 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 507 transitions. [2021-06-05 22:01:34,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:34,050 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:34,050 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:34,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3561,720 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:34,250 INFO L430 AbstractCegarLoop]: === Iteration 726 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:34,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:34,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1820615198, now seen corresponding path program 720 times [2021-06-05 22:01:34,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:34,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810827588] [2021-06-05 22:01:34,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:34,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:34,472 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:34,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:34,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810827588] [2021-06-05 22:01:34,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810827588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:34,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047866459] [2021-06-05 22:01:34,472 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 721 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 721 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:34,502 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:01:34,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:34,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:34,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:34,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:34,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:34,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:34,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:34,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:34,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:34,672 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:34,734 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-06-05 22:01:34,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:34,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:01:34,738 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:34,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:34,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:34,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:34,766 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:34,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:34,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:34,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:01:34,791 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:34,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:34,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:01:34,825 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:01:34,917 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:34,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047866459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:34,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:34,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:34,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641326311] [2021-06-05 22:01:34,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:34,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:34,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:34,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:34,918 INFO L87 Difference]: Start difference. First operand 232 states and 507 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:35,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:35,414 INFO L93 Difference]: Finished difference Result 301 states and 634 transitions. [2021-06-05 22:01:35,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:01:35,415 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:35,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:35,415 INFO L225 Difference]: With dead ends: 301 [2021-06-05 22:01:35,415 INFO L226 Difference]: Without dead ends: 282 [2021-06-05 22:01:35,415 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 588.1ms TimeCoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:01:35,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-06-05 22:01:35,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 232. [2021-06-05 22:01:35,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.1948051948051948) internal successors, (507), 231 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:35,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 507 transitions. [2021-06-05 22:01:35,417 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 507 transitions. Word has length 20 [2021-06-05 22:01:35,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:35,417 INFO L482 AbstractCegarLoop]: Abstraction has 232 states and 507 transitions. [2021-06-05 22:01:35,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:35,417 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 507 transitions. [2021-06-05 22:01:35,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:35,417 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:35,418 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:35,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3564,721 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:35,618 INFO L430 AbstractCegarLoop]: === Iteration 727 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:35,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:35,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1255793558, now seen corresponding path program 721 times [2021-06-05 22:01:35,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:35,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389344881] [2021-06-05 22:01:35,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:35,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:35,761 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:35,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:35,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389344881] [2021-06-05 22:01:35,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389344881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:35,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720021643] [2021-06-05 22:01:35,762 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 722 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 722 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:35,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:35,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:35,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:35,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:35,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:35,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:01:35,963 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:35,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:35,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:01:35,966 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:35,987 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-06-05 22:01:35,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:35,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:01:35,990 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:35,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:35,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:01:35,998 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:01:36,033 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:36,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720021643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:36,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:36,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:01:36,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518590927] [2021-06-05 22:01:36,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:01:36,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:36,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:01:36,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:01:36,034 INFO L87 Difference]: Start difference. First operand 232 states and 507 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:36,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:36,419 INFO L93 Difference]: Finished difference Result 259 states and 556 transitions. [2021-06-05 22:01:36,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:01:36,419 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:36,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:36,420 INFO L225 Difference]: With dead ends: 259 [2021-06-05 22:01:36,420 INFO L226 Difference]: Without dead ends: 243 [2021-06-05 22:01:36,420 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 483.5ms TimeCoverageRelationStatistics Valid=118, Invalid=874, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:01:36,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-06-05 22:01:36,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 235. [2021-06-05 22:01:36,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.1923076923076925) internal successors, (513), 234 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:36,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 513 transitions. [2021-06-05 22:01:36,422 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 513 transitions. Word has length 20 [2021-06-05 22:01:36,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:36,422 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 513 transitions. [2021-06-05 22:01:36,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:36,422 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 513 transitions. [2021-06-05 22:01:36,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:36,422 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:36,422 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:36,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3569,722 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:36,622 INFO L430 AbstractCegarLoop]: === Iteration 728 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:36,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:36,623 INFO L82 PathProgramCache]: Analyzing trace with hash -393788494, now seen corresponding path program 722 times [2021-06-05 22:01:36,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:36,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903396790] [2021-06-05 22:01:36,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:36,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:36,794 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:36,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:36,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903396790] [2021-06-05 22:01:36,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903396790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:36,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440277471] [2021-06-05 22:01:36,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 723 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 723 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:36,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:01:36,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:36,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:01:36,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:37,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:37,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:01:37,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:37,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:37,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:37,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:01:37,030 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:37,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:37,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:01:37,036 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-06-05 22:01:37,054 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:37,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440277471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:37,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:37,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 22:01:37,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372048225] [2021-06-05 22:01:37,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:01:37,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:37,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:01:37,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:01:37,055 INFO L87 Difference]: Start difference. First operand 235 states and 513 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:37,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:37,453 INFO L93 Difference]: Finished difference Result 252 states and 542 transitions. [2021-06-05 22:01:37,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:01:37,453 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:37,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:37,453 INFO L225 Difference]: With dead ends: 252 [2021-06-05 22:01:37,453 INFO L226 Difference]: Without dead ends: 245 [2021-06-05 22:01:37,454 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 545.1ms TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:01:37,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-06-05 22:01:37,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 236. [2021-06-05 22:01:37,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.195744680851064) internal successors, (516), 235 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:37,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 516 transitions. [2021-06-05 22:01:37,455 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 516 transitions. Word has length 20 [2021-06-05 22:01:37,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:37,456 INFO L482 AbstractCegarLoop]: Abstraction has 236 states and 516 transitions. [2021-06-05 22:01:37,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:37,456 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 516 transitions. [2021-06-05 22:01:37,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:37,456 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:37,456 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:37,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 723 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3570 [2021-06-05 22:01:37,656 INFO L430 AbstractCegarLoop]: === Iteration 729 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:37,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:37,657 INFO L82 PathProgramCache]: Analyzing trace with hash 742396778, now seen corresponding path program 723 times [2021-06-05 22:01:37,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:37,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663628236] [2021-06-05 22:01:37,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:37,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:37,886 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:37,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:37,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663628236] [2021-06-05 22:01:37,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663628236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:37,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434459181] [2021-06-05 22:01:37,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 724 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 724 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:37,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:01:37,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:37,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:37,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:38,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:38,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:38,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:38,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:38,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:38,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:38,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:38,072 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:38,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:38,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:38,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:38,076 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:38,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:38,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:38,079 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:38,136 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-06-05 22:01:38,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:38,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:38,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:01:38,140 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:38,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:38,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:01:38,144 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:38,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:38,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:01:38,168 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 22:01:38,251 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:38,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434459181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:38,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:38,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:38,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174571255] [2021-06-05 22:01:38,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:38,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:38,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:38,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:38,252 INFO L87 Difference]: Start difference. First operand 236 states and 516 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:38,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:38,896 INFO L93 Difference]: Finished difference Result 281 states and 588 transitions. [2021-06-05 22:01:38,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:01:38,896 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:38,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:38,896 INFO L225 Difference]: With dead ends: 281 [2021-06-05 22:01:38,897 INFO L226 Difference]: Without dead ends: 262 [2021-06-05 22:01:38,897 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 765.6ms TimeCoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:01:38,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-05 22:01:38,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 234. [2021-06-05 22:01:38,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.1931330472103006) internal successors, (511), 233 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:38,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 511 transitions. [2021-06-05 22:01:38,899 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 511 transitions. Word has length 20 [2021-06-05 22:01:38,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:38,899 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 511 transitions. [2021-06-05 22:01:38,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:38,899 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 511 transitions. [2021-06-05 22:01:38,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:38,899 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:38,899 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:39,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 724 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3571 [2021-06-05 22:01:39,100 INFO L430 AbstractCegarLoop]: === Iteration 730 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:39,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:39,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1794394682, now seen corresponding path program 724 times [2021-06-05 22:01:39,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:39,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023180116] [2021-06-05 22:01:39,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:39,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:39,299 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:39,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:39,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023180116] [2021-06-05 22:01:39,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023180116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:39,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012213360] [2021-06-05 22:01:39,299 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 725 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 725 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:39,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:01:39,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:39,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:39,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:39,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:39,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:39,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:01:39,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:39,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:39,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:01:39,488 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:39,511 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-06-05 22:01:39,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:39,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:01:39,515 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:39,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:39,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:01:39,523 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:01:39,562 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:39,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012213360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:39,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:39,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:39,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570609363] [2021-06-05 22:01:39,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:39,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:39,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:39,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:39,563 INFO L87 Difference]: Start difference. First operand 234 states and 511 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:39,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:39,912 INFO L93 Difference]: Finished difference Result 255 states and 548 transitions. [2021-06-05 22:01:39,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:01:39,912 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:39,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:39,913 INFO L225 Difference]: With dead ends: 255 [2021-06-05 22:01:39,913 INFO L226 Difference]: Without dead ends: 242 [2021-06-05 22:01:39,913 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 502.7ms TimeCoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:01:39,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-06-05 22:01:39,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 236. [2021-06-05 22:01:39,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.1914893617021276) internal successors, (515), 235 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:39,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 515 transitions. [2021-06-05 22:01:39,914 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 515 transitions. Word has length 20 [2021-06-05 22:01:39,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:39,915 INFO L482 AbstractCegarLoop]: Abstraction has 236 states and 515 transitions. [2021-06-05 22:01:39,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:39,915 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 515 transitions. [2021-06-05 22:01:39,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:39,915 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:39,915 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:40,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3574,725 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:40,115 INFO L430 AbstractCegarLoop]: === Iteration 731 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:40,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:40,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1364387342, now seen corresponding path program 725 times [2021-06-05 22:01:40,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:40,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57061470] [2021-06-05 22:01:40,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:40,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:40,288 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:40,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:40,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57061470] [2021-06-05 22:01:40,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57061470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:40,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132043054] [2021-06-05 22:01:40,289 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 726 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 726 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:40,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:01:40,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:40,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:40,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:40,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:40,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:40,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:40,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:40,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:40,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:40,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:40,451 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:40,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:40,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:40,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:40,455 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:40,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:40,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:40,458 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:40,512 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-06-05 22:01:40,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:40,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:40,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:01:40,516 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:40,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:40,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:01:40,520 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:40,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:40,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:01:40,543 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 22:01:40,621 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:40,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132043054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:40,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:40,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:01:40,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729027279] [2021-06-05 22:01:40,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:01:40,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:40,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:01:40,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:01:40,622 INFO L87 Difference]: Start difference. First operand 236 states and 515 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:41,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:41,040 INFO L93 Difference]: Finished difference Result 252 states and 540 transitions. [2021-06-05 22:01:41,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:01:41,040 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:41,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:41,040 INFO L225 Difference]: With dead ends: 252 [2021-06-05 22:01:41,040 INFO L226 Difference]: Without dead ends: 240 [2021-06-05 22:01:41,041 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 531.4ms TimeCoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:01:41,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-06-05 22:01:41,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 235. [2021-06-05 22:01:41,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.1923076923076925) internal successors, (513), 234 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:41,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 513 transitions. [2021-06-05 22:01:41,042 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 513 transitions. Word has length 20 [2021-06-05 22:01:41,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:41,042 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 513 transitions. [2021-06-05 22:01:41,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:41,042 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 513 transitions. [2021-06-05 22:01:41,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:41,045 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:41,045 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:41,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3575,726 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:41,246 INFO L430 AbstractCegarLoop]: === Iteration 732 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:41,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:41,246 INFO L82 PathProgramCache]: Analyzing trace with hash 784409194, now seen corresponding path program 726 times [2021-06-05 22:01:41,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:41,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992659392] [2021-06-05 22:01:41,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:41,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:41,468 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:41,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:41,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992659392] [2021-06-05 22:01:41,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992659392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:41,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978798146] [2021-06-05 22:01:41,469 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 727 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 727 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:41,495 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:01:41,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:41,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:01:41,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:41,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:41,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:41,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:41,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:41,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:41,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:41,630 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:41,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:41,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:41,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:41,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:01:41,655 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:41,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:41,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:01:41,659 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:41,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:41,680 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:01:41,680 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 22:01:41,763 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:41,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978798146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:41,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:41,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:41,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113558590] [2021-06-05 22:01:41,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:41,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:41,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:41,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:41,764 INFO L87 Difference]: Start difference. First operand 235 states and 513 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:42,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:42,174 INFO L93 Difference]: Finished difference Result 267 states and 578 transitions. [2021-06-05 22:01:42,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:01:42,175 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:42,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:42,175 INFO L225 Difference]: With dead ends: 267 [2021-06-05 22:01:42,175 INFO L226 Difference]: Without dead ends: 258 [2021-06-05 22:01:42,175 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 561.0ms TimeCoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:01:42,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-06-05 22:01:42,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 235. [2021-06-05 22:01:42,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.1923076923076925) internal successors, (513), 234 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:42,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 513 transitions. [2021-06-05 22:01:42,177 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 513 transitions. Word has length 20 [2021-06-05 22:01:42,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:42,177 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 513 transitions. [2021-06-05 22:01:42,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:42,177 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 513 transitions. [2021-06-05 22:01:42,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:42,177 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:42,177 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:42,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3578,727 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:42,378 INFO L430 AbstractCegarLoop]: === Iteration 733 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:42,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:42,378 INFO L82 PathProgramCache]: Analyzing trace with hash 908596402, now seen corresponding path program 727 times [2021-06-05 22:01:42,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:42,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217168498] [2021-06-05 22:01:42,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:42,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:42,588 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:42,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:42,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217168498] [2021-06-05 22:01:42,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217168498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:42,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722090750] [2021-06-05 22:01:42,588 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 728 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 728 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:42,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:42,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:42,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:42,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:42,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:42,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:01:42,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:42,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:42,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:01:42,807 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:42,830 INFO L628 ElimStorePlain]: treesize reduction 36, result has 47.8 percent of original size [2021-06-05 22:01:42,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:42,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:01:42,833 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:42,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:42,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:01:42,841 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:01:42,877 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:42,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722090750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:42,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:42,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:01:42,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011486868] [2021-06-05 22:01:42,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:01:42,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:42,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:01:42,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:01:42,878 INFO L87 Difference]: Start difference. First operand 235 states and 513 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:43,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:43,203 INFO L93 Difference]: Finished difference Result 263 states and 564 transitions. [2021-06-05 22:01:43,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:01:43,204 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:43,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:43,204 INFO L225 Difference]: With dead ends: 263 [2021-06-05 22:01:43,204 INFO L226 Difference]: Without dead ends: 250 [2021-06-05 22:01:43,204 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 481.2ms TimeCoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:01:43,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-06-05 22:01:43,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 238. [2021-06-05 22:01:43,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.189873417721519) internal successors, (519), 237 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:43,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 519 transitions. [2021-06-05 22:01:43,206 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 519 transitions. Word has length 20 [2021-06-05 22:01:43,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:43,206 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 519 transitions. [2021-06-05 22:01:43,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:43,206 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 519 transitions. [2021-06-05 22:01:43,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:43,206 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:43,206 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:43,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 728 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3581 [2021-06-05 22:01:43,407 INFO L430 AbstractCegarLoop]: === Iteration 734 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:43,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:43,407 INFO L82 PathProgramCache]: Analyzing trace with hash 2044781674, now seen corresponding path program 728 times [2021-06-05 22:01:43,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:43,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068381931] [2021-06-05 22:01:43,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:43,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:43,640 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:43,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:43,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068381931] [2021-06-05 22:01:43,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068381931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:43,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269439887] [2021-06-05 22:01:43,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 729 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 729 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:43,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:01:43,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:43,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:01:43,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:43,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:43,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:43,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:43,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:43,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:43,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:43,823 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:43,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:43,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:43,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:43,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:01:43,852 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:43,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:43,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:01:43,856 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:43,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:43,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:01:43,879 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 22:01:43,957 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:43,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269439887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:43,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:43,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:43,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973244090] [2021-06-05 22:01:43,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:43,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:43,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:43,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:43,958 INFO L87 Difference]: Start difference. First operand 238 states and 519 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:44,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:44,550 INFO L93 Difference]: Finished difference Result 284 states and 598 transitions. [2021-06-05 22:01:44,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:01:44,550 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:44,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:44,551 INFO L225 Difference]: With dead ends: 284 [2021-06-05 22:01:44,551 INFO L226 Difference]: Without dead ends: 268 [2021-06-05 22:01:44,551 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 788.5ms TimeCoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:01:44,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-06-05 22:01:44,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 237. [2021-06-05 22:01:44,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.190677966101695) internal successors, (517), 236 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:44,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 517 transitions. [2021-06-05 22:01:44,553 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 517 transitions. Word has length 20 [2021-06-05 22:01:44,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:44,553 INFO L482 AbstractCegarLoop]: Abstraction has 237 states and 517 transitions. [2021-06-05 22:01:44,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:44,553 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 517 transitions. [2021-06-05 22:01:44,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:44,553 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:44,553 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:44,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 729 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3582 [2021-06-05 22:01:44,754 INFO L430 AbstractCegarLoop]: === Iteration 735 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:44,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:44,754 INFO L82 PathProgramCache]: Analyzing trace with hash -101389086, now seen corresponding path program 729 times [2021-06-05 22:01:44,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:44,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082439037] [2021-06-05 22:01:44,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:44,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:44,971 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:44,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:44,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082439037] [2021-06-05 22:01:44,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082439037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:44,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900803032] [2021-06-05 22:01:44,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 730 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 730 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:44,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:01:44,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:44,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:01:45,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:45,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:45,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:45,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:45,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:45,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:45,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:45,159 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:45,211 INFO L628 ElimStorePlain]: treesize reduction 78, result has 44.3 percent of original size [2021-06-05 22:01:45,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:45,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:01:45,215 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:45,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:45,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:45,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:45,238 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:45,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:45,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:45,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:01:45,261 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:45,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:45,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:01:45,280 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:153, output treesize:32 [2021-06-05 22:01:45,358 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:45,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900803032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:45,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:45,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:45,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470613730] [2021-06-05 22:01:45,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:45,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:45,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:45,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:45,359 INFO L87 Difference]: Start difference. First operand 237 states and 517 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:46,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:46,223 INFO L93 Difference]: Finished difference Result 312 states and 648 transitions. [2021-06-05 22:01:46,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:01:46,223 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:46,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:46,223 INFO L225 Difference]: With dead ends: 312 [2021-06-05 22:01:46,223 INFO L226 Difference]: Without dead ends: 286 [2021-06-05 22:01:46,224 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 936.3ms TimeCoverageRelationStatistics Valid=144, Invalid=1116, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:01:46,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-06-05 22:01:46,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 237. [2021-06-05 22:01:46,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.190677966101695) internal successors, (517), 236 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:46,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 517 transitions. [2021-06-05 22:01:46,226 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 517 transitions. Word has length 20 [2021-06-05 22:01:46,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:46,226 INFO L482 AbstractCegarLoop]: Abstraction has 237 states and 517 transitions. [2021-06-05 22:01:46,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:46,226 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 517 transitions. [2021-06-05 22:01:46,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:46,226 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:46,226 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:46,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3585,730 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:46,433 INFO L430 AbstractCegarLoop]: === Iteration 736 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:46,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:46,433 INFO L82 PathProgramCache]: Analyzing trace with hash 2086794090, now seen corresponding path program 730 times [2021-06-05 22:01:46,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:46,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164431648] [2021-06-05 22:01:46,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:46,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:46,646 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:46,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:46,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164431648] [2021-06-05 22:01:46,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164431648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:46,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314352956] [2021-06-05 22:01:46,646 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 731 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 731 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:46,671 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:01:46,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:46,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:46,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:46,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:46,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:46,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:46,869 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:46,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:46,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:46,872 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:46,937 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-06-05 22:01:46,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:46,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:01:46,941 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:46,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:46,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:46,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:46,972 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:46,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:46,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:46,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:01:46,998 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:47,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:47,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:01:47,020 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:01:47,105 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:47,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314352956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:47,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:47,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:47,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454846927] [2021-06-05 22:01:47,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:47,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:47,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:47,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:47,106 INFO L87 Difference]: Start difference. First operand 237 states and 517 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:47,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:47,657 INFO L93 Difference]: Finished difference Result 297 states and 626 transitions. [2021-06-05 22:01:47,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:01:47,657 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:47,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:47,657 INFO L225 Difference]: With dead ends: 297 [2021-06-05 22:01:47,657 INFO L226 Difference]: Without dead ends: 278 [2021-06-05 22:01:47,657 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 614.9ms TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:01:47,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-06-05 22:01:47,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 237. [2021-06-05 22:01:47,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.190677966101695) internal successors, (517), 236 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:47,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 517 transitions. [2021-06-05 22:01:47,659 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 517 transitions. Word has length 20 [2021-06-05 22:01:47,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:47,659 INFO L482 AbstractCegarLoop]: Abstraction has 237 states and 517 transitions. [2021-06-05 22:01:47,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:47,659 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 517 transitions. [2021-06-05 22:01:47,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:47,660 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:47,660 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:47,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 731 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3590 [2021-06-05 22:01:47,860 INFO L430 AbstractCegarLoop]: === Iteration 737 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:47,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:47,860 INFO L82 PathProgramCache]: Analyzing trace with hash -2104416030, now seen corresponding path program 731 times [2021-06-05 22:01:47,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:47,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103017166] [2021-06-05 22:01:47,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:47,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:48,071 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:48,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:48,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103017166] [2021-06-05 22:01:48,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103017166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:48,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853670120] [2021-06-05 22:01:48,071 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 732 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 732 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:48,098 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:01:48,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:48,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:48,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:48,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:48,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:48,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:01:48,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:48,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:48,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:01:48,313 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:48,340 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-06-05 22:01:48,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:48,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:01:48,344 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:48,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:48,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:01:48,353 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:01:48,401 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:48,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853670120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:48,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:48,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:48,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620644564] [2021-06-05 22:01:48,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:48,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:48,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:48,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:48,402 INFO L87 Difference]: Start difference. First operand 237 states and 517 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:48,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:48,715 INFO L93 Difference]: Finished difference Result 264 states and 562 transitions. [2021-06-05 22:01:48,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:01:48,716 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:48,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:48,716 INFO L225 Difference]: With dead ends: 264 [2021-06-05 22:01:48,716 INFO L226 Difference]: Without dead ends: 248 [2021-06-05 22:01:48,716 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 467.3ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:01:48,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-06-05 22:01:48,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 241. [2021-06-05 22:01:48,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.1875) internal successors, (525), 240 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:48,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 525 transitions. [2021-06-05 22:01:48,718 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 525 transitions. Word has length 20 [2021-06-05 22:01:48,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:48,718 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 525 transitions. [2021-06-05 22:01:48,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:48,718 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 525 transitions. [2021-06-05 22:01:48,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:48,718 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:48,718 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:48,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 732 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3595 [2021-06-05 22:01:48,919 INFO L430 AbstractCegarLoop]: === Iteration 738 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:48,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:48,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1242410966, now seen corresponding path program 732 times [2021-06-05 22:01:48,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:48,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669169475] [2021-06-05 22:01:48,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:48,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:49,107 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:49,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:49,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669169475] [2021-06-05 22:01:49,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669169475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:49,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328634974] [2021-06-05 22:01:49,107 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 733 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 733 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:49,133 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:01:49,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:49,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:49,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:49,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:49,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:49,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:01:49,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:49,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:49,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:01:49,318 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:49,341 INFO L628 ElimStorePlain]: treesize reduction 36, result has 47.8 percent of original size [2021-06-05 22:01:49,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:49,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:01:49,343 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:49,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:49,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:01:49,351 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:01:49,394 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:49,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328634974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:49,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:49,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:49,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851283120] [2021-06-05 22:01:49,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:49,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:49,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:49,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:49,394 INFO L87 Difference]: Start difference. First operand 241 states and 525 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:49,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:49,871 INFO L93 Difference]: Finished difference Result 266 states and 570 transitions. [2021-06-05 22:01:49,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:01:49,872 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:49,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:49,872 INFO L225 Difference]: With dead ends: 266 [2021-06-05 22:01:49,872 INFO L226 Difference]: Without dead ends: 253 [2021-06-05 22:01:49,872 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 536.1ms TimeCoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:01:49,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-06-05 22:01:49,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 242. [2021-06-05 22:01:49,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.1867219917012446) internal successors, (527), 241 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:49,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 527 transitions. [2021-06-05 22:01:49,874 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 527 transitions. Word has length 20 [2021-06-05 22:01:49,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:49,874 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 527 transitions. [2021-06-05 22:01:49,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:49,874 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 527 transitions. [2021-06-05 22:01:49,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:49,874 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:49,874 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:50,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3596,733 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:50,075 INFO L430 AbstractCegarLoop]: === Iteration 739 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:50,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:50,075 INFO L82 PathProgramCache]: Analyzing trace with hash -106225694, now seen corresponding path program 733 times [2021-06-05 22:01:50,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:50,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298555345] [2021-06-05 22:01:50,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:50,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:50,226 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:50,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:50,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298555345] [2021-06-05 22:01:50,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298555345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:50,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452605414] [2021-06-05 22:01:50,226 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 734 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 734 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:50,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:50,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:50,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:50,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:50,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:50,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:50,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:50,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:50,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:50,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:50,410 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:50,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:50,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:50,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:50,414 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:50,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:50,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:50,418 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:50,474 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-06-05 22:01:50,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:50,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:50,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:01:50,479 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:50,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:50,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:01:50,482 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:50,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:50,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:01:50,506 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 22:01:50,592 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:50,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452605414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:50,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:50,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:01:50,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47808784] [2021-06-05 22:01:50,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:01:50,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:50,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:01:50,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:01:50,592 INFO L87 Difference]: Start difference. First operand 242 states and 527 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:50,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:50,956 INFO L93 Difference]: Finished difference Result 287 states and 601 transitions. [2021-06-05 22:01:50,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:01:50,956 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:50,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:50,957 INFO L225 Difference]: With dead ends: 287 [2021-06-05 22:01:50,957 INFO L226 Difference]: Without dead ends: 268 [2021-06-05 22:01:50,957 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 491.5ms TimeCoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:01:50,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-06-05 22:01:50,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 240. [2021-06-05 22:01:50,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.188284518828452) internal successors, (523), 239 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:50,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 523 transitions. [2021-06-05 22:01:50,959 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 523 transitions. Word has length 20 [2021-06-05 22:01:50,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:50,959 INFO L482 AbstractCegarLoop]: Abstraction has 240 states and 523 transitions. [2021-06-05 22:01:50,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:50,959 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 523 transitions. [2021-06-05 22:01:50,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:50,959 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:50,959 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:51,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3597,734 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:51,160 INFO L430 AbstractCegarLoop]: === Iteration 740 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:51,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:51,160 INFO L82 PathProgramCache]: Analyzing trace with hash 945772210, now seen corresponding path program 734 times [2021-06-05 22:01:51,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:51,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408175208] [2021-06-05 22:01:51,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:51,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:51,318 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:51,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:51,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408175208] [2021-06-05 22:01:51,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408175208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:51,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937386403] [2021-06-05 22:01:51,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 735 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 735 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:51,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:01:51,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:51,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:01:51,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:51,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:51,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:01:51,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:51,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:51,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:51,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:01:51,513 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:51,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:51,519 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:01:51,519 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-06-05 22:01:51,585 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:51,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937386403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:51,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:51,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:51,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17301096] [2021-06-05 22:01:51,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:51,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:51,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:51,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:51,585 INFO L87 Difference]: Start difference. First operand 240 states and 523 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:51,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:51,948 INFO L93 Difference]: Finished difference Result 266 states and 573 transitions. [2021-06-05 22:01:51,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:01:51,948 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:51,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:51,949 INFO L225 Difference]: With dead ends: 266 [2021-06-05 22:01:51,949 INFO L226 Difference]: Without dead ends: 259 [2021-06-05 22:01:51,949 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 518.6ms TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:01:51,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-06-05 22:01:51,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 242. [2021-06-05 22:01:51,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.190871369294606) internal successors, (528), 241 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:51,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 528 transitions. [2021-06-05 22:01:51,951 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 528 transitions. Word has length 20 [2021-06-05 22:01:51,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:51,951 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 528 transitions. [2021-06-05 22:01:51,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:51,951 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 528 transitions. [2021-06-05 22:01:51,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:51,951 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:51,951 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:52,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3600,735 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:52,152 INFO L430 AbstractCegarLoop]: === Iteration 741 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:52,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:52,152 INFO L82 PathProgramCache]: Analyzing trace with hash 2081957482, now seen corresponding path program 735 times [2021-06-05 22:01:52,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:52,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087848632] [2021-06-05 22:01:52,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:52,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:52,364 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:52,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:52,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087848632] [2021-06-05 22:01:52,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087848632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:52,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168914112] [2021-06-05 22:01:52,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 736 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 736 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:52,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:01:52,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:52,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:52,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:52,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:52,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:52,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:52,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:52,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:52,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:52,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:52,535 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:52,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:52,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:52,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:52,539 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:52,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:52,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:52,542 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:52,596 INFO L628 ElimStorePlain]: treesize reduction 77, result has 46.5 percent of original size [2021-06-05 22:01:52,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:52,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:52,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:01:52,601 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:52,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:52,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:01:52,604 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:52,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:52,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:01:52,629 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 22:01:52,705 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:52,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168914112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:52,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:52,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:01:52,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910072109] [2021-06-05 22:01:52,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:01:52,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:52,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:01:52,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:01:52,706 INFO L87 Difference]: Start difference. First operand 242 states and 528 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:53,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:53,198 INFO L93 Difference]: Finished difference Result 292 states and 610 transitions. [2021-06-05 22:01:53,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:01:53,199 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:53,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:53,199 INFO L225 Difference]: With dead ends: 292 [2021-06-05 22:01:53,199 INFO L226 Difference]: Without dead ends: 273 [2021-06-05 22:01:53,199 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 664.2ms TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:01:53,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-06-05 22:01:53,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 241. [2021-06-05 22:01:53,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.1875) internal successors, (525), 240 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:53,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 525 transitions. [2021-06-05 22:01:53,201 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 525 transitions. Word has length 20 [2021-06-05 22:01:53,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:53,201 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 525 transitions. [2021-06-05 22:01:53,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:53,201 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 525 transitions. [2021-06-05 22:01:53,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:53,202 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:53,202 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:53,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3601,736 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:53,402 INFO L430 AbstractCegarLoop]: === Iteration 742 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:53,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:53,402 INFO L82 PathProgramCache]: Analyzing trace with hash -64213278, now seen corresponding path program 736 times [2021-06-05 22:01:53,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:53,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009907906] [2021-06-05 22:01:53,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:53,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:53,605 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:53,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:53,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009907906] [2021-06-05 22:01:53,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009907906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:53,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322025298] [2021-06-05 22:01:53,605 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 737 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 737 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:53,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:01:53,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:53,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:53,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:53,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:53,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:53,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:53,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:53,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:53,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:53,792 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:53,853 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-06-05 22:01:53,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:53,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:01:53,857 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:53,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:53,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:53,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:53,885 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:53,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:53,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:53,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:01:53,911 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:53,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:53,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:01:53,934 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:01:54,016 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:54,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322025298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:54,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:54,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:54,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913990430] [2021-06-05 22:01:54,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:54,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:54,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:54,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:54,017 INFO L87 Difference]: Start difference. First operand 241 states and 525 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:54,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:54,607 INFO L93 Difference]: Finished difference Result 297 states and 626 transitions. [2021-06-05 22:01:54,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:01:54,608 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:54,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:54,608 INFO L225 Difference]: With dead ends: 297 [2021-06-05 22:01:54,608 INFO L226 Difference]: Without dead ends: 278 [2021-06-05 22:01:54,608 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 685.9ms TimeCoverageRelationStatistics Valid=131, Invalid=925, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:01:54,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-06-05 22:01:54,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 240. [2021-06-05 22:01:54,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.188284518828452) internal successors, (523), 239 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:54,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 523 transitions. [2021-06-05 22:01:54,610 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 523 transitions. Word has length 20 [2021-06-05 22:01:54,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:54,610 INFO L482 AbstractCegarLoop]: Abstraction has 240 states and 523 transitions. [2021-06-05 22:01:54,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:54,610 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 523 transitions. [2021-06-05 22:01:54,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:54,610 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:54,611 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:54,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3604,737 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:54,811 INFO L430 AbstractCegarLoop]: === Iteration 743 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:54,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:54,811 INFO L82 PathProgramCache]: Analyzing trace with hash 59973930, now seen corresponding path program 737 times [2021-06-05 22:01:54,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:54,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635325813] [2021-06-05 22:01:54,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:54,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:54,976 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:54,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:54,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635325813] [2021-06-05 22:01:54,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635325813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:54,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788516130] [2021-06-05 22:01:54,977 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 738 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 738 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:55,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:01:55,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:55,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:55,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:55,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:55,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:55,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:01:55,174 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:55,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:55,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:01:55,177 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:55,200 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-06-05 22:01:55,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:55,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:01:55,204 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:55,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:55,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:01:55,211 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:01:55,252 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:55,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788516130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:55,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:55,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:55,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508696205] [2021-06-05 22:01:55,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:55,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:55,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:55,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:55,253 INFO L87 Difference]: Start difference. First operand 240 states and 523 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:55,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:55,519 INFO L93 Difference]: Finished difference Result 268 states and 574 transitions. [2021-06-05 22:01:55,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:01:55,519 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:55,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:55,519 INFO L225 Difference]: With dead ends: 268 [2021-06-05 22:01:55,520 INFO L226 Difference]: Without dead ends: 255 [2021-06-05 22:01:55,520 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 410.8ms TimeCoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:01:55,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-06-05 22:01:55,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 243. [2021-06-05 22:01:55,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.1859504132231407) internal successors, (529), 242 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:55,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 529 transitions. [2021-06-05 22:01:55,521 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 529 transitions. Word has length 20 [2021-06-05 22:01:55,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:55,522 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 529 transitions. [2021-06-05 22:01:55,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:55,522 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 529 transitions. [2021-06-05 22:01:55,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:55,522 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:55,522 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:55,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 738 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3609 [2021-06-05 22:01:55,722 INFO L430 AbstractCegarLoop]: === Iteration 744 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:55,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:55,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1196159202, now seen corresponding path program 738 times [2021-06-05 22:01:55,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:55,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097965883] [2021-06-05 22:01:55,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:55,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:55,941 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:55,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:55,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097965883] [2021-06-05 22:01:55,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097965883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:55,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453058879] [2021-06-05 22:01:55,942 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 739 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 739 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:55,967 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:01:55,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:55,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:55,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:56,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:56,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:56,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:56,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:56,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:56,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:56,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:56,111 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:56,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:56,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:56,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:56,115 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:56,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:56,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:56,118 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:56,174 INFO L628 ElimStorePlain]: treesize reduction 77, result has 47.6 percent of original size [2021-06-05 22:01:56,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:56,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:56,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:01:56,179 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:56,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:56,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:01:56,182 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:56,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:56,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:01:56,207 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 22:01:56,297 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:56,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453058879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:56,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:56,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:56,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028712122] [2021-06-05 22:01:56,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:56,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:56,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:56,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:56,298 INFO L87 Difference]: Start difference. First operand 243 states and 529 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:56,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:56,761 INFO L93 Difference]: Finished difference Result 290 states and 607 transitions. [2021-06-05 22:01:56,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:01:56,761 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:56,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:56,762 INFO L225 Difference]: With dead ends: 290 [2021-06-05 22:01:56,762 INFO L226 Difference]: Without dead ends: 271 [2021-06-05 22:01:56,762 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 602.6ms TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:01:56,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-06-05 22:01:56,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 242. [2021-06-05 22:01:56,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.1867219917012446) internal successors, (527), 241 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:56,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 527 transitions. [2021-06-05 22:01:56,764 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 527 transitions. Word has length 20 [2021-06-05 22:01:56,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:56,764 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 527 transitions. [2021-06-05 22:01:56,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:56,764 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 527 transitions. [2021-06-05 22:01:56,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:56,764 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:56,764 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:56,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3610,739 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:56,964 INFO L430 AbstractCegarLoop]: === Iteration 745 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:56,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:56,965 INFO L82 PathProgramCache]: Analyzing trace with hash -950011558, now seen corresponding path program 739 times [2021-06-05 22:01:56,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:56,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56960608] [2021-06-05 22:01:56,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:56,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:57,170 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:57,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:57,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56960608] [2021-06-05 22:01:57,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56960608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:57,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324745138] [2021-06-05 22:01:57,170 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 740 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 740 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:57,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:57,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:01:57,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:57,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:57,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:57,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:57,356 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:57,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:57,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:57,360 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:57,422 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-06-05 22:01:57,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:57,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:57,425 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:57,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:57,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:57,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:01:57,451 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:57,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:57,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:57,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:01:57,476 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:57,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:57,498 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:01:57,498 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:01:57,579 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:57,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324745138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:57,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:57,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:57,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704911829] [2021-06-05 22:01:57,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:57,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:57,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:57,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:57,580 INFO L87 Difference]: Start difference. First operand 242 states and 527 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:58,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:58,269 INFO L93 Difference]: Finished difference Result 296 states and 624 transitions. [2021-06-05 22:01:58,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:01:58,269 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:58,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:58,269 INFO L225 Difference]: With dead ends: 296 [2021-06-05 22:01:58,269 INFO L226 Difference]: Without dead ends: 277 [2021-06-05 22:01:58,269 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 844.4ms TimeCoverageRelationStatistics Valid=161, Invalid=1171, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:01:58,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-06-05 22:01:58,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 241. [2021-06-05 22:01:58,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.1875) internal successors, (525), 240 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:58,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 525 transitions. [2021-06-05 22:01:58,271 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 525 transitions. Word has length 20 [2021-06-05 22:01:58,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:58,271 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 525 transitions. [2021-06-05 22:01:58,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:58,271 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 525 transitions. [2021-06-05 22:01:58,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:58,272 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:58,272 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:01:58,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 740 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3613 [2021-06-05 22:01:58,472 INFO L430 AbstractCegarLoop]: === Iteration 746 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:01:58,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:01:58,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1238171618, now seen corresponding path program 740 times [2021-06-05 22:01:58,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:01:58,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345463918] [2021-06-05 22:01:58,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:01:58,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:01:58,688 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:58,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:01:58,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345463918] [2021-06-05 22:01:58,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345463918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:58,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882393186] [2021-06-05 22:01:58,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 741 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 741 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:01:58,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:01:58,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:01:58,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:01:58,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:01:58,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:58,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:58,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:58,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:58,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:58,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:01:58,885 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:01:58,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:58,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:58,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:58,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:01:58,913 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:58,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:01:58,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:01:58,917 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:01:58,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:01:58,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:01:58,944 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 22:01:59,040 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:01:59,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882393186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:01:59,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:01:59,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:01:59,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365909713] [2021-06-05 22:01:59,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:01:59,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:01:59,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:01:59,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:01:59,041 INFO L87 Difference]: Start difference. First operand 241 states and 525 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:59,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:01:59,810 INFO L93 Difference]: Finished difference Result 283 states and 610 transitions. [2021-06-05 22:01:59,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:01:59,810 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:01:59,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:01:59,810 INFO L225 Difference]: With dead ends: 283 [2021-06-05 22:01:59,811 INFO L226 Difference]: Without dead ends: 274 [2021-06-05 22:01:59,811 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 869.5ms TimeCoverageRelationStatistics Valid=140, Invalid=1192, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:01:59,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-06-05 22:01:59,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 240. [2021-06-05 22:01:59,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.188284518828452) internal successors, (523), 239 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:59,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 523 transitions. [2021-06-05 22:01:59,813 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 523 transitions. Word has length 20 [2021-06-05 22:01:59,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:01:59,813 INFO L482 AbstractCegarLoop]: Abstraction has 240 states and 523 transitions. [2021-06-05 22:01:59,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:01:59,813 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 523 transitions. [2021-06-05 22:01:59,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:01:59,813 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:01:59,813 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:00,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3618,741 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:00,013 INFO L430 AbstractCegarLoop]: === Iteration 747 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:00,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:00,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1629968974, now seen corresponding path program 741 times [2021-06-05 22:02:00,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:00,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011923295] [2021-06-05 22:02:00,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:00,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:00,183 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:00,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:00,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011923295] [2021-06-05 22:02:00,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011923295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:00,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46252703] [2021-06-05 22:02:00,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 742 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 742 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:00,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:02:00,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:00,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:00,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:00,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:00,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:00,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:02:00,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:00,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:00,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:02:00,380 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:00,402 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-06-05 22:02:00,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:00,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:02:00,406 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:00,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:00,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:02:00,413 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:02:00,454 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:00,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46252703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:00,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:00,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:02:00,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068258424] [2021-06-05 22:02:00,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:02:00,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:00,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:02:00,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:02:00,455 INFO L87 Difference]: Start difference. First operand 240 states and 523 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:00,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:00,721 INFO L93 Difference]: Finished difference Result 270 states and 578 transitions. [2021-06-05 22:02:00,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:02:00,721 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:00,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:00,722 INFO L225 Difference]: With dead ends: 270 [2021-06-05 22:02:00,722 INFO L226 Difference]: Without dead ends: 257 [2021-06-05 22:02:00,722 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 413.2ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:02:00,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-06-05 22:02:00,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 244. [2021-06-05 22:02:00,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.185185185185185) internal successors, (531), 243 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:00,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 531 transitions. [2021-06-05 22:02:00,724 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 531 transitions. Word has length 20 [2021-06-05 22:02:00,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:00,724 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 531 transitions. [2021-06-05 22:02:00,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:00,724 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 531 transitions. [2021-06-05 22:02:00,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:00,724 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:00,724 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:00,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3621,742 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:00,924 INFO L430 AbstractCegarLoop]: === Iteration 748 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:00,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:00,925 INFO L82 PathProgramCache]: Analyzing trace with hash -493783702, now seen corresponding path program 742 times [2021-06-05 22:02:00,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:00,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751187463] [2021-06-05 22:02:00,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:00,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:01,133 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:01,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:01,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751187463] [2021-06-05 22:02:01,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751187463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:01,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356286786] [2021-06-05 22:02:01,133 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 743 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 743 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:01,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:02:01,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:01,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:01,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:01,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:01,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:01,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:01,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:01,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:01,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:01,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:01,306 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:01,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:01,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:01,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:01,310 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:01,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:01,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:01,313 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:01,368 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-06-05 22:02:01,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:01,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:01,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:02:01,372 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:01,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:01,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:01,376 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:01,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:01,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:02:01,400 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 22:02:01,480 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:01,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356286786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:01,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:01,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:02:01,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788742542] [2021-06-05 22:02:01,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:02:01,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:01,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:02:01,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:02:01,480 INFO L87 Difference]: Start difference. First operand 244 states and 531 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:01,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:01,813 INFO L93 Difference]: Finished difference Result 270 states and 576 transitions. [2021-06-05 22:02:01,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:02:01,814 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:01,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:01,814 INFO L225 Difference]: With dead ends: 270 [2021-06-05 22:02:01,814 INFO L226 Difference]: Without dead ends: 258 [2021-06-05 22:02:01,814 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 463.6ms TimeCoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:02:01,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-06-05 22:02:01,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 243. [2021-06-05 22:02:01,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.1859504132231407) internal successors, (529), 242 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:01,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 529 transitions. [2021-06-05 22:02:01,816 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 529 transitions. Word has length 20 [2021-06-05 22:02:01,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:01,816 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 529 transitions. [2021-06-05 22:02:01,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:01,816 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 529 transitions. [2021-06-05 22:02:01,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:01,816 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:01,816 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:02,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3622,743 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:02,017 INFO L430 AbstractCegarLoop]: === Iteration 749 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:02,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:02,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1655012834, now seen corresponding path program 743 times [2021-06-05 22:02:02,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:02,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528179864] [2021-06-05 22:02:02,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:02,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:02,233 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:02,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:02,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528179864] [2021-06-05 22:02:02,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528179864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:02,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297983796] [2021-06-05 22:02:02,233 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 744 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 744 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:02,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:02:02,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:02,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:02,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:02,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:02,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:02,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:02,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:02,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:02,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:02,427 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:02,487 INFO L628 ElimStorePlain]: treesize reduction 95, result has 40.6 percent of original size [2021-06-05 22:02:02,487 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 22:02:02,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:02,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:02,490 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:02,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:02,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:02,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:02,516 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:02,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:02,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:02:02,538 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:173, output treesize:36 [2021-06-05 22:02:02,622 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:02,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297983796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:02,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:02,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:02:02,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026748761] [2021-06-05 22:02:02,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:02:02,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:02,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:02:02,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:02:02,623 INFO L87 Difference]: Start difference. First operand 243 states and 529 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:03,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:03,132 INFO L93 Difference]: Finished difference Result 302 states and 636 transitions. [2021-06-05 22:02:03,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:02:03,132 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:03,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:03,132 INFO L225 Difference]: With dead ends: 302 [2021-06-05 22:02:03,132 INFO L226 Difference]: Without dead ends: 283 [2021-06-05 22:02:03,132 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 678.7ms TimeCoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:02:03,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-06-05 22:02:03,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 242. [2021-06-05 22:02:03,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.1867219917012446) internal successors, (527), 241 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:03,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 527 transitions. [2021-06-05 22:02:03,134 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 527 transitions. Word has length 20 [2021-06-05 22:02:03,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:03,134 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 527 transitions. [2021-06-05 22:02:03,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:03,134 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 527 transitions. [2021-06-05 22:02:03,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:03,135 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:03,135 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:03,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3625,744 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:03,335 INFO L430 AbstractCegarLoop]: === Iteration 750 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:03,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:03,335 INFO L82 PathProgramCache]: Analyzing trace with hash -451771286, now seen corresponding path program 744 times [2021-06-05 22:02:03,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:03,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156933075] [2021-06-05 22:02:03,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:03,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:03,566 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:03,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:03,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156933075] [2021-06-05 22:02:03,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156933075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:03,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081809358] [2021-06-05 22:02:03,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 745 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 745 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:03,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:02:03,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:03,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:03,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:03,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:03,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:03,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:03,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:03,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:03,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:03,792 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:03,853 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-06-05 22:02:03,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:03,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:03,857 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:03,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:03,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:03,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:03,884 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:03,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:03,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:03,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:02:03,909 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:03,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:03,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:02:03,930 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:02:04,014 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:04,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081809358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:04,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:04,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:02:04,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437789362] [2021-06-05 22:02:04,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:02:04,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:04,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:02:04,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:02:04,015 INFO L87 Difference]: Start difference. First operand 242 states and 527 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:04,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:04,694 INFO L93 Difference]: Finished difference Result 302 states and 636 transitions. [2021-06-05 22:02:04,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:02:04,694 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:04,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:04,694 INFO L225 Difference]: With dead ends: 302 [2021-06-05 22:02:04,695 INFO L226 Difference]: Without dead ends: 283 [2021-06-05 22:02:04,695 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 786.0ms TimeCoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:02:04,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-06-05 22:02:04,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 242. [2021-06-05 22:02:04,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.1867219917012446) internal successors, (527), 241 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:04,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 527 transitions. [2021-06-05 22:02:04,697 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 527 transitions. Word has length 20 [2021-06-05 22:02:04,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:04,697 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 527 transitions. [2021-06-05 22:02:04,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:04,697 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 527 transitions. [2021-06-05 22:02:04,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:04,697 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:04,697 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:04,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 745 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3630 [2021-06-05 22:02:04,897 INFO L430 AbstractCegarLoop]: === Iteration 751 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:04,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:04,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1337569566, now seen corresponding path program 745 times [2021-06-05 22:02:04,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:04,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709839004] [2021-06-05 22:02:04,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:04,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:05,109 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:05,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:05,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709839004] [2021-06-05 22:02:05,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709839004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:05,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210450812] [2021-06-05 22:02:05,109 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 746 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 746 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:05,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:05,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:05,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:05,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:05,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:05,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:05,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:05,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:05,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:05,372 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:05,434 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-06-05 22:02:05,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:05,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:05,438 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:05,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:05,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:05,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:05,465 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:05,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:05,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:05,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:05,492 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:05,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:05,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:02:05,514 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:02:05,602 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:05,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210450812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:05,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:05,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:02:05,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222437476] [2021-06-05 22:02:05,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:02:05,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:05,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:02:05,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:02:05,603 INFO L87 Difference]: Start difference. First operand 242 states and 527 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:06,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:06,129 INFO L93 Difference]: Finished difference Result 306 states and 644 transitions. [2021-06-05 22:02:06,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:02:06,129 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:06,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:06,129 INFO L225 Difference]: With dead ends: 306 [2021-06-05 22:02:06,129 INFO L226 Difference]: Without dead ends: 287 [2021-06-05 22:02:06,130 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 684.1ms TimeCoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:02:06,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-06-05 22:02:06,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 242. [2021-06-05 22:02:06,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.1867219917012446) internal successors, (527), 241 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:06,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 527 transitions. [2021-06-05 22:02:06,131 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 527 transitions. Word has length 20 [2021-06-05 22:02:06,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:06,132 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 527 transitions. [2021-06-05 22:02:06,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:06,132 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 527 transitions. [2021-06-05 22:02:06,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:06,132 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:06,132 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:06,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3635,746 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:06,332 INFO L430 AbstractCegarLoop]: === Iteration 752 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:06,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:06,332 INFO L82 PathProgramCache]: Analyzing trace with hash 885185066, now seen corresponding path program 746 times [2021-06-05 22:02:06,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:06,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787058926] [2021-06-05 22:02:06,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:06,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:06,529 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:06,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:06,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787058926] [2021-06-05 22:02:06,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787058926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:06,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301357480] [2021-06-05 22:02:06,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 747 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 747 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:06,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:02:06,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:06,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:02:06,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:06,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:06,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:02:06,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:06,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:06,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:06,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:02:06,773 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:06,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:06,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:02:06,781 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-06-05 22:02:06,827 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:06,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301357480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:06,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:06,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:02:06,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396477461] [2021-06-05 22:02:06,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:02:06,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:06,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:02:06,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:02:06,828 INFO L87 Difference]: Start difference. First operand 242 states and 527 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:07,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:07,165 INFO L93 Difference]: Finished difference Result 271 states and 578 transitions. [2021-06-05 22:02:07,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:02:07,166 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:07,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:07,166 INFO L225 Difference]: With dead ends: 271 [2021-06-05 22:02:07,166 INFO L226 Difference]: Without dead ends: 264 [2021-06-05 22:02:07,166 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 482.1ms TimeCoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:02:07,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-06-05 22:02:07,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 247. [2021-06-05 22:02:07,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.186991869918699) internal successors, (538), 246 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:07,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 538 transitions. [2021-06-05 22:02:07,168 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 538 transitions. Word has length 20 [2021-06-05 22:02:07,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:07,168 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 538 transitions. [2021-06-05 22:02:07,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:07,168 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 538 transitions. [2021-06-05 22:02:07,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:07,168 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:07,168 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:07,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3640,747 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:07,369 INFO L430 AbstractCegarLoop]: === Iteration 753 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:07,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:07,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1837538274, now seen corresponding path program 747 times [2021-06-05 22:02:07,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:07,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620282006] [2021-06-05 22:02:07,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:07,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:07,594 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:07,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:07,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620282006] [2021-06-05 22:02:07,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620282006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:07,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45172005] [2021-06-05 22:02:07,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 748 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 748 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:07,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:02:07,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:07,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:02:07,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:07,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:07,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:07,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:07,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:07,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:07,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:07,809 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:07,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:07,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:07,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:07,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:02:07,836 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:07,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:07,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:02:07,840 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:07,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:07,862 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:02:07,862 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:29 [2021-06-05 22:02:07,932 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:07,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45172005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:07,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:07,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:02:07,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928698986] [2021-06-05 22:02:07,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:02:07,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:07,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:02:07,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:02:07,932 INFO L87 Difference]: Start difference. First operand 247 states and 538 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:08,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:08,576 INFO L93 Difference]: Finished difference Result 291 states and 617 transitions. [2021-06-05 22:02:08,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:02:08,577 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:08,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:08,577 INFO L225 Difference]: With dead ends: 291 [2021-06-05 22:02:08,577 INFO L226 Difference]: Without dead ends: 275 [2021-06-05 22:02:08,577 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 703.1ms TimeCoverageRelationStatistics Valid=102, Invalid=1020, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:02:08,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-06-05 22:02:08,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 248. [2021-06-05 22:02:08,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.1862348178137654) internal successors, (540), 247 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:08,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 540 transitions. [2021-06-05 22:02:08,579 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 540 transitions. Word has length 20 [2021-06-05 22:02:08,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:08,579 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 540 transitions. [2021-06-05 22:02:08,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:08,579 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 540 transitions. [2021-06-05 22:02:08,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:08,580 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:08,580 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:08,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3641,748 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:08,780 INFO L430 AbstractCegarLoop]: === Iteration 754 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:08,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:08,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1595423958, now seen corresponding path program 748 times [2021-06-05 22:02:08,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:08,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160634392] [2021-06-05 22:02:08,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:08,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:08,964 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:08,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:08,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160634392] [2021-06-05 22:02:08,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160634392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:08,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28961048] [2021-06-05 22:02:08,965 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 749 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 749 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:08,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:02:08,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:08,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:08,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:09,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:09,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:09,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:02:09,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:09,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:09,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:02:09,195 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:09,217 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-06-05 22:02:09,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:09,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:02:09,223 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:09,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:09,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:02:09,231 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:02:09,270 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:09,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28961048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:09,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:09,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:02:09,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828926558] [2021-06-05 22:02:09,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:02:09,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:09,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:02:09,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:02:09,270 INFO L87 Difference]: Start difference. First operand 248 states and 540 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:09,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:09,759 INFO L93 Difference]: Finished difference Result 290 states and 615 transitions. [2021-06-05 22:02:09,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:02:09,759 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:09,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:09,759 INFO L225 Difference]: With dead ends: 290 [2021-06-05 22:02:09,760 INFO L226 Difference]: Without dead ends: 277 [2021-06-05 22:02:09,760 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 580.5ms TimeCoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:02:09,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-06-05 22:02:09,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 249. [2021-06-05 22:02:09,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.185483870967742) internal successors, (542), 248 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:09,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 542 transitions. [2021-06-05 22:02:09,762 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 542 transitions. Word has length 20 [2021-06-05 22:02:09,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:09,762 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 542 transitions. [2021-06-05 22:02:09,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:09,762 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 542 transitions. [2021-06-05 22:02:09,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:09,762 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:09,762 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:09,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3644,749 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:09,962 INFO L430 AbstractCegarLoop]: === Iteration 755 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:09,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:09,963 INFO L82 PathProgramCache]: Analyzing trace with hash -459238686, now seen corresponding path program 749 times [2021-06-05 22:02:09,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:09,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097504852] [2021-06-05 22:02:09,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:09,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:10,116 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:10,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:10,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097504852] [2021-06-05 22:02:10,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097504852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:10,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290964534] [2021-06-05 22:02:10,116 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 750 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 750 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:10,142 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:02:10,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:10,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:10,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:10,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:10,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:10,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:10,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:10,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:10,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:10,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:10,319 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:10,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:10,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:10,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:10,323 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:10,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:10,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:10,326 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:10,381 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-06-05 22:02:10,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:10,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:10,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:02:10,385 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:10,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:10,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:10,389 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:10,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:10,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:02:10,416 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 22:02:10,494 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:10,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290964534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:10,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:10,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:02:10,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283449373] [2021-06-05 22:02:10,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:02:10,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:10,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:02:10,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:02:10,495 INFO L87 Difference]: Start difference. First operand 249 states and 542 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:10,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:10,958 INFO L93 Difference]: Finished difference Result 317 states and 659 transitions. [2021-06-05 22:02:10,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:02:10,959 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:10,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:10,959 INFO L225 Difference]: With dead ends: 317 [2021-06-05 22:02:10,959 INFO L226 Difference]: Without dead ends: 298 [2021-06-05 22:02:10,959 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 547.9ms TimeCoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:02:10,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-06-05 22:02:10,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 245. [2021-06-05 22:02:10,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.1844262295081966) internal successors, (533), 244 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:10,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 533 transitions. [2021-06-05 22:02:10,961 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 533 transitions. Word has length 20 [2021-06-05 22:02:10,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:10,961 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 533 transitions. [2021-06-05 22:02:10,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:10,961 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 533 transitions. [2021-06-05 22:02:10,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:10,961 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:10,961 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:11,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 750 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3645 [2021-06-05 22:02:11,162 INFO L430 AbstractCegarLoop]: === Iteration 756 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:11,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:11,162 INFO L82 PathProgramCache]: Analyzing trace with hash 951739994, now seen corresponding path program 750 times [2021-06-05 22:02:11,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:11,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256151575] [2021-06-05 22:02:11,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:11,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:11,355 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:11,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:11,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256151575] [2021-06-05 22:02:11,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256151575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:11,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730681500] [2021-06-05 22:02:11,355 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 751 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 751 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:11,382 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:02:11,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:11,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:11,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:11,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:11,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:11,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:02:11,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:11,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:11,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:02:11,561 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:11,586 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-06-05 22:02:11,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:11,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:02:11,589 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:11,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:11,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:02:11,596 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:02:11,639 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:11,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730681500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:11,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:11,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:02:11,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102708087] [2021-06-05 22:02:11,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:02:11,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:11,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:02:11,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:02:11,639 INFO L87 Difference]: Start difference. First operand 245 states and 533 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:11,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:11,952 INFO L93 Difference]: Finished difference Result 270 states and 574 transitions. [2021-06-05 22:02:11,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:02:11,952 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:11,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:11,952 INFO L225 Difference]: With dead ends: 270 [2021-06-05 22:02:11,952 INFO L226 Difference]: Without dead ends: 254 [2021-06-05 22:02:11,952 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 476.2ms TimeCoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:02:11,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-06-05 22:02:11,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 247. [2021-06-05 22:02:11,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.182926829268293) internal successors, (537), 246 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:11,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 537 transitions. [2021-06-05 22:02:11,954 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 537 transitions. Word has length 20 [2021-06-05 22:02:11,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:11,954 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 537 transitions. [2021-06-05 22:02:11,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:11,954 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 537 transitions. [2021-06-05 22:02:11,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:11,955 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:11,955 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:12,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3648,751 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:12,155 INFO L430 AbstractCegarLoop]: === Iteration 757 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:12,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:12,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1813745058, now seen corresponding path program 751 times [2021-06-05 22:02:12,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:12,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197512474] [2021-06-05 22:02:12,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:12,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:12,355 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:12,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:12,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197512474] [2021-06-05 22:02:12,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197512474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:12,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002424564] [2021-06-05 22:02:12,356 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 752 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 752 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:12,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:12,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:12,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:12,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:12,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:12,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:02:12,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:12,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:12,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:02:12,586 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:12,608 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-06-05 22:02:12,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:12,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:02:12,612 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:12,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:12,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:02:12,619 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:02:12,657 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:12,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002424564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:12,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:12,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:02:12,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371457905] [2021-06-05 22:02:12,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:02:12,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:12,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:02:12,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:02:12,658 INFO L87 Difference]: Start difference. First operand 247 states and 537 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:13,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:13,119 INFO L93 Difference]: Finished difference Result 280 states and 594 transitions. [2021-06-05 22:02:13,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:02:13,120 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:13,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:13,120 INFO L225 Difference]: With dead ends: 280 [2021-06-05 22:02:13,120 INFO L226 Difference]: Without dead ends: 261 [2021-06-05 22:02:13,120 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 580.6ms TimeCoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:02:13,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-06-05 22:02:13,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 248. [2021-06-05 22:02:13,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.182186234817814) internal successors, (539), 247 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:13,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 539 transitions. [2021-06-05 22:02:13,122 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 539 transitions. Word has length 20 [2021-06-05 22:02:13,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:13,122 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 539 transitions. [2021-06-05 22:02:13,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:13,122 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 539 transitions. [2021-06-05 22:02:13,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:13,122 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:13,123 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:13,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 752 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3649 [2021-06-05 22:02:13,323 INFO L430 AbstractCegarLoop]: === Iteration 758 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:13,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:13,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1345036966, now seen corresponding path program 752 times [2021-06-05 22:02:13,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:13,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928257468] [2021-06-05 22:02:13,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:13,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:13,536 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:13,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:13,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928257468] [2021-06-05 22:02:13,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928257468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:13,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351461405] [2021-06-05 22:02:13,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 753 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 753 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:13,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:02:13,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:13,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:02:13,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:13,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:13,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:13,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:13,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:13,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:13,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:13,725 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:13,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:13,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:13,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:13,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:02:13,750 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:13,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:13,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:13,754 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:13,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:13,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:02:13,775 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 22:02:13,854 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:13,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351461405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:13,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:13,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:02:13,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92337006] [2021-06-05 22:02:13,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:02:13,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:13,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:02:13,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:02:13,855 INFO L87 Difference]: Start difference. First operand 248 states and 539 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:14,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:14,475 INFO L93 Difference]: Finished difference Result 299 states and 629 transitions. [2021-06-05 22:02:14,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:02:14,475 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:14,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:14,475 INFO L225 Difference]: With dead ends: 299 [2021-06-05 22:02:14,475 INFO L226 Difference]: Without dead ends: 283 [2021-06-05 22:02:14,476 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 802.6ms TimeCoverageRelationStatistics Valid=124, Invalid=1066, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:02:14,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-06-05 22:02:14,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 246. [2021-06-05 22:02:14,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.183673469387755) internal successors, (535), 245 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:14,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 535 transitions. [2021-06-05 22:02:14,478 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 535 transitions. Word has length 20 [2021-06-05 22:02:14,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:14,478 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 535 transitions. [2021-06-05 22:02:14,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:14,478 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 535 transitions. [2021-06-05 22:02:14,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:14,478 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:14,478 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:14,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 753 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3650 [2021-06-05 22:02:14,678 INFO L430 AbstractCegarLoop]: === Iteration 759 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:14,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:14,679 INFO L82 PathProgramCache]: Analyzing trace with hash -293039062, now seen corresponding path program 753 times [2021-06-05 22:02:14,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:14,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890951348] [2021-06-05 22:02:14,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:14,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:14,858 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:14,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:14,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890951348] [2021-06-05 22:02:14,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890951348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:14,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470182343] [2021-06-05 22:02:14,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 754 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 754 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:14,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:02:14,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:14,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:14,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:15,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:15,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:15,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:02:15,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:15,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:15,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:02:15,065 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:15,094 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-06-05 22:02:15,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:15,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:02:15,097 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:15,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:15,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:02:15,105 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:02:15,145 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:15,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470182343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:15,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:15,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:02:15,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355556066] [2021-06-05 22:02:15,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:02:15,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:15,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:02:15,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:02:15,145 INFO L87 Difference]: Start difference. First operand 246 states and 535 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:15,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:15,460 INFO L93 Difference]: Finished difference Result 277 states and 592 transitions. [2021-06-05 22:02:15,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:02:15,460 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:15,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:15,461 INFO L225 Difference]: With dead ends: 277 [2021-06-05 22:02:15,461 INFO L226 Difference]: Without dead ends: 264 [2021-06-05 22:02:15,461 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 469.4ms TimeCoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:02:15,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-06-05 22:02:15,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 248. [2021-06-05 22:02:15,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.182186234817814) internal successors, (539), 247 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:15,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 539 transitions. [2021-06-05 22:02:15,463 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 539 transitions. Word has length 20 [2021-06-05 22:02:15,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:15,463 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 539 transitions. [2021-06-05 22:02:15,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:15,463 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 539 transitions. [2021-06-05 22:02:15,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:15,463 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:15,463 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:15,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3653,754 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:15,664 INFO L430 AbstractCegarLoop]: === Iteration 760 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:15,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:15,664 INFO L82 PathProgramCache]: Analyzing trace with hash 843146210, now seen corresponding path program 754 times [2021-06-05 22:02:15,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:15,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255273574] [2021-06-05 22:02:15,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:15,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:15,859 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:15,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:15,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255273574] [2021-06-05 22:02:15,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255273574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:15,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309418272] [2021-06-05 22:02:15,860 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 755 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 755 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:15,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:02:15,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:15,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:15,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:16,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:16,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:16,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:16,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:16,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:16,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:16,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:16,031 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:16,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:16,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:16,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:16,035 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:16,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:16,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:16,038 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:16,092 INFO L628 ElimStorePlain]: treesize reduction 77, result has 45.4 percent of original size [2021-06-05 22:02:16,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:16,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:16,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:02:16,097 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:16,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:16,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:02:16,100 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:16,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:16,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:02:16,124 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 22:02:16,200 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:16,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309418272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:16,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:16,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:02:16,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289659915] [2021-06-05 22:02:16,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:02:16,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:16,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:02:16,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:02:16,201 INFO L87 Difference]: Start difference. First operand 248 states and 539 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:16,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:16,631 INFO L93 Difference]: Finished difference Result 301 states and 630 transitions. [2021-06-05 22:02:16,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:02:16,631 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:16,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:16,632 INFO L225 Difference]: With dead ends: 301 [2021-06-05 22:02:16,632 INFO L226 Difference]: Without dead ends: 282 [2021-06-05 22:02:16,632 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 596.7ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:02:16,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-06-05 22:02:16,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 245. [2021-06-05 22:02:16,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.1844262295081966) internal successors, (533), 244 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:16,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 533 transitions. [2021-06-05 22:02:16,634 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 533 transitions. Word has length 20 [2021-06-05 22:02:16,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:16,634 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 533 transitions. [2021-06-05 22:02:16,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:16,634 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 533 transitions. [2021-06-05 22:02:16,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:16,634 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:16,634 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:16,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3654,755 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:16,835 INFO L430 AbstractCegarLoop]: === Iteration 761 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:16,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:16,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1303024550, now seen corresponding path program 755 times [2021-06-05 22:02:16,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:16,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007210972] [2021-06-05 22:02:16,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:16,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:17,056 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:17,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:17,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007210972] [2021-06-05 22:02:17,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007210972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:17,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790313595] [2021-06-05 22:02:17,057 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 756 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 756 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:17,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:02:17,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:17,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:17,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:17,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:17,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:17,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:17,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:17,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:17,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:17,267 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:17,327 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-06-05 22:02:17,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:17,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:17,331 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:17,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:17,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:17,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:02:17,357 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:17,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:17,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:17,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:02:17,383 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:17,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:17,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:02:17,408 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:02:17,489 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:17,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790313595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:17,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:17,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:02:17,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090620997] [2021-06-05 22:02:17,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:02:17,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:17,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:02:17,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:02:17,490 INFO L87 Difference]: Start difference. First operand 245 states and 533 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:18,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:18,059 INFO L93 Difference]: Finished difference Result 313 states and 658 transitions. [2021-06-05 22:02:18,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:02:18,059 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:18,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:18,059 INFO L225 Difference]: With dead ends: 313 [2021-06-05 22:02:18,059 INFO L226 Difference]: Without dead ends: 294 [2021-06-05 22:02:18,060 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 668.2ms TimeCoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:02:18,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-06-05 22:02:18,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 242. [2021-06-05 22:02:18,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.1867219917012446) internal successors, (527), 241 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:18,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 527 transitions. [2021-06-05 22:02:18,062 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 527 transitions. Word has length 20 [2021-06-05 22:02:18,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:18,062 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 527 transitions. [2021-06-05 22:02:18,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:18,062 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 527 transitions. [2021-06-05 22:02:18,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:18,062 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:18,062 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:18,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3657,756 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:18,262 INFO L430 AbstractCegarLoop]: === Iteration 762 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:18,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:18,263 INFO L82 PathProgramCache]: Analyzing trace with hash -738202910, now seen corresponding path program 756 times [2021-06-05 22:02:18,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:18,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427932660] [2021-06-05 22:02:18,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:18,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:18,449 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:18,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:18,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427932660] [2021-06-05 22:02:18,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427932660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:18,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979996235] [2021-06-05 22:02:18,450 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 757 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 757 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:18,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:02:18,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:18,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:02:18,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:18,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:18,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:18,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:18,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:18,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:18,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:18,642 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:18,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:18,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:18,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:18,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:02:18,665 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:18,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:18,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:02:18,668 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:18,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:18,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:02:18,687 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:29 [2021-06-05 22:02:18,738 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:18,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979996235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:18,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:18,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:02:18,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014351104] [2021-06-05 22:02:18,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:02:18,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:18,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:02:18,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:02:18,739 INFO L87 Difference]: Start difference. First operand 242 states and 527 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:19,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:19,219 INFO L93 Difference]: Finished difference Result 277 states and 596 transitions. [2021-06-05 22:02:19,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:02:19,220 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:19,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:19,220 INFO L225 Difference]: With dead ends: 277 [2021-06-05 22:02:19,220 INFO L226 Difference]: Without dead ends: 270 [2021-06-05 22:02:19,220 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 510.5ms TimeCoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:02:19,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-06-05 22:02:19,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 245. [2021-06-05 22:02:19,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.1885245901639343) internal successors, (534), 244 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:19,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 534 transitions. [2021-06-05 22:02:19,222 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 534 transitions. Word has length 20 [2021-06-05 22:02:19,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:19,222 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 534 transitions. [2021-06-05 22:02:19,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:19,222 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 534 transitions. [2021-06-05 22:02:19,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:19,223 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:19,223 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:19,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3662,757 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:19,423 INFO L430 AbstractCegarLoop]: === Iteration 763 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:19,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:19,423 INFO L82 PathProgramCache]: Analyzing trace with hash 123802154, now seen corresponding path program 757 times [2021-06-05 22:02:19,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:19,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405960902] [2021-06-05 22:02:19,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:19,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:19,618 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:19,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:19,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405960902] [2021-06-05 22:02:19,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405960902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:19,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131503786] [2021-06-05 22:02:19,618 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 758 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 758 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:19,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:19,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:19,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:19,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:19,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:19,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:02:19,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:19,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:19,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:02:19,837 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:19,859 INFO L628 ElimStorePlain]: treesize reduction 36, result has 47.8 percent of original size [2021-06-05 22:02:19,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:19,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:02:19,861 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:19,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:19,869 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:02:19,869 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:02:19,910 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:19,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131503786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:19,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:19,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:02:19,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907952892] [2021-06-05 22:02:19,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:02:19,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:19,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:02:19,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:02:19,911 INFO L87 Difference]: Start difference. First operand 245 states and 534 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:20,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:20,389 INFO L93 Difference]: Finished difference Result 287 states and 606 transitions. [2021-06-05 22:02:20,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:02:20,389 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:20,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:20,389 INFO L225 Difference]: With dead ends: 287 [2021-06-05 22:02:20,390 INFO L226 Difference]: Without dead ends: 268 [2021-06-05 22:02:20,390 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 561.0ms TimeCoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:02:20,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-06-05 22:02:20,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 246. [2021-06-05 22:02:20,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.1877551020408164) internal successors, (536), 245 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:20,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 536 transitions. [2021-06-05 22:02:20,392 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 536 transitions. Word has length 20 [2021-06-05 22:02:20,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:20,392 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 536 transitions. [2021-06-05 22:02:20,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:20,392 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 536 transitions. [2021-06-05 22:02:20,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:20,392 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:20,392 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:20,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3665,758 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:20,593 INFO L430 AbstractCegarLoop]: === Iteration 764 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:20,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:20,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1259987426, now seen corresponding path program 758 times [2021-06-05 22:02:20,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:20,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401552183] [2021-06-05 22:02:20,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:20,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:20,819 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:20,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:20,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401552183] [2021-06-05 22:02:20,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401552183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:20,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155148206] [2021-06-05 22:02:20,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 759 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 759 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:20,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:02:20,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:20,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:02:20,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:20,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:20,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:20,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:20,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:20,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:20,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:21,000 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:21,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:21,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:21,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:21,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:02:21,029 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:21,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:21,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:02:21,033 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:21,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:21,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:02:21,054 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 22:02:21,130 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:21,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155148206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:21,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:21,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:02:21,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093659603] [2021-06-05 22:02:21,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:02:21,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:21,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:02:21,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:02:21,131 INFO L87 Difference]: Start difference. First operand 246 states and 536 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:21,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:21,633 INFO L93 Difference]: Finished difference Result 306 states and 641 transitions. [2021-06-05 22:02:21,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:02:21,634 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:21,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:21,634 INFO L225 Difference]: With dead ends: 306 [2021-06-05 22:02:21,634 INFO L226 Difference]: Without dead ends: 290 [2021-06-05 22:02:21,634 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 648.5ms TimeCoverageRelationStatistics Valid=123, Invalid=999, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:02:21,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-06-05 22:02:21,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 244. [2021-06-05 22:02:21,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.185185185185185) internal successors, (531), 243 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:21,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 531 transitions. [2021-06-05 22:02:21,636 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 531 transitions. Word has length 20 [2021-06-05 22:02:21,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:21,636 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 531 transitions. [2021-06-05 22:02:21,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:21,637 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 531 transitions. [2021-06-05 22:02:21,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:21,637 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:21,637 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:21,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 759 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3666 [2021-06-05 22:02:21,837 INFO L430 AbstractCegarLoop]: === Iteration 765 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:21,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:21,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1982981966, now seen corresponding path program 759 times [2021-06-05 22:02:21,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:21,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706037388] [2021-06-05 22:02:21,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:21,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:22,058 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:22,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:22,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706037388] [2021-06-05 22:02:22,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706037388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:22,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829591179] [2021-06-05 22:02:22,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 760 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 760 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:22,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:02:22,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:22,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:22,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:22,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:22,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:22,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:02:22,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:22,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:22,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:02:22,272 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:22,294 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-06-05 22:02:22,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:22,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:02:22,298 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:22,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:22,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:02:22,305 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:02:22,345 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:22,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829591179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:22,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:22,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:02:22,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941686255] [2021-06-05 22:02:22,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:02:22,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:22,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:02:22,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:02:22,346 INFO L87 Difference]: Start difference. First operand 244 states and 531 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:22,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:22,668 INFO L93 Difference]: Finished difference Result 267 states and 572 transitions. [2021-06-05 22:02:22,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:02:22,669 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:22,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:22,669 INFO L225 Difference]: With dead ends: 267 [2021-06-05 22:02:22,669 INFO L226 Difference]: Without dead ends: 254 [2021-06-05 22:02:22,669 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 531.3ms TimeCoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:02:22,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-06-05 22:02:22,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 246. [2021-06-05 22:02:22,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.183673469387755) internal successors, (535), 245 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:22,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 535 transitions. [2021-06-05 22:02:22,671 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 535 transitions. Word has length 20 [2021-06-05 22:02:22,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:22,671 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 535 transitions. [2021-06-05 22:02:22,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:22,671 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 535 transitions. [2021-06-05 22:02:22,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:22,671 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:22,671 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:22,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3669,760 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:22,872 INFO L430 AbstractCegarLoop]: === Iteration 766 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:22,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:22,872 INFO L82 PathProgramCache]: Analyzing trace with hash -846796694, now seen corresponding path program 760 times [2021-06-05 22:02:22,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:22,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118281713] [2021-06-05 22:02:22,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:22,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:23,027 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:23,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:23,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118281713] [2021-06-05 22:02:23,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118281713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:23,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352304939] [2021-06-05 22:02:23,027 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 761 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 761 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:23,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:02:23,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:23,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:23,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:23,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:23,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:23,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:23,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:23,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:23,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:23,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:23,191 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:23,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:23,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:23,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:23,195 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:23,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:23,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:23,198 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:23,252 INFO L628 ElimStorePlain]: treesize reduction 83, result has 44.7 percent of original size [2021-06-05 22:02:23,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:23,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:23,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:23,256 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:23,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:23,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:02:23,260 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:23,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:23,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:02:23,284 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 22:02:23,362 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:23,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352304939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:23,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:23,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:02:23,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148842775] [2021-06-05 22:02:23,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:02:23,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:23,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:02:23,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:02:23,363 INFO L87 Difference]: Start difference. First operand 246 states and 535 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:23,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:23,774 INFO L93 Difference]: Finished difference Result 286 states and 599 transitions. [2021-06-05 22:02:23,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:02:23,774 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:23,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:23,775 INFO L225 Difference]: With dead ends: 286 [2021-06-05 22:02:23,775 INFO L226 Difference]: Without dead ends: 267 [2021-06-05 22:02:23,775 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 515.9ms TimeCoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:02:23,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-06-05 22:02:23,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 245. [2021-06-05 22:02:23,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.1844262295081966) internal successors, (533), 244 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:23,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 533 transitions. [2021-06-05 22:02:23,777 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 533 transitions. Word has length 20 [2021-06-05 22:02:23,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:23,777 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 533 transitions. [2021-06-05 22:02:23,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:23,777 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 533 transitions. [2021-06-05 22:02:23,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:23,777 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:23,777 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:23,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 761 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3670 [2021-06-05 22:02:23,977 INFO L430 AbstractCegarLoop]: === Iteration 767 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:23,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:23,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1301999842, now seen corresponding path program 761 times [2021-06-05 22:02:23,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:23,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613765438] [2021-06-05 22:02:23,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:23,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:24,201 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:24,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:24,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613765438] [2021-06-05 22:02:24,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613765438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:24,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926375850] [2021-06-05 22:02:24,201 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 762 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 762 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:24,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:02:24,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:24,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:24,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:24,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:24,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:24,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:24,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:24,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:24,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:24,388 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:24,448 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-06-05 22:02:24,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:24,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:24,453 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:24,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:24,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:24,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:24,479 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:24,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:24,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:24,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:24,508 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:24,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:24,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:02:24,530 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:02:24,611 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:24,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926375850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:24,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:24,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:02:24,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648092254] [2021-06-05 22:02:24,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:02:24,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:24,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:02:24,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:02:24,612 INFO L87 Difference]: Start difference. First operand 245 states and 533 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:25,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:25,162 INFO L93 Difference]: Finished difference Result 306 states and 640 transitions. [2021-06-05 22:02:25,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:02:25,162 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:25,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:25,163 INFO L225 Difference]: With dead ends: 306 [2021-06-05 22:02:25,163 INFO L226 Difference]: Without dead ends: 284 [2021-06-05 22:02:25,163 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 686.8ms TimeCoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:02:25,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-06-05 22:02:25,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 242. [2021-06-05 22:02:25,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.1867219917012446) internal successors, (527), 241 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:25,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 527 transitions. [2021-06-05 22:02:25,165 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 527 transitions. Word has length 20 [2021-06-05 22:02:25,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:25,165 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 527 transitions. [2021-06-05 22:02:25,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:25,165 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 527 transitions. [2021-06-05 22:02:25,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:25,165 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:25,165 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:25,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3673,762 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:25,365 INFO L430 AbstractCegarLoop]: === Iteration 768 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:25,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:25,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1426187050, now seen corresponding path program 762 times [2021-06-05 22:02:25,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:25,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141630994] [2021-06-05 22:02:25,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:25,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:25,565 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:25,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:25,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141630994] [2021-06-05 22:02:25,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141630994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:25,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376509873] [2021-06-05 22:02:25,565 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 763 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 763 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:25,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:02:25,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:25,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:25,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:25,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:25,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:25,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:02:25,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:25,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:25,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:02:25,779 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:25,801 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-06-05 22:02:25,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:25,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:02:25,805 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:25,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:25,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:02:25,812 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:02:25,851 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:25,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376509873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:25,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:25,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:02:25,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712413102] [2021-06-05 22:02:25,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:02:25,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:25,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:02:25,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:02:25,852 INFO L87 Difference]: Start difference. First operand 242 states and 527 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:26,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:26,134 INFO L93 Difference]: Finished difference Result 266 states and 567 transitions. [2021-06-05 22:02:26,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:02:26,134 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:26,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:26,134 INFO L225 Difference]: With dead ends: 266 [2021-06-05 22:02:26,134 INFO L226 Difference]: Without dead ends: 253 [2021-06-05 22:02:26,135 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 460.6ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:02:26,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-06-05 22:02:26,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 245. [2021-06-05 22:02:26,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.1844262295081966) internal successors, (533), 244 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:26,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 533 transitions. [2021-06-05 22:02:26,136 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 533 transitions. Word has length 20 [2021-06-05 22:02:26,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:26,136 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 533 transitions. [2021-06-05 22:02:26,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:26,137 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 533 transitions. [2021-06-05 22:02:26,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:26,137 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:26,137 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:26,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3678,763 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:26,337 INFO L430 AbstractCegarLoop]: === Iteration 769 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:26,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:26,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1732594974, now seen corresponding path program 763 times [2021-06-05 22:02:26,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:26,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112967720] [2021-06-05 22:02:26,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:26,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:26,562 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:26,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:26,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112967720] [2021-06-05 22:02:26,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112967720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:26,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238833742] [2021-06-05 22:02:26,563 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 764 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 764 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:26,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:26,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:26,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:26,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:26,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:26,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:26,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:26,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:26,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:26,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:26,735 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:26,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:26,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:26,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:26,739 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:26,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:26,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:26,742 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:26,795 INFO L628 ElimStorePlain]: treesize reduction 87, result has 39.6 percent of original size [2021-06-05 22:02:26,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:26,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:02:26,804 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:26,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:26,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:02:26,829 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:173, output treesize:36 [2021-06-05 22:02:26,908 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:26,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238833742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:26,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:26,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:02:26,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801107355] [2021-06-05 22:02:26,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:02:26,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:26,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:02:26,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:02:26,909 INFO L87 Difference]: Start difference. First operand 245 states and 533 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:27,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:27,371 INFO L93 Difference]: Finished difference Result 299 states and 623 transitions. [2021-06-05 22:02:27,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:02:27,372 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:27,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:27,372 INFO L225 Difference]: With dead ends: 299 [2021-06-05 22:02:27,372 INFO L226 Difference]: Without dead ends: 277 [2021-06-05 22:02:27,372 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 625.2ms TimeCoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:02:27,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-06-05 22:02:27,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 242. [2021-06-05 22:02:27,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.1867219917012446) internal successors, (527), 241 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:27,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 527 transitions. [2021-06-05 22:02:27,374 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 527 transitions. Word has length 20 [2021-06-05 22:02:27,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:27,374 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 527 transitions. [2021-06-05 22:02:27,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:27,374 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 527 transitions. [2021-06-05 22:02:27,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:27,374 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:27,375 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:27,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 764 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3679 [2021-06-05 22:02:27,575 INFO L430 AbstractCegarLoop]: === Iteration 770 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:27,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:27,575 INFO L82 PathProgramCache]: Analyzing trace with hash 416201562, now seen corresponding path program 764 times [2021-06-05 22:02:27,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:27,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624553196] [2021-06-05 22:02:27,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:27,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:27,814 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:27,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:27,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624553196] [2021-06-05 22:02:27,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624553196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:27,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908946020] [2021-06-05 22:02:27,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 765 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 765 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:27,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:02:27,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:27,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:02:27,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:27,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:27,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:27,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:27,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:27,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:27,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:27,979 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:28,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:28,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:28,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:28,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:02:28,005 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:28,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:28,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:02:28,008 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:28,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:28,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:02:28,033 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 22:02:28,111 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:28,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908946020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:28,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:28,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:02:28,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285051056] [2021-06-05 22:02:28,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:02:28,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:28,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:02:28,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:02:28,111 INFO L87 Difference]: Start difference. First operand 242 states and 527 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:28,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:28,810 INFO L93 Difference]: Finished difference Result 283 states and 611 transitions. [2021-06-05 22:02:28,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:02:28,810 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:28,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:28,810 INFO L225 Difference]: With dead ends: 283 [2021-06-05 22:02:28,810 INFO L226 Difference]: Without dead ends: 274 [2021-06-05 22:02:28,810 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 829.3ms TimeCoverageRelationStatistics Valid=149, Invalid=1183, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:02:28,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-06-05 22:02:28,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 242. [2021-06-05 22:02:28,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.1867219917012446) internal successors, (527), 241 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:28,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 527 transitions. [2021-06-05 22:02:28,812 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 527 transitions. Word has length 20 [2021-06-05 22:02:28,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:28,812 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 527 transitions. [2021-06-05 22:02:28,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:28,812 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 527 transitions. [2021-06-05 22:02:28,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:28,813 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:28,813 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:29,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 765 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3682 [2021-06-05 22:02:29,013 INFO L430 AbstractCegarLoop]: === Iteration 771 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:29,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:29,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1690582558, now seen corresponding path program 765 times [2021-06-05 22:02:29,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:29,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105040586] [2021-06-05 22:02:29,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:29,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:29,246 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:29,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:29,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105040586] [2021-06-05 22:02:29,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105040586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:29,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122920804] [2021-06-05 22:02:29,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 766 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 766 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:29,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:02:29,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:29,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:29,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:29,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:29,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:29,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:29,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:29,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:29,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:29,476 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:29,540 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-06-05 22:02:29,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:29,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:29,544 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:29,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:29,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:29,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:02:29,576 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:29,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:29,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:29,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:29,601 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:29,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:29,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:02:29,624 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:02:29,707 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:29,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122920804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:29,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:29,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:02:29,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271022118] [2021-06-05 22:02:29,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:02:29,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:29,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:02:29,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:02:29,708 INFO L87 Difference]: Start difference. First operand 242 states and 527 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:30,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:30,478 INFO L93 Difference]: Finished difference Result 315 states and 662 transitions. [2021-06-05 22:02:30,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:02:30,478 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:30,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:30,478 INFO L225 Difference]: With dead ends: 315 [2021-06-05 22:02:30,478 INFO L226 Difference]: Without dead ends: 296 [2021-06-05 22:02:30,479 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 775.1ms TimeCoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:02:30,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-06-05 22:02:30,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 242. [2021-06-05 22:02:30,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.1867219917012446) internal successors, (527), 241 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:30,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 527 transitions. [2021-06-05 22:02:30,481 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 527 transitions. Word has length 20 [2021-06-05 22:02:30,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:30,481 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 527 transitions. [2021-06-05 22:02:30,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:30,481 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 527 transitions. [2021-06-05 22:02:30,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:30,481 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:30,481 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:30,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3685,766 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:30,681 INFO L430 AbstractCegarLoop]: === Iteration 772 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:30,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:30,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1586825382, now seen corresponding path program 766 times [2021-06-05 22:02:30,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:30,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751360090] [2021-06-05 22:02:30,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:30,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:30,842 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:30,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:30,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751360090] [2021-06-05 22:02:30,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751360090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:30,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550435302] [2021-06-05 22:02:30,843 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 767 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 767 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:30,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:02:30,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:30,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:30,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:31,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:31,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:31,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:02:31,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:31,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:31,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:02:31,042 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:31,064 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-06-05 22:02:31,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:31,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:02:31,068 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:31,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:31,075 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:02:31,075 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:02:31,116 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:31,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550435302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:31,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:31,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:02:31,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509838262] [2021-06-05 22:02:31,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:02:31,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:31,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:02:31,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:02:31,117 INFO L87 Difference]: Start difference. First operand 242 states and 527 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:31,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:31,396 INFO L93 Difference]: Finished difference Result 268 states and 570 transitions. [2021-06-05 22:02:31,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:02:31,397 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:31,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:31,397 INFO L225 Difference]: With dead ends: 268 [2021-06-05 22:02:31,397 INFO L226 Difference]: Without dead ends: 252 [2021-06-05 22:02:31,397 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 400.7ms TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:02:31,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-06-05 22:02:31,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 246. [2021-06-05 22:02:31,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.183673469387755) internal successors, (535), 245 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:31,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 535 transitions. [2021-06-05 22:02:31,399 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 535 transitions. Word has length 20 [2021-06-05 22:02:31,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:31,399 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 535 transitions. [2021-06-05 22:02:31,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:31,399 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 535 transitions. [2021-06-05 22:02:31,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:31,399 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:31,399 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:31,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 767 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3690 [2021-06-05 22:02:31,600 INFO L430 AbstractCegarLoop]: === Iteration 773 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:31,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:31,600 INFO L82 PathProgramCache]: Analyzing trace with hash -724820318, now seen corresponding path program 767 times [2021-06-05 22:02:31,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:31,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855147876] [2021-06-05 22:02:31,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:31,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:31,794 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:31,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:31,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855147876] [2021-06-05 22:02:31,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855147876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:31,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775121985] [2021-06-05 22:02:31,794 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 768 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 768 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:31,820 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:02:31,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:31,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:31,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:31,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:31,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:31,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:02:32,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:32,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:32,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:02:32,003 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:32,026 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-06-05 22:02:32,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:32,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:02:32,029 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:32,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:32,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:02:32,037 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:02:32,085 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:32,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775121985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:32,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:32,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:02:32,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54722549] [2021-06-05 22:02:32,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:02:32,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:32,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:02:32,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:02:32,086 INFO L87 Difference]: Start difference. First operand 246 states and 535 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:32,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:32,501 INFO L93 Difference]: Finished difference Result 273 states and 584 transitions. [2021-06-05 22:02:32,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:02:32,502 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:32,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:32,502 INFO L225 Difference]: With dead ends: 273 [2021-06-05 22:02:32,502 INFO L226 Difference]: Without dead ends: 260 [2021-06-05 22:02:32,502 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 586.3ms TimeCoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:02:32,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-06-05 22:02:32,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 247. [2021-06-05 22:02:32,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.182926829268293) internal successors, (537), 246 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:32,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 537 transitions. [2021-06-05 22:02:32,504 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 537 transitions. Word has length 20 [2021-06-05 22:02:32,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:32,504 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 537 transitions. [2021-06-05 22:02:32,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:32,504 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 537 transitions. [2021-06-05 22:02:32,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:32,504 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:32,504 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:32,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3691,768 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:32,705 INFO L430 AbstractCegarLoop]: === Iteration 774 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:32,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:32,705 INFO L82 PathProgramCache]: Analyzing trace with hash 411364954, now seen corresponding path program 768 times [2021-06-05 22:02:32,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:32,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953272621] [2021-06-05 22:02:32,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:32,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:32,946 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:32,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:32,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953272621] [2021-06-05 22:02:32,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953272621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:32,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605632007] [2021-06-05 22:02:32,946 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 769 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 769 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:32,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:02:32,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:32,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:02:32,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:33,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:33,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:33,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:33,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:33,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:33,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:33,127 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:33,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:33,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:33,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:33,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:33,152 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:33,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:33,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:02:33,155 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:33,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:33,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:02:33,176 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 22:02:33,252 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:33,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605632007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:33,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:33,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:02:33,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376612512] [2021-06-05 22:02:33,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:02:33,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:33,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:02:33,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:02:33,253 INFO L87 Difference]: Start difference. First operand 247 states and 537 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:33,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:33,630 INFO L93 Difference]: Finished difference Result 273 states and 587 transitions. [2021-06-05 22:02:33,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:02:33,630 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:33,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:33,630 INFO L225 Difference]: With dead ends: 273 [2021-06-05 22:02:33,630 INFO L226 Difference]: Without dead ends: 266 [2021-06-05 22:02:33,630 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 605.0ms TimeCoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:02:33,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-06-05 22:02:33,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 245. [2021-06-05 22:02:33,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.1844262295081966) internal successors, (533), 244 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:33,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 533 transitions. [2021-06-05 22:02:33,632 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 533 transitions. Word has length 20 [2021-06-05 22:02:33,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:33,632 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 533 transitions. [2021-06-05 22:02:33,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:33,632 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 533 transitions. [2021-06-05 22:02:33,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:33,633 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:33,633 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:33,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 769 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3692 [2021-06-05 22:02:33,833 INFO L430 AbstractCegarLoop]: === Iteration 775 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:33,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:33,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1463362858, now seen corresponding path program 769 times [2021-06-05 22:02:33,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:33,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403724923] [2021-06-05 22:02:33,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:33,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:33,997 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:33,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:33,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403724923] [2021-06-05 22:02:33,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403724923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:33,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423754778] [2021-06-05 22:02:33,998 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 770 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 770 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:34,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:34,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:34,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:34,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:34,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:34,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:02:34,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:34,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:34,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:02:34,186 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:34,208 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-06-05 22:02:34,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:34,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:02:34,211 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:34,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:34,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:02:34,219 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:02:34,253 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:34,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423754778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:34,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:34,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:02:34,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826259939] [2021-06-05 22:02:34,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:02:34,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:34,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:02:34,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:02:34,254 INFO L87 Difference]: Start difference. First operand 245 states and 533 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:34,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:34,544 INFO L93 Difference]: Finished difference Result 272 states and 575 transitions. [2021-06-05 22:02:34,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:02:34,544 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:34,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:34,544 INFO L225 Difference]: With dead ends: 272 [2021-06-05 22:02:34,544 INFO L226 Difference]: Without dead ends: 253 [2021-06-05 22:02:34,544 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 426.9ms TimeCoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:02:34,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-06-05 22:02:34,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 246. [2021-06-05 22:02:34,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.183673469387755) internal successors, (535), 245 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:34,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 535 transitions. [2021-06-05 22:02:34,546 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 535 transitions. Word has length 20 [2021-06-05 22:02:34,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:34,546 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 535 transitions. [2021-06-05 22:02:34,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:34,546 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 535 transitions. [2021-06-05 22:02:34,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:34,547 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:34,547 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:34,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3695,770 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:34,747 INFO L430 AbstractCegarLoop]: === Iteration 776 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:34,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:34,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1695419166, now seen corresponding path program 770 times [2021-06-05 22:02:34,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:34,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159776426] [2021-06-05 22:02:34,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:34,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:34,960 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:34,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:34,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159776426] [2021-06-05 22:02:34,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159776426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:34,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184448242] [2021-06-05 22:02:34,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 771 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 771 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:34,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:02:34,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:34,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:02:34,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:35,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:35,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:35,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:35,128 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:35,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:35,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:35,131 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:35,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:35,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:35,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:35,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:35,156 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:35,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:35,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:02:35,160 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:35,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:35,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:02:35,182 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 22:02:35,258 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:35,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184448242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:35,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:35,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:02:35,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287467798] [2021-06-05 22:02:35,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:02:35,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:35,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:02:35,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:02:35,259 INFO L87 Difference]: Start difference. First operand 246 states and 535 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:35,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:35,946 INFO L93 Difference]: Finished difference Result 294 states and 619 transitions. [2021-06-05 22:02:35,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:02:35,951 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:35,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:35,951 INFO L225 Difference]: With dead ends: 294 [2021-06-05 22:02:35,951 INFO L226 Difference]: Without dead ends: 278 [2021-06-05 22:02:35,951 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 798.9ms TimeCoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:02:35,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-06-05 22:02:35,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 245. [2021-06-05 22:02:35,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.1844262295081966) internal successors, (533), 244 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:35,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 533 transitions. [2021-06-05 22:02:35,953 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 533 transitions. Word has length 20 [2021-06-05 22:02:35,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:35,953 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 533 transitions. [2021-06-05 22:02:35,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:35,954 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 533 transitions. [2021-06-05 22:02:35,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:35,954 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:35,954 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:36,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3696,771 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:36,154 INFO L430 AbstractCegarLoop]: === Iteration 777 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:36,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:36,155 INFO L82 PathProgramCache]: Analyzing trace with hash 453377370, now seen corresponding path program 771 times [2021-06-05 22:02:36,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:36,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694202506] [2021-06-05 22:02:36,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:36,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:36,332 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:36,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:36,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694202506] [2021-06-05 22:02:36,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694202506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:36,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653768412] [2021-06-05 22:02:36,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 772 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 772 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:36,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:02:36,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:36,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:02:36,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:36,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:36,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:36,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:36,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:36,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:36,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:36,517 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:36,570 INFO L628 ElimStorePlain]: treesize reduction 89, result has 39.9 percent of original size [2021-06-05 22:02:36,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:36,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:36,573 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:36,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:36,591 INFO L518 ElimStorePlain]: Eliminatee v_prenex_626 vanished before elimination [2021-06-05 22:02:36,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:36,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:02:36,595 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:36,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:36,614 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:02:36,614 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:161, output treesize:30 [2021-06-05 22:02:36,699 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:36,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653768412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:36,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:36,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:02:36,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125139341] [2021-06-05 22:02:36,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:02:36,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:36,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:02:36,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:02:36,699 INFO L87 Difference]: Start difference. First operand 245 states and 533 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:37,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:37,172 INFO L93 Difference]: Finished difference Result 285 states and 610 transitions. [2021-06-05 22:02:37,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:02:37,172 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:37,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:37,173 INFO L225 Difference]: With dead ends: 285 [2021-06-05 22:02:37,173 INFO L226 Difference]: Without dead ends: 273 [2021-06-05 22:02:37,173 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 640.9ms TimeCoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:02:37,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-06-05 22:02:37,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 245. [2021-06-05 22:02:37,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.1844262295081966) internal successors, (533), 244 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:37,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 533 transitions. [2021-06-05 22:02:37,175 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 533 transitions. Word has length 20 [2021-06-05 22:02:37,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:37,175 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 533 transitions. [2021-06-05 22:02:37,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:37,175 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 533 transitions. [2021-06-05 22:02:37,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:37,175 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:37,175 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:37,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3699,772 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:37,376 INFO L430 AbstractCegarLoop]: === Iteration 778 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:37,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:37,376 INFO L82 PathProgramCache]: Analyzing trace with hash 577564578, now seen corresponding path program 772 times [2021-06-05 22:02:37,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:37,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172386633] [2021-06-05 22:02:37,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:37,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:37,552 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:37,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:37,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172386633] [2021-06-05 22:02:37,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172386633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:37,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322613594] [2021-06-05 22:02:37,552 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 773 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 773 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:37,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:02:37,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:37,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:37,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:37,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:37,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:37,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:02:37,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:37,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:37,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:02:37,754 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:37,777 INFO L628 ElimStorePlain]: treesize reduction 42, result has 44.0 percent of original size [2021-06-05 22:02:37,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:37,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:02:37,779 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:37,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:37,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:02:37,787 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:02:37,825 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:37,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322613594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:37,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:37,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:02:37,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329224004] [2021-06-05 22:02:37,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:02:37,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:37,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:02:37,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:02:37,826 INFO L87 Difference]: Start difference. First operand 245 states and 533 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:38,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:38,129 INFO L93 Difference]: Finished difference Result 267 states and 572 transitions. [2021-06-05 22:02:38,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:02:38,129 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:38,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:38,129 INFO L225 Difference]: With dead ends: 267 [2021-06-05 22:02:38,129 INFO L226 Difference]: Without dead ends: 254 [2021-06-05 22:02:38,129 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 411.8ms TimeCoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:02:38,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-06-05 22:02:38,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 248. [2021-06-05 22:02:38,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.182186234817814) internal successors, (539), 247 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:38,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 539 transitions. [2021-06-05 22:02:38,131 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 539 transitions. Word has length 20 [2021-06-05 22:02:38,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:38,131 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 539 transitions. [2021-06-05 22:02:38,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:38,131 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 539 transitions. [2021-06-05 22:02:38,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:38,132 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:38,132 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:38,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 773 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3704 [2021-06-05 22:02:38,332 INFO L430 AbstractCegarLoop]: === Iteration 779 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:38,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:38,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1713749850, now seen corresponding path program 773 times [2021-06-05 22:02:38,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:38,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853584264] [2021-06-05 22:02:38,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:38,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:38,526 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:38,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:38,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853584264] [2021-06-05 22:02:38,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853584264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:38,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084235020] [2021-06-05 22:02:38,526 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 774 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 774 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:38,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:02:38,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:38,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:38,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:38,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:38,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:38,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:38,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:38,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:38,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:38,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:38,697 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:38,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:38,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:38,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:38,702 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:38,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:38,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:38,705 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:38,762 INFO L628 ElimStorePlain]: treesize reduction 77, result has 45.4 percent of original size [2021-06-05 22:02:38,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:38,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:38,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:02:38,766 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:38,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:38,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:02:38,770 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:38,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:38,794 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:02:38,794 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 22:02:38,868 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:38,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084235020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:38,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:38,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:02:38,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959521209] [2021-06-05 22:02:38,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:02:38,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:38,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:02:38,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:02:38,869 INFO L87 Difference]: Start difference. First operand 248 states and 539 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:39,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:39,151 INFO L93 Difference]: Finished difference Result 286 states and 599 transitions. [2021-06-05 22:02:39,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:02:39,151 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:39,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:39,151 INFO L225 Difference]: With dead ends: 286 [2021-06-05 22:02:39,151 INFO L226 Difference]: Without dead ends: 267 [2021-06-05 22:02:39,151 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 482.6ms TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:02:39,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-06-05 22:02:39,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 247. [2021-06-05 22:02:39,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.182926829268293) internal successors, (537), 246 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:39,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 537 transitions. [2021-06-05 22:02:39,153 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 537 transitions. Word has length 20 [2021-06-05 22:02:39,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:39,153 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 537 transitions. [2021-06-05 22:02:39,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:39,153 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 537 transitions. [2021-06-05 22:02:39,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:39,154 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:39,154 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:39,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3705,774 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:39,354 INFO L430 AbstractCegarLoop]: === Iteration 780 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:39,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:39,354 INFO L82 PathProgramCache]: Analyzing trace with hash -432420910, now seen corresponding path program 774 times [2021-06-05 22:02:39,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:39,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747929947] [2021-06-05 22:02:39,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:39,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:39,549 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:39,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:39,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747929947] [2021-06-05 22:02:39,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747929947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:39,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933749772] [2021-06-05 22:02:39,549 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 775 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 775 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:39,576 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:02:39,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:39,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:02:39,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:39,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:39,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:39,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:39,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:39,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:39,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:39,713 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:39,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:39,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:39,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:39,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:39,741 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:39,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:39,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:39,749 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:39,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:39,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:02:39,770 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 22:02:39,842 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:39,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933749772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:39,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:39,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:02:39,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311917223] [2021-06-05 22:02:39,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:02:39,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:39,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:02:39,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:02:39,842 INFO L87 Difference]: Start difference. First operand 247 states and 537 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:40,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:40,324 INFO L93 Difference]: Finished difference Result 273 states and 590 transitions. [2021-06-05 22:02:40,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:02:40,324 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:40,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:40,324 INFO L225 Difference]: With dead ends: 273 [2021-06-05 22:02:40,324 INFO L226 Difference]: Without dead ends: 264 [2021-06-05 22:02:40,324 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 645.3ms TimeCoverageRelationStatistics Valid=136, Invalid=986, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:02:40,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-06-05 22:02:40,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 246. [2021-06-05 22:02:40,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.183673469387755) internal successors, (535), 245 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:40,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 535 transitions. [2021-06-05 22:02:40,326 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 535 transitions. Word has length 20 [2021-06-05 22:02:40,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:40,326 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 535 transitions. [2021-06-05 22:02:40,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:40,326 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 535 transitions. [2021-06-05 22:02:40,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:40,327 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:40,327 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:40,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 775 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3708 [2021-06-05 22:02:40,527 INFO L430 AbstractCegarLoop]: === Iteration 781 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:40,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:40,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1755762266, now seen corresponding path program 775 times [2021-06-05 22:02:40,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:40,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734202167] [2021-06-05 22:02:40,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:40,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:40,740 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:40,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:40,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734202167] [2021-06-05 22:02:40,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734202167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:40,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953655448] [2021-06-05 22:02:40,740 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 776 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 776 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:40,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:40,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:40,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:40,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:40,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:40,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:40,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:40,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:40,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:40,962 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:41,025 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-06-05 22:02:41,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:41,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:41,030 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:41,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:41,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:41,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:41,058 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:41,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:41,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:41,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:41,085 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:41,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:41,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:02:41,107 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:02:41,191 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:41,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953655448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:41,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:41,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:02:41,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747371812] [2021-06-05 22:02:41,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:02:41,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:41,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:02:41,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:02:41,191 INFO L87 Difference]: Start difference. First operand 246 states and 535 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:41,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:41,802 INFO L93 Difference]: Finished difference Result 304 states and 640 transitions. [2021-06-05 22:02:41,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:02:41,802 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:41,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:41,803 INFO L225 Difference]: With dead ends: 304 [2021-06-05 22:02:41,803 INFO L226 Difference]: Without dead ends: 285 [2021-06-05 22:02:41,803 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 774.0ms TimeCoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:02:41,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-06-05 22:02:41,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 245. [2021-06-05 22:02:41,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.1844262295081966) internal successors, (533), 244 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:41,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 533 transitions. [2021-06-05 22:02:41,805 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 533 transitions. Word has length 20 [2021-06-05 22:02:41,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:41,805 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 533 transitions. [2021-06-05 22:02:41,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:41,805 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 533 transitions. [2021-06-05 22:02:41,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:41,805 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:41,805 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:42,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 776 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3711 [2021-06-05 22:02:42,006 INFO L430 AbstractCegarLoop]: === Iteration 782 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:42,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:42,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1112378326, now seen corresponding path program 776 times [2021-06-05 22:02:42,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:42,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315422574] [2021-06-05 22:02:42,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:42,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:42,174 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:42,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:42,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315422574] [2021-06-05 22:02:42,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315422574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:42,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308629144] [2021-06-05 22:02:42,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 777 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 777 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:42,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:02:42,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:42,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:02:42,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:42,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:42,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:02:42,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:42,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:42,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:42,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:02:42,366 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:42,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:42,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:02:42,373 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-06-05 22:02:42,390 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:42,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308629144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:42,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:42,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 22:02:42,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693443783] [2021-06-05 22:02:42,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:02:42,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:42,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:02:42,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:02:42,391 INFO L87 Difference]: Start difference. First operand 245 states and 533 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:42,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:42,606 INFO L93 Difference]: Finished difference Result 269 states and 576 transitions. [2021-06-05 22:02:42,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:02:42,606 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:42,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:42,607 INFO L225 Difference]: With dead ends: 269 [2021-06-05 22:02:42,607 INFO L226 Difference]: Without dead ends: 262 [2021-06-05 22:02:42,607 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 348.7ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:02:42,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-05 22:02:42,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 249. [2021-06-05 22:02:42,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.185483870967742) internal successors, (542), 248 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:42,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 542 transitions. [2021-06-05 22:02:42,609 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 542 transitions. Word has length 20 [2021-06-05 22:02:42,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:42,609 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 542 transitions. [2021-06-05 22:02:42,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:42,609 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 542 transitions. [2021-06-05 22:02:42,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:42,609 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:42,609 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:42,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 777 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3716 [2021-06-05 22:02:42,809 INFO L430 AbstractCegarLoop]: === Iteration 783 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:42,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:42,810 INFO L82 PathProgramCache]: Analyzing trace with hash 23806946, now seen corresponding path program 777 times [2021-06-05 22:02:42,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:42,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654442067] [2021-06-05 22:02:42,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:42,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:42,966 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:42,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:42,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654442067] [2021-06-05 22:02:42,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654442067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:42,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355591863] [2021-06-05 22:02:42,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 778 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 778 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:42,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:02:42,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:42,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:02:42,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:43,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:43,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:43,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:43,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:43,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:43,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:43,122 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:43,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:43,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:43,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:43,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:43,149 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:43,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:43,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:43,152 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:43,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:43,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:02:43,174 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 22:02:43,261 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:43,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355591863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:43,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:43,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:02:43,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333952068] [2021-06-05 22:02:43,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:02:43,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:43,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:02:43,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:02:43,262 INFO L87 Difference]: Start difference. First operand 249 states and 542 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:43,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:43,536 INFO L93 Difference]: Finished difference Result 276 states and 592 transitions. [2021-06-05 22:02:43,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:02:43,536 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:43,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:43,536 INFO L225 Difference]: With dead ends: 276 [2021-06-05 22:02:43,536 INFO L226 Difference]: Without dead ends: 269 [2021-06-05 22:02:43,536 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 358.1ms TimeCoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:02:43,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-06-05 22:02:43,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 248. [2021-06-05 22:02:43,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.182186234817814) internal successors, (539), 247 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:43,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 539 transitions. [2021-06-05 22:02:43,538 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 539 transitions. Word has length 20 [2021-06-05 22:02:43,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:43,538 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 539 transitions. [2021-06-05 22:02:43,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:43,538 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 539 transitions. [2021-06-05 22:02:43,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:43,539 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:43,539 INFO L554 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:43,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3717,778 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:43,739 INFO L430 AbstractCegarLoop]: === Iteration 784 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:43,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:43,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1898432346, now seen corresponding path program 778 times [2021-06-05 22:02:43,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:43,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332985372] [2021-06-05 22:02:43,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:43,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:43,812 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:02:43,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:43,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332985372] [2021-06-05 22:02:43,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332985372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:43,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756562349] [2021-06-05 22:02:43,813 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 779 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 779 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:43,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:02:43,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:43,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:02:43,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:44,012 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:02:44,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756562349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:44,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:44,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:02:44,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801977922] [2021-06-05 22:02:44,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:02:44,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:44,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:02:44,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:02:44,013 INFO L87 Difference]: Start difference. First operand 248 states and 539 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:44,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:44,376 INFO L93 Difference]: Finished difference Result 297 states and 637 transitions. [2021-06-05 22:02:44,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:02:44,376 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:44,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:44,377 INFO L225 Difference]: With dead ends: 297 [2021-06-05 22:02:44,377 INFO L226 Difference]: Without dead ends: 297 [2021-06-05 22:02:44,377 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 414.7ms TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:02:44,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-06-05 22:02:44,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 248. [2021-06-05 22:02:44,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.182186234817814) internal successors, (539), 247 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:44,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 539 transitions. [2021-06-05 22:02:44,379 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 539 transitions. Word has length 20 [2021-06-05 22:02:44,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:44,379 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 539 transitions. [2021-06-05 22:02:44,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:44,379 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 539 transitions. [2021-06-05 22:02:44,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:44,379 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:44,379 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:44,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3722,779 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:44,579 INFO L430 AbstractCegarLoop]: === Iteration 785 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:44,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:44,580 INFO L82 PathProgramCache]: Analyzing trace with hash -2122363814, now seen corresponding path program 779 times [2021-06-05 22:02:44,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:44,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475341239] [2021-06-05 22:02:44,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:44,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:44,800 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:44,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:44,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475341239] [2021-06-05 22:02:44,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475341239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:44,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210793178] [2021-06-05 22:02:44,801 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 780 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 780 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:44,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:02:44,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:44,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:44,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:44,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:44,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:44,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:44,992 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:44,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:44,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:44,996 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:45,057 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-06-05 22:02:45,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:45,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:45,061 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:45,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:45,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:45,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:45,088 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:45,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:45,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:45,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:45,115 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:45,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:45,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:02:45,137 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:02:45,219 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:45,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210793178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:45,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:45,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:02:45,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843788845] [2021-06-05 22:02:45,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:02:45,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:45,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:02:45,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:02:45,220 INFO L87 Difference]: Start difference. First operand 248 states and 539 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:45,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:45,810 INFO L93 Difference]: Finished difference Result 303 states and 638 transitions. [2021-06-05 22:02:45,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:02:45,810 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:45,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:45,810 INFO L225 Difference]: With dead ends: 303 [2021-06-05 22:02:45,810 INFO L226 Difference]: Without dead ends: 284 [2021-06-05 22:02:45,810 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 752.7ms TimeCoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:02:45,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-06-05 22:02:45,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 247. [2021-06-05 22:02:45,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.182926829268293) internal successors, (537), 246 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:45,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 537 transitions. [2021-06-05 22:02:45,812 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 537 transitions. Word has length 20 [2021-06-05 22:02:45,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:45,812 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 537 transitions. [2021-06-05 22:02:45,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:45,812 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 537 transitions. [2021-06-05 22:02:45,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:45,813 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:45,813 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:46,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 780 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3734 [2021-06-05 22:02:46,013 INFO L430 AbstractCegarLoop]: === Iteration 786 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:46,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:46,013 INFO L82 PathProgramCache]: Analyzing trace with hash 65819362, now seen corresponding path program 780 times [2021-06-05 22:02:46,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:46,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083641259] [2021-06-05 22:02:46,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:46,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:46,245 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:46,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:46,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083641259] [2021-06-05 22:02:46,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083641259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:46,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576298745] [2021-06-05 22:02:46,246 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 781 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 781 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:46,272 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:02:46,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:46,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:02:46,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:46,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:46,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:46,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:46,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:46,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:46,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:46,492 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:46,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:46,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:46,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:46,516 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:46,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:46,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:46,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:46,544 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:46,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:46,568 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:02:46,568 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-06-05 22:02:46,665 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:46,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576298745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:46,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:46,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:02:46,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233282589] [2021-06-05 22:02:46,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:02:46,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:46,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:02:46,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:02:46,666 INFO L87 Difference]: Start difference. First operand 247 states and 537 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:47,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:47,185 INFO L93 Difference]: Finished difference Result 285 states and 606 transitions. [2021-06-05 22:02:47,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:02:47,185 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:47,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:47,185 INFO L225 Difference]: With dead ends: 285 [2021-06-05 22:02:47,185 INFO L226 Difference]: Without dead ends: 271 [2021-06-05 22:02:47,185 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 756.1ms TimeCoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:02:47,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-06-05 22:02:47,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 249. [2021-06-05 22:02:47,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.189516129032258) internal successors, (543), 248 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:47,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 543 transitions. [2021-06-05 22:02:47,187 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 543 transitions. Word has length 20 [2021-06-05 22:02:47,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:47,188 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 543 transitions. [2021-06-05 22:02:47,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:47,188 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 543 transitions. [2021-06-05 22:02:47,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:47,188 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:47,188 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:47,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 781 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3739 [2021-06-05 22:02:47,388 INFO L430 AbstractCegarLoop]: === Iteration 787 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:47,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:47,388 INFO L82 PathProgramCache]: Analyzing trace with hash -819978918, now seen corresponding path program 781 times [2021-06-05 22:02:47,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:47,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233718832] [2021-06-05 22:02:47,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:47,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:47,592 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:47,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:47,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233718832] [2021-06-05 22:02:47,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233718832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:47,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723696845] [2021-06-05 22:02:47,592 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 782 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 782 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:47,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:47,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:47,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:47,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:47,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:47,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:47,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:47,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:47,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:47,867 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:47,928 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-06-05 22:02:47,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:47,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:02:47,932 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:47,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:47,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:47,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:47,959 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:47,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:47,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:47,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:47,985 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:48,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:48,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:02:48,007 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:02:48,093 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:48,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723696845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:48,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:48,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:02:48,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809393224] [2021-06-05 22:02:48,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:02:48,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:48,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:02:48,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:02:48,094 INFO L87 Difference]: Start difference. First operand 249 states and 543 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:48,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:48,791 INFO L93 Difference]: Finished difference Result 311 states and 656 transitions. [2021-06-05 22:02:48,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:02:48,791 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:48,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:48,791 INFO L225 Difference]: With dead ends: 311 [2021-06-05 22:02:48,792 INFO L226 Difference]: Without dead ends: 292 [2021-06-05 22:02:48,792 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 780.2ms TimeCoverageRelationStatistics Valid=122, Invalid=1000, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:02:48,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-06-05 22:02:48,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 249. [2021-06-05 22:02:48,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.189516129032258) internal successors, (543), 248 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:48,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 543 transitions. [2021-06-05 22:02:48,794 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 543 transitions. Word has length 20 [2021-06-05 22:02:48,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:48,794 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 543 transitions. [2021-06-05 22:02:48,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:48,794 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 543 transitions. [2021-06-05 22:02:48,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:48,794 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:48,794 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:48,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3746,782 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:48,994 INFO L430 AbstractCegarLoop]: === Iteration 788 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:48,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:48,995 INFO L82 PathProgramCache]: Analyzing trace with hash -2124318238, now seen corresponding path program 782 times [2021-06-05 22:02:48,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:48,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895868639] [2021-06-05 22:02:48,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:48,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:49,181 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:49,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:49,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895868639] [2021-06-05 22:02:49,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895868639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:49,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636505826] [2021-06-05 22:02:49,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 783 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 783 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:49,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:02:49,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:49,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:02:49,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:49,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:49,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:02:49,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:49,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:49,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:49,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:02:49,392 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:49,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:49,398 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:02:49,398 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-06-05 22:02:49,437 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:49,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636505826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:49,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:49,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:02:49,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200320903] [2021-06-05 22:02:49,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:02:49,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:49,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:02:49,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:02:49,438 INFO L87 Difference]: Start difference. First operand 249 states and 543 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:49,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:49,727 INFO L93 Difference]: Finished difference Result 275 states and 589 transitions. [2021-06-05 22:02:49,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:02:49,728 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:49,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:49,728 INFO L225 Difference]: With dead ends: 275 [2021-06-05 22:02:49,728 INFO L226 Difference]: Without dead ends: 268 [2021-06-05 22:02:49,728 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 421.0ms TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:02:49,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-06-05 22:02:49,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 254. [2021-06-05 22:02:49,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 2.1897233201581026) internal successors, (554), 253 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:49,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 554 transitions. [2021-06-05 22:02:49,730 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 554 transitions. Word has length 20 [2021-06-05 22:02:49,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:49,730 INFO L482 AbstractCegarLoop]: Abstraction has 254 states and 554 transitions. [2021-06-05 22:02:49,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:49,730 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 554 transitions. [2021-06-05 22:02:49,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:49,730 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:49,730 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:49,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 783 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3751 [2021-06-05 22:02:49,931 INFO L430 AbstractCegarLoop]: === Iteration 789 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:49,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:49,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1262313174, now seen corresponding path program 783 times [2021-06-05 22:02:49,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:49,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62223297] [2021-06-05 22:02:49,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:49,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:50,107 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:50,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:50,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62223297] [2021-06-05 22:02:50,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62223297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:50,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393981803] [2021-06-05 22:02:50,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 784 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 784 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:50,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:02:50,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:50,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:02:50,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:50,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:50,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:50,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:50,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:50,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:50,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:50,311 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:50,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:50,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:50,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:50,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:02:50,334 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:50,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:50,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:02:50,337 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:50,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:50,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:02:50,356 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:29 [2021-06-05 22:02:50,413 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:50,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393981803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:50,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:50,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:02:50,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253669073] [2021-06-05 22:02:50,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:02:50,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:50,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:02:50,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:02:50,414 INFO L87 Difference]: Start difference. First operand 254 states and 554 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:50,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:50,972 INFO L93 Difference]: Finished difference Result 287 states and 612 transitions. [2021-06-05 22:02:50,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:02:50,973 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:50,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:50,973 INFO L225 Difference]: With dead ends: 287 [2021-06-05 22:02:50,973 INFO L226 Difference]: Without dead ends: 274 [2021-06-05 22:02:50,973 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 623.6ms TimeCoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:02:50,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-06-05 22:02:50,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 255. [2021-06-05 22:02:50,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.188976377952756) internal successors, (556), 254 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:50,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 556 transitions. [2021-06-05 22:02:50,975 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 556 transitions. Word has length 20 [2021-06-05 22:02:50,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:50,975 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 556 transitions. [2021-06-05 22:02:50,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:50,975 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 556 transitions. [2021-06-05 22:02:50,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:50,975 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:50,975 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:51,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3752,784 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:51,176 INFO L430 AbstractCegarLoop]: === Iteration 790 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:51,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:51,176 INFO L82 PathProgramCache]: Analyzing trace with hash -126127902, now seen corresponding path program 784 times [2021-06-05 22:02:51,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:51,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795335654] [2021-06-05 22:02:51,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:51,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:51,356 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:51,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:51,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795335654] [2021-06-05 22:02:51,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795335654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:51,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756713887] [2021-06-05 22:02:51,356 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 785 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 785 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:51,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:02:51,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:51,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:51,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:51,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:51,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:51,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:51,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:51,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:51,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:51,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:51,541 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:51,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:51,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:51,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:51,545 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:51,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:51,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:51,548 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:51,604 INFO L628 ElimStorePlain]: treesize reduction 77, result has 45.4 percent of original size [2021-06-05 22:02:51,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:51,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:51,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:02:51,608 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:51,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:51,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:02:51,611 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:51,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:51,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:02:51,635 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 22:02:51,712 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:51,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756713887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:51,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:51,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:02:51,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922296582] [2021-06-05 22:02:51,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:02:51,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:51,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:02:51,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:02:51,713 INFO L87 Difference]: Start difference. First operand 255 states and 556 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:52,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:52,152 INFO L93 Difference]: Finished difference Result 286 states and 608 transitions. [2021-06-05 22:02:52,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:02:52,152 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:52,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:52,152 INFO L225 Difference]: With dead ends: 286 [2021-06-05 22:02:52,152 INFO L226 Difference]: Without dead ends: 274 [2021-06-05 22:02:52,152 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 545.8ms TimeCoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:02:52,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-06-05 22:02:52,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 254. [2021-06-05 22:02:52,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 2.1897233201581026) internal successors, (554), 253 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:52,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 554 transitions. [2021-06-05 22:02:52,154 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 554 transitions. Word has length 20 [2021-06-05 22:02:52,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:52,155 INFO L482 AbstractCegarLoop]: Abstraction has 254 states and 554 transitions. [2021-06-05 22:02:52,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:52,155 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 554 transitions. [2021-06-05 22:02:52,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:52,155 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:52,155 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:52,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3755,785 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:52,355 INFO L430 AbstractCegarLoop]: === Iteration 791 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:52,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:52,355 INFO L82 PathProgramCache]: Analyzing trace with hash 925870002, now seen corresponding path program 785 times [2021-06-05 22:02:52,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:52,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309122783] [2021-06-05 22:02:52,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:52,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:52,549 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:52,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:52,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309122783] [2021-06-05 22:02:52,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309122783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:52,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934910463] [2021-06-05 22:02:52,550 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 786 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 786 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:52,576 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:02:52,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:52,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:52,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:52,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:52,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:52,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:02:52,747 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:52,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:52,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:02:52,750 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:52,773 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-06-05 22:02:52,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:52,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:02:52,784 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:52,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:52,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:02:52,793 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:02:52,831 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:52,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934910463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:52,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:52,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:02:52,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932646768] [2021-06-05 22:02:52,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:02:52,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:52,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:02:52,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:02:52,832 INFO L87 Difference]: Start difference. First operand 254 states and 554 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:53,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:53,147 INFO L93 Difference]: Finished difference Result 276 states and 593 transitions. [2021-06-05 22:02:53,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:02:53,148 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:53,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:53,148 INFO L225 Difference]: With dead ends: 276 [2021-06-05 22:02:53,148 INFO L226 Difference]: Without dead ends: 263 [2021-06-05 22:02:53,148 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 494.1ms TimeCoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:02:53,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-06-05 22:02:53,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 256. [2021-06-05 22:02:53,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.1882352941176473) internal successors, (558), 255 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:53,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 558 transitions. [2021-06-05 22:02:53,150 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 558 transitions. Word has length 20 [2021-06-05 22:02:53,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:53,150 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 558 transitions. [2021-06-05 22:02:53,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:53,150 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 558 transitions. [2021-06-05 22:02:53,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:53,150 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:53,151 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:53,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3758,786 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:53,351 INFO L430 AbstractCegarLoop]: === Iteration 792 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:53,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:53,351 INFO L82 PathProgramCache]: Analyzing trace with hash 2062055274, now seen corresponding path program 786 times [2021-06-05 22:02:53,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:53,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136524185] [2021-06-05 22:02:53,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:53,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:53,565 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:53,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:53,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136524185] [2021-06-05 22:02:53,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136524185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:53,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846035908] [2021-06-05 22:02:53,565 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 787 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 787 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:53,591 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:02:53,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:53,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:53,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:53,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:53,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:53,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:53,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:53,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:53,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:53,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:53,740 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:53,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:53,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:53,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:53,743 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:53,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:53,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:53,747 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:53,800 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-06-05 22:02:53,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:53,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:53,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:02:53,804 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:53,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:53,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:53,808 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:53,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:53,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:02:53,832 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 22:02:53,909 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:53,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846035908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:53,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:53,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:02:53,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015193932] [2021-06-05 22:02:53,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:02:53,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:53,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:02:53,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:02:53,909 INFO L87 Difference]: Start difference. First operand 256 states and 558 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:54,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:54,462 INFO L93 Difference]: Finished difference Result 296 states and 622 transitions. [2021-06-05 22:02:54,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:02:54,462 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:54,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:54,463 INFO L225 Difference]: With dead ends: 296 [2021-06-05 22:02:54,463 INFO L226 Difference]: Without dead ends: 277 [2021-06-05 22:02:54,463 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 675.0ms TimeCoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:02:54,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-06-05 22:02:54,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 255. [2021-06-05 22:02:54,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.188976377952756) internal successors, (556), 254 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:54,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 556 transitions. [2021-06-05 22:02:54,465 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 556 transitions. Word has length 20 [2021-06-05 22:02:54,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:54,465 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 556 transitions. [2021-06-05 22:02:54,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:54,465 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 556 transitions. [2021-06-05 22:02:54,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:54,465 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:54,465 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:54,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 787 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3759 [2021-06-05 22:02:54,666 INFO L430 AbstractCegarLoop]: === Iteration 793 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:54,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:54,666 INFO L82 PathProgramCache]: Analyzing trace with hash -84115486, now seen corresponding path program 787 times [2021-06-05 22:02:54,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:54,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905289441] [2021-06-05 22:02:54,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:54,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:54,845 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:54,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:54,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905289441] [2021-06-05 22:02:54,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905289441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:54,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292581014] [2021-06-05 22:02:54,845 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 788 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 788 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:54,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:54,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:54,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:55,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:55,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:55,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:55,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:55,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:55,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:55,031 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:55,093 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-06-05 22:02:55,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:55,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:55,098 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:55,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:55,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:55,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:55,125 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:55,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:55,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:55,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:55,151 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:55,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:55,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:02:55,173 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:02:55,253 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:55,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292581014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:55,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:55,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:02:55,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563564437] [2021-06-05 22:02:55,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:02:55,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:55,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:02:55,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:02:55,253 INFO L87 Difference]: Start difference. First operand 255 states and 556 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:55,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:55,614 INFO L93 Difference]: Finished difference Result 287 states and 618 transitions. [2021-06-05 22:02:55,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:02:55,615 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:55,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:55,615 INFO L225 Difference]: With dead ends: 287 [2021-06-05 22:02:55,615 INFO L226 Difference]: Without dead ends: 275 [2021-06-05 22:02:55,615 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 496.6ms TimeCoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:02:55,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-06-05 22:02:55,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 254. [2021-06-05 22:02:55,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 2.1897233201581026) internal successors, (554), 253 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:55,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 554 transitions. [2021-06-05 22:02:55,617 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 554 transitions. Word has length 20 [2021-06-05 22:02:55,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:55,617 INFO L482 AbstractCegarLoop]: Abstraction has 254 states and 554 transitions. [2021-06-05 22:02:55,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:55,617 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 554 transitions. [2021-06-05 22:02:55,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:55,618 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:55,618 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:55,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3762,788 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:55,818 INFO L430 AbstractCegarLoop]: === Iteration 794 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:55,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:55,818 INFO L82 PathProgramCache]: Analyzing trace with hash 40071722, now seen corresponding path program 788 times [2021-06-05 22:02:55,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:55,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563899939] [2021-06-05 22:02:55,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:55,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:55,988 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:55,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:55,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563899939] [2021-06-05 22:02:55,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563899939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:55,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183272460] [2021-06-05 22:02:55,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 789 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 789 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:56,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:02:56,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:56,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:02:56,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:56,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:56,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:02:56,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:56,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:56,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:56,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:02:56,183 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:56,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:56,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:02:56,190 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-06-05 22:02:56,207 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:56,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183272460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:56,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:56,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 22:02:56,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446909294] [2021-06-05 22:02:56,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:02:56,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:56,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:02:56,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:02:56,208 INFO L87 Difference]: Start difference. First operand 254 states and 554 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:56,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:56,440 INFO L93 Difference]: Finished difference Result 273 states and 587 transitions. [2021-06-05 22:02:56,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:02:56,440 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:56,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:56,440 INFO L225 Difference]: With dead ends: 273 [2021-06-05 22:02:56,440 INFO L226 Difference]: Without dead ends: 266 [2021-06-05 22:02:56,441 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 354.7ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:02:56,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-06-05 22:02:56,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 257. [2021-06-05 22:02:56,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 2.19140625) internal successors, (561), 256 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:56,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 561 transitions. [2021-06-05 22:02:56,442 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 561 transitions. Word has length 20 [2021-06-05 22:02:56,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:56,443 INFO L482 AbstractCegarLoop]: Abstraction has 257 states and 561 transitions. [2021-06-05 22:02:56,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:56,443 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 561 transitions. [2021-06-05 22:02:56,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:56,443 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:56,443 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:56,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3767,789 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:56,643 INFO L430 AbstractCegarLoop]: === Iteration 795 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:56,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:56,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1176256994, now seen corresponding path program 789 times [2021-06-05 22:02:56,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:56,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328710455] [2021-06-05 22:02:56,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:56,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:56,843 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:56,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:56,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328710455] [2021-06-05 22:02:56,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328710455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:56,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482414440] [2021-06-05 22:02:56,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 790 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 790 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:56,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:02:56,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:56,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:02:56,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:57,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:57,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:57,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:57,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:57,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:57,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:57,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:57,065 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:57,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:57,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:57,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:57,068 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:57,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:57,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:57,072 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:57,136 INFO L628 ElimStorePlain]: treesize reduction 71, result has 45.0 percent of original size [2021-06-05 22:02:57,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:57,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:57,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:02:57,141 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:57,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:57,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:02:57,145 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:57,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:57,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:02:57,170 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:161, output treesize:32 [2021-06-05 22:02:57,265 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:57,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482414440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:57,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:57,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:02:57,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685865123] [2021-06-05 22:02:57,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:02:57,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:57,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:02:57,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:02:57,266 INFO L87 Difference]: Start difference. First operand 257 states and 561 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:57,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:57,724 INFO L93 Difference]: Finished difference Result 302 states and 636 transitions. [2021-06-05 22:02:57,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:02:57,725 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:57,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:57,725 INFO L225 Difference]: With dead ends: 302 [2021-06-05 22:02:57,725 INFO L226 Difference]: Without dead ends: 286 [2021-06-05 22:02:57,725 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 557.9ms TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:02:57,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-06-05 22:02:57,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 256. [2021-06-05 22:02:57,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.1882352941176473) internal successors, (558), 255 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:57,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 558 transitions. [2021-06-05 22:02:57,727 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 558 transitions. Word has length 20 [2021-06-05 22:02:57,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:57,727 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 558 transitions. [2021-06-05 22:02:57,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:57,727 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 558 transitions. [2021-06-05 22:02:57,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:57,728 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:57,728 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:57,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 790 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3768 [2021-06-05 22:02:57,928 INFO L430 AbstractCegarLoop]: === Iteration 796 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:57,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:57,928 INFO L82 PathProgramCache]: Analyzing trace with hash -969913766, now seen corresponding path program 790 times [2021-06-05 22:02:57,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:57,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491878653] [2021-06-05 22:02:57,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:57,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:58,157 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:58,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:58,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491878653] [2021-06-05 22:02:58,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491878653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:58,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874144796] [2021-06-05 22:02:58,158 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 791 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 791 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:58,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:02:58,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:58,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:58,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:58,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:58,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:58,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:58,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:58,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:58,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:58,377 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:58,449 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-06-05 22:02:58,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:58,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:02:58,454 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:58,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:58,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:58,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:58,487 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:58,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:58,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:58,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:02:58,519 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:02:58,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:58,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:02:58,545 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:02:58,640 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:58,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874144796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:58,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:02:58,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:02:58,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381279889] [2021-06-05 22:02:58,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:02:58,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:02:58,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:02:58,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:02:58,641 INFO L87 Difference]: Start difference. First operand 256 states and 558 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:59,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:02:59,187 INFO L93 Difference]: Finished difference Result 306 states and 647 transitions. [2021-06-05 22:02:59,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:02:59,187 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:02:59,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:02:59,188 INFO L225 Difference]: With dead ends: 306 [2021-06-05 22:02:59,188 INFO L226 Difference]: Without dead ends: 287 [2021-06-05 22:02:59,188 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 793.2ms TimeCoverageRelationStatistics Valid=142, Invalid=1048, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:02:59,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-06-05 22:02:59,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 256. [2021-06-05 22:02:59,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.1882352941176473) internal successors, (558), 255 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:59,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 558 transitions. [2021-06-05 22:02:59,190 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 558 transitions. Word has length 20 [2021-06-05 22:02:59,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:02:59,190 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 558 transitions. [2021-06-05 22:02:59,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:02:59,190 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 558 transitions. [2021-06-05 22:02:59,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:02:59,190 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:02:59,191 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:02:59,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3772,791 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:59,391 INFO L430 AbstractCegarLoop]: === Iteration 797 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:02:59,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:02:59,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1218269410, now seen corresponding path program 791 times [2021-06-05 22:02:59,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:02:59,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474415555] [2021-06-05 22:02:59,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:02:59,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:02:59,639 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:02:59,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:02:59,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474415555] [2021-06-05 22:02:59,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474415555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:02:59,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195164198] [2021-06-05 22:02:59,639 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 792 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 792 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:02:59,666 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:02:59,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:02:59,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:02:59,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:02:59,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:59,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:59,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:59,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:59,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:59,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:59,889 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:59,960 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-06-05 22:02:59,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:59,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:02:59,964 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:02:59,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:02:59,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:02:59,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:02:59,993 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:00,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:00,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:00,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:03:00,022 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:00,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:00,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:03:00,047 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:03:00,138 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:00,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195164198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:00,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:00,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:03:00,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358667961] [2021-06-05 22:03:00,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:03:00,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:00,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:03:00,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:03:00,138 INFO L87 Difference]: Start difference. First operand 256 states and 558 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:00,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:00,900 INFO L93 Difference]: Finished difference Result 311 states and 657 transitions. [2021-06-05 22:03:00,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:03:00,901 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:00,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:00,901 INFO L225 Difference]: With dead ends: 311 [2021-06-05 22:03:00,901 INFO L226 Difference]: Without dead ends: 292 [2021-06-05 22:03:00,901 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 921.3ms TimeCoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:03:00,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-06-05 22:03:00,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 256. [2021-06-05 22:03:00,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.1882352941176473) internal successors, (558), 255 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:00,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 558 transitions. [2021-06-05 22:03:00,903 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 558 transitions. Word has length 20 [2021-06-05 22:03:00,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:00,903 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 558 transitions. [2021-06-05 22:03:00,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:00,903 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 558 transitions. [2021-06-05 22:03:00,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:00,904 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:00,904 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:01,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3777,792 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:01,104 INFO L430 AbstractCegarLoop]: === Iteration 798 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:01,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:01,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1649871182, now seen corresponding path program 792 times [2021-06-05 22:03:01,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:01,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613142945] [2021-06-05 22:03:01,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:01,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:01,279 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:01,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:01,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613142945] [2021-06-05 22:03:01,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613142945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:01,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360055475] [2021-06-05 22:03:01,280 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 793 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 793 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:01,307 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:03:01,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:01,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:03:01,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:01,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:01,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:01,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:01,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:01,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:01,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:01,490 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:01,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:01,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:01,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:01,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:03:01,516 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:01,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:01,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:03:01,520 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:01,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:01,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:03:01,542 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:29 [2021-06-05 22:03:01,603 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:01,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360055475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:01,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:01,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:03:01,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004962925] [2021-06-05 22:03:01,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:03:01,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:01,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:03:01,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:03:01,604 INFO L87 Difference]: Start difference. First operand 256 states and 558 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:02,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:02,003 INFO L93 Difference]: Finished difference Result 279 states and 599 transitions. [2021-06-05 22:03:02,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:03:02,003 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:02,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:02,003 INFO L225 Difference]: With dead ends: 279 [2021-06-05 22:03:02,003 INFO L226 Difference]: Without dead ends: 266 [2021-06-05 22:03:02,003 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 494.4ms TimeCoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:03:02,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-06-05 22:03:02,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 260. [2021-06-05 22:03:02,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 2.1853281853281854) internal successors, (566), 259 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:02,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 566 transitions. [2021-06-05 22:03:02,005 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 566 transitions. Word has length 20 [2021-06-05 22:03:02,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:02,005 INFO L482 AbstractCegarLoop]: Abstraction has 260 states and 566 transitions. [2021-06-05 22:03:02,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:02,006 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 566 transitions. [2021-06-05 22:03:02,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:02,006 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:02,006 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:02,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 793 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3782 [2021-06-05 22:03:02,206 INFO L430 AbstractCegarLoop]: === Iteration 799 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:02,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:02,206 INFO L82 PathProgramCache]: Analyzing trace with hash -513685910, now seen corresponding path program 793 times [2021-06-05 22:03:02,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:02,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013612493] [2021-06-05 22:03:02,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:02,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:02,474 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:02,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:02,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013612493] [2021-06-05 22:03:02,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013612493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:02,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960560417] [2021-06-05 22:03:02,474 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 794 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 794 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:02,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:02,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:03:02,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:02,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:02,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:02,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:02,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:02,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:02,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:02,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:02,671 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:02,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:02,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:02,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:02,675 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:02,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:02,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:02,679 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:02,745 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-06-05 22:03:02,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:02,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:02,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:03:02,750 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:02,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:02,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:03:02,754 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:02,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:02,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:03:02,783 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 22:03:02,872 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:02,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960560417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:02,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:02,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:03:02,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528709904] [2021-06-05 22:03:02,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:03:02,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:02,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:03:02,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:03:02,873 INFO L87 Difference]: Start difference. First operand 260 states and 566 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:03,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:03,291 INFO L93 Difference]: Finished difference Result 299 states and 628 transitions. [2021-06-05 22:03:03,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:03:03,291 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:03,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:03,291 INFO L225 Difference]: With dead ends: 299 [2021-06-05 22:03:03,291 INFO L226 Difference]: Without dead ends: 280 [2021-06-05 22:03:03,291 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 587.7ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:03:03,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-06-05 22:03:03,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 259. [2021-06-05 22:03:03,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.186046511627907) internal successors, (564), 258 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:03,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 564 transitions. [2021-06-05 22:03:03,293 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 564 transitions. Word has length 20 [2021-06-05 22:03:03,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:03,293 INFO L482 AbstractCegarLoop]: Abstraction has 259 states and 564 transitions. [2021-06-05 22:03:03,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:03,294 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 564 transitions. [2021-06-05 22:03:03,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:03,294 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:03,294 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:03,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3785,794 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:03,494 INFO L430 AbstractCegarLoop]: === Iteration 800 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:03,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:03,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1635110626, now seen corresponding path program 794 times [2021-06-05 22:03:03,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:03,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834645589] [2021-06-05 22:03:03,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:03,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:03,680 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:03,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:03,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834645589] [2021-06-05 22:03:03,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834645589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:03,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979113848] [2021-06-05 22:03:03,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 795 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 795 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:03,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:03:03,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:03,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:03:03,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:03,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:03,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:03,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:03,856 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:03,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:03,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:03,859 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:03,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:03,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:03,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:03,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:03:03,889 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:03,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:03,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:03:03,893 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:03,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:03,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:03:03,917 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 22:03:04,003 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:04,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979113848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:04,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:04,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:03:04,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944990542] [2021-06-05 22:03:04,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:03:04,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:04,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:03:04,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:03:04,004 INFO L87 Difference]: Start difference. First operand 259 states and 564 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:04,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:04,239 INFO L93 Difference]: Finished difference Result 278 states and 600 transitions. [2021-06-05 22:03:04,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:03:04,240 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:04,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:04,240 INFO L225 Difference]: With dead ends: 278 [2021-06-05 22:03:04,240 INFO L226 Difference]: Without dead ends: 271 [2021-06-05 22:03:04,240 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 441.3ms TimeCoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:03:04,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-06-05 22:03:04,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 259. [2021-06-05 22:03:04,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.186046511627907) internal successors, (564), 258 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:04,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 564 transitions. [2021-06-05 22:03:04,242 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 564 transitions. Word has length 20 [2021-06-05 22:03:04,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:04,242 INFO L482 AbstractCegarLoop]: Abstraction has 259 states and 564 transitions. [2021-06-05 22:03:04,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:04,242 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 564 transitions. [2021-06-05 22:03:04,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:04,242 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:04,242 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:04,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3788,795 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:04,443 INFO L430 AbstractCegarLoop]: === Iteration 801 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:04,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:04,443 INFO L82 PathProgramCache]: Analyzing trace with hash -471673494, now seen corresponding path program 795 times [2021-06-05 22:03:04,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:04,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657683729] [2021-06-05 22:03:04,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:04,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:04,665 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:04,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:04,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657683729] [2021-06-05 22:03:04,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657683729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:04,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129506704] [2021-06-05 22:03:04,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 796 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 796 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:04,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:03:04,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:04,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:03:04,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:04,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:04,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:04,884 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:04,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:04,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:04,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:03:04,909 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:04,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:04,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:04,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:04,933 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:04,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:04,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:04,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:03:04,959 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:04,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:04,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:03:04,981 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-06-05 22:03:05,080 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:05,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129506704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:05,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:05,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:03:05,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087609249] [2021-06-05 22:03:05,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:03:05,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:05,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:03:05,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:03:05,081 INFO L87 Difference]: Start difference. First operand 259 states and 564 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:05,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:05,651 INFO L93 Difference]: Finished difference Result 290 states and 619 transitions. [2021-06-05 22:03:05,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:03:05,652 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:05,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:05,652 INFO L225 Difference]: With dead ends: 290 [2021-06-05 22:03:05,652 INFO L226 Difference]: Without dead ends: 276 [2021-06-05 22:03:05,652 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 728.2ms TimeCoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:03:05,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-06-05 22:03:05,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 259. [2021-06-05 22:03:05,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.186046511627907) internal successors, (564), 258 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:05,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 564 transitions. [2021-06-05 22:03:05,654 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 564 transitions. Word has length 20 [2021-06-05 22:03:05,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:05,654 INFO L482 AbstractCegarLoop]: Abstraction has 259 states and 564 transitions. [2021-06-05 22:03:05,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:05,654 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 564 transitions. [2021-06-05 22:03:05,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:05,655 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:05,655 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:05,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 796 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3791 [2021-06-05 22:03:05,855 INFO L430 AbstractCegarLoop]: === Iteration 802 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:05,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:05,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1357471774, now seen corresponding path program 796 times [2021-06-05 22:03:05,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:05,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650801245] [2021-06-05 22:03:05,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:05,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:06,083 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:06,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:06,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650801245] [2021-06-05 22:03:06,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650801245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:06,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349182952] [2021-06-05 22:03:06,083 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 797 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 797 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:06,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:03:06,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:06,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:03:06,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:06,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:06,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:06,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:06,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:06,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:06,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:06,375 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:06,448 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-06-05 22:03:06,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:06,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:03:06,453 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:06,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:06,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:06,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:06,489 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:06,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:06,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:06,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:03:06,518 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:06,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:06,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:03:06,542 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:03:06,636 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:06,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349182952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:06,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:06,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:03:06,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478216585] [2021-06-05 22:03:06,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:03:06,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:06,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:03:06,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:03:06,636 INFO L87 Difference]: Start difference. First operand 259 states and 564 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:07,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:07,327 INFO L93 Difference]: Finished difference Result 317 states and 669 transitions. [2021-06-05 22:03:07,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:03:07,328 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:07,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:07,328 INFO L225 Difference]: With dead ends: 317 [2021-06-05 22:03:07,328 INFO L226 Difference]: Without dead ends: 298 [2021-06-05 22:03:07,328 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 795.5ms TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:03:07,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-06-05 22:03:07,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 259. [2021-06-05 22:03:07,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.186046511627907) internal successors, (564), 258 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:07,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 564 transitions. [2021-06-05 22:03:07,330 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 564 transitions. Word has length 20 [2021-06-05 22:03:07,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:07,330 INFO L482 AbstractCegarLoop]: Abstraction has 259 states and 564 transitions. [2021-06-05 22:03:07,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:07,330 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 564 transitions. [2021-06-05 22:03:07,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:07,331 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:07,331 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:07,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 797 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3798 [2021-06-05 22:03:07,531 INFO L430 AbstractCegarLoop]: === Iteration 803 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:07,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:07,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1796473642, now seen corresponding path program 797 times [2021-06-05 22:03:07,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:07,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085173459] [2021-06-05 22:03:07,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:07,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:07,730 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:07,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:07,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085173459] [2021-06-05 22:03:07,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085173459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:07,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780928226] [2021-06-05 22:03:07,731 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 798 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 798 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:07,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:03:07,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:07,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:03:07,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:07,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:07,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:07,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:03:07,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:07,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:07,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:03:07,931 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:07,953 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-06-05 22:03:07,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:07,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:03:07,957 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:07,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:07,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:03:07,964 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:03:08,001 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:08,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780928226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:08,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:08,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:03:08,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187735961] [2021-06-05 22:03:08,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:03:08,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:08,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:03:08,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:03:08,002 INFO L87 Difference]: Start difference. First operand 259 states and 564 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:08,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:08,265 INFO L93 Difference]: Finished difference Result 283 states and 607 transitions. [2021-06-05 22:03:08,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:03:08,265 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:08,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:08,265 INFO L225 Difference]: With dead ends: 283 [2021-06-05 22:03:08,266 INFO L226 Difference]: Without dead ends: 270 [2021-06-05 22:03:08,266 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 432.4ms TimeCoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:03:08,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-06-05 22:03:08,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 264. [2021-06-05 22:03:08,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.182509505703422) internal successors, (574), 263 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:08,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 574 transitions. [2021-06-05 22:03:08,267 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 574 transitions. Word has length 20 [2021-06-05 22:03:08,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:08,268 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 574 transitions. [2021-06-05 22:03:08,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:08,268 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 574 transitions. [2021-06-05 22:03:08,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:08,268 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:08,268 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:08,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3803,798 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:08,468 INFO L430 AbstractCegarLoop]: === Iteration 804 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:08,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:08,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1362308382, now seen corresponding path program 798 times [2021-06-05 22:03:08,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:08,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761594006] [2021-06-05 22:03:08,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:08,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:08,696 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:08,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:08,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761594006] [2021-06-05 22:03:08,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761594006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:08,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959951688] [2021-06-05 22:03:08,697 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 799 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 799 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:08,723 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:03:08,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:08,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:03:08,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:08,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:08,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:08,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:08,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:08,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:08,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:08,861 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:08,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:08,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:08,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:08,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:03:08,887 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:08,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:08,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:03:08,890 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:08,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:08,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:03:08,911 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 22:03:09,004 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:09,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959951688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:09,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:09,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:03:09,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436041606] [2021-06-05 22:03:09,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:03:09,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:09,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:03:09,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:03:09,005 INFO L87 Difference]: Start difference. First operand 264 states and 574 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:09,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:09,292 INFO L93 Difference]: Finished difference Result 281 states and 606 transitions. [2021-06-05 22:03:09,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:03:09,292 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:09,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:09,292 INFO L225 Difference]: With dead ends: 281 [2021-06-05 22:03:09,292 INFO L226 Difference]: Without dead ends: 274 [2021-06-05 22:03:09,292 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 492.2ms TimeCoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:03:09,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-06-05 22:03:09,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 263. [2021-06-05 22:03:09,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.183206106870229) internal successors, (572), 262 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:09,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 572 transitions. [2021-06-05 22:03:09,294 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 572 transitions. Word has length 20 [2021-06-05 22:03:09,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:09,294 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 572 transitions. [2021-06-05 22:03:09,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:09,295 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 572 transitions. [2021-06-05 22:03:09,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:09,295 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:09,295 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:09,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 799 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3804 [2021-06-05 22:03:09,495 INFO L430 AbstractCegarLoop]: === Iteration 805 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:09,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:09,495 INFO L82 PathProgramCache]: Analyzing trace with hash 786488154, now seen corresponding path program 799 times [2021-06-05 22:03:09,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:09,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814624560] [2021-06-05 22:03:09,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:09,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:09,724 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:09,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:09,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814624560] [2021-06-05 22:03:09,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814624560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:09,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993459389] [2021-06-05 22:03:09,725 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 800 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 800 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:09,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:09,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:03:09,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:09,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:09,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:09,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:09,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:09,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:09,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:09,948 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:10,012 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-06-05 22:03:10,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:10,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:10,015 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:10,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:10,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:10,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:03:10,042 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:10,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:10,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:10,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:03:10,068 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:10,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:10,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:03:10,090 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:03:10,173 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:10,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993459389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:10,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:10,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:03:10,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621350212] [2021-06-05 22:03:10,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:03:10,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:10,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:03:10,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:03:10,174 INFO L87 Difference]: Start difference. First operand 263 states and 572 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:10,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:10,634 INFO L93 Difference]: Finished difference Result 311 states and 657 transitions. [2021-06-05 22:03:10,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:03:10,634 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:10,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:10,635 INFO L225 Difference]: With dead ends: 311 [2021-06-05 22:03:10,635 INFO L226 Difference]: Without dead ends: 292 [2021-06-05 22:03:10,635 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 669.3ms TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:03:10,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-06-05 22:03:10,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 262. [2021-06-05 22:03:10,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.1839080459770117) internal successors, (570), 261 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:10,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 570 transitions. [2021-06-05 22:03:10,637 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 570 transitions. Word has length 20 [2021-06-05 22:03:10,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:10,637 INFO L482 AbstractCegarLoop]: Abstraction has 262 states and 570 transitions. [2021-06-05 22:03:10,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:10,637 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 570 transitions. [2021-06-05 22:03:10,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:10,637 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:10,637 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:10,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3809,800 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:10,838 INFO L430 AbstractCegarLoop]: === Iteration 806 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:10,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:10,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1320295966, now seen corresponding path program 800 times [2021-06-05 22:03:10,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:10,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948299047] [2021-06-05 22:03:10,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:10,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:11,061 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:11,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:11,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948299047] [2021-06-05 22:03:11,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948299047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:11,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955687796] [2021-06-05 22:03:11,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 801 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 801 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:11,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:03:11,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:11,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:03:11,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:11,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:11,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:11,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:11,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:11,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:11,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:11,242 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:11,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:11,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:11,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:11,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:03:11,267 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:11,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:11,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:03:11,270 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:11,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:11,292 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:03:11,292 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 22:03:11,378 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:11,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955687796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:11,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:11,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:03:11,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296423778] [2021-06-05 22:03:11,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:03:11,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:11,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:03:11,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:03:11,379 INFO L87 Difference]: Start difference. First operand 262 states and 570 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:12,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:12,324 INFO L93 Difference]: Finished difference Result 354 states and 733 transitions. [2021-06-05 22:03:12,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:03:12,325 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:12,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:12,325 INFO L225 Difference]: With dead ends: 354 [2021-06-05 22:03:12,325 INFO L226 Difference]: Without dead ends: 324 [2021-06-05 22:03:12,325 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1038.5ms TimeCoverageRelationStatistics Valid=149, Invalid=1257, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:03:12,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-06-05 22:03:12,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 265. [2021-06-05 22:03:12,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.1931818181818183) internal successors, (579), 264 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:12,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 579 transitions. [2021-06-05 22:03:12,327 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 579 transitions. Word has length 20 [2021-06-05 22:03:12,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:12,328 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 579 transitions. [2021-06-05 22:03:12,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:12,328 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 579 transitions. [2021-06-05 22:03:12,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:12,328 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:12,328 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:12,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 801 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3814 [2021-06-05 22:03:12,528 INFO L430 AbstractCegarLoop]: === Iteration 807 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:12,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:12,528 INFO L82 PathProgramCache]: Analyzing trace with hash 2088873050, now seen corresponding path program 801 times [2021-06-05 22:03:12,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:12,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727264152] [2021-06-05 22:03:12,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:12,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:12,772 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:12,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:12,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727264152] [2021-06-05 22:03:12,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727264152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:12,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487957624] [2021-06-05 22:03:12,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 802 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 802 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:12,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:03:12,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:12,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:03:12,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:13,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:13,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:13,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:13,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:13,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:13,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:13,032 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:13,093 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-06-05 22:03:13,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:13,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:03:13,097 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:13,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:13,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:13,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:13,124 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:13,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:13,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:13,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:03:13,149 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:13,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:13,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:03:13,171 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:03:13,269 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:13,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487957624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:13,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:13,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:03:13,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092666478] [2021-06-05 22:03:13,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:03:13,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:13,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:03:13,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:03:13,270 INFO L87 Difference]: Start difference. First operand 265 states and 579 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:14,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:14,307 INFO L93 Difference]: Finished difference Result 383 states and 786 transitions. [2021-06-05 22:03:14,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:03:14,307 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:14,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:14,307 INFO L225 Difference]: With dead ends: 383 [2021-06-05 22:03:14,307 INFO L226 Difference]: Without dead ends: 343 [2021-06-05 22:03:14,308 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1210.8ms TimeCoverageRelationStatistics Valid=166, Invalid=1240, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:03:14,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-06-05 22:03:14,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 265. [2021-06-05 22:03:14,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.1931818181818183) internal successors, (579), 264 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:14,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 579 transitions. [2021-06-05 22:03:14,310 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 579 transitions. Word has length 20 [2021-06-05 22:03:14,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:14,310 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 579 transitions. [2021-06-05 22:03:14,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:14,310 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 579 transitions. [2021-06-05 22:03:14,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:14,310 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:14,310 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:14,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3817,802 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:14,511 INFO L430 AbstractCegarLoop]: === Iteration 808 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:14,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:14,511 INFO L82 PathProgramCache]: Analyzing trace with hash 398930146, now seen corresponding path program 802 times [2021-06-05 22:03:14,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:14,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230399112] [2021-06-05 22:03:14,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:14,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:14,760 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:14,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:14,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230399112] [2021-06-05 22:03:14,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230399112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:14,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040119083] [2021-06-05 22:03:14,760 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 803 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 803 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:14,786 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:03:14,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:14,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:03:14,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:15,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:15,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:15,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:15,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:15,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:15,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:15,056 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:15,118 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-06-05 22:03:15,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:15,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:03:15,122 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:15,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:15,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:15,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:15,149 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:15,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:15,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:15,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:03:15,175 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:15,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:15,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:03:15,197 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:03:15,281 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:15,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040119083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:15,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:15,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:03:15,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949441506] [2021-06-05 22:03:15,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:03:15,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:15,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:03:15,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:03:15,282 INFO L87 Difference]: Start difference. First operand 265 states and 579 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:15,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:15,800 INFO L93 Difference]: Finished difference Result 323 states and 684 transitions. [2021-06-05 22:03:15,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:03:15,801 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:15,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:15,801 INFO L225 Difference]: With dead ends: 323 [2021-06-05 22:03:15,801 INFO L226 Difference]: Without dead ends: 304 [2021-06-05 22:03:15,801 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 713.1ms TimeCoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:03:15,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-06-05 22:03:15,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 266. [2021-06-05 22:03:15,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.1962264150943396) internal successors, (582), 265 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:15,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 582 transitions. [2021-06-05 22:03:15,803 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 582 transitions. Word has length 20 [2021-06-05 22:03:15,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:15,803 INFO L482 AbstractCegarLoop]: Abstraction has 266 states and 582 transitions. [2021-06-05 22:03:15,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:15,803 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 582 transitions. [2021-06-05 22:03:15,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:15,804 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:15,804 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:16,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 803 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3822 [2021-06-05 22:03:16,004 INFO L430 AbstractCegarLoop]: === Iteration 809 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:16,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:16,004 INFO L82 PathProgramCache]: Analyzing trace with hash -816653578, now seen corresponding path program 803 times [2021-06-05 22:03:16,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:16,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95020500] [2021-06-05 22:03:16,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:16,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:16,204 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:16,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:16,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95020500] [2021-06-05 22:03:16,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95020500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:16,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005998682] [2021-06-05 22:03:16,205 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 804 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 804 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:16,231 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:03:16,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:16,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:03:16,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:16,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:16,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:16,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:03:16,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:16,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:16,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:03:16,409 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:16,431 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-06-05 22:03:16,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:16,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:03:16,434 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:16,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:16,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:03:16,441 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:03:16,481 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:16,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005998682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:16,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:16,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 22:03:16,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079944356] [2021-06-05 22:03:16,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:03:16,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:16,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:03:16,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:03:16,482 INFO L87 Difference]: Start difference. First operand 266 states and 582 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:16,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:16,938 INFO L93 Difference]: Finished difference Result 308 states and 649 transitions. [2021-06-05 22:03:16,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:03:16,939 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:16,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:16,939 INFO L225 Difference]: With dead ends: 308 [2021-06-05 22:03:16,939 INFO L226 Difference]: Without dead ends: 277 [2021-06-05 22:03:16,939 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 461.2ms TimeCoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:03:16,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-06-05 22:03:16,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 268. [2021-06-05 22:03:16,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.194756554307116) internal successors, (586), 267 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:16,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 586 transitions. [2021-06-05 22:03:16,941 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 586 transitions. Word has length 20 [2021-06-05 22:03:16,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:16,941 INFO L482 AbstractCegarLoop]: Abstraction has 268 states and 586 transitions. [2021-06-05 22:03:16,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:16,941 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 586 transitions. [2021-06-05 22:03:16,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:16,942 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:16,942 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:17,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 804 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3827 [2021-06-05 22:03:17,144 INFO L430 AbstractCegarLoop]: === Iteration 810 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:17,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:17,145 INFO L82 PathProgramCache]: Analyzing trace with hash 135699630, now seen corresponding path program 804 times [2021-06-05 22:03:17,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:17,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645232119] [2021-06-05 22:03:17,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:17,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:17,398 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:17,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:17,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645232119] [2021-06-05 22:03:17,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645232119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:17,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936792226] [2021-06-05 22:03:17,398 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 805 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 805 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:17,424 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:03:17,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:17,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:03:17,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:17,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:17,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:17,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:17,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:17,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:17,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:17,585 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:17,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:17,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:17,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:17,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:03:17,608 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:17,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:17,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:03:17,611 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:17,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:17,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:03:17,629 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:29 [2021-06-05 22:03:17,685 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:17,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936792226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:17,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:17,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:03:17,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438689997] [2021-06-05 22:03:17,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:03:17,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:17,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:03:17,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:03:17,686 INFO L87 Difference]: Start difference. First operand 268 states and 586 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:18,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:18,351 INFO L93 Difference]: Finished difference Result 300 states and 644 transitions. [2021-06-05 22:03:18,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:03:18,351 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:18,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:18,352 INFO L225 Difference]: With dead ends: 300 [2021-06-05 22:03:18,352 INFO L226 Difference]: Without dead ends: 284 [2021-06-05 22:03:18,352 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 740.3ms TimeCoverageRelationStatistics Valid=112, Invalid=1078, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:03:18,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-06-05 22:03:18,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 269. [2021-06-05 22:03:18,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.1940298507462686) internal successors, (588), 268 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:18,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 588 transitions. [2021-06-05 22:03:18,354 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 588 transitions. Word has length 20 [2021-06-05 22:03:18,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:18,354 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 588 transitions. [2021-06-05 22:03:18,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:18,354 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 588 transitions. [2021-06-05 22:03:18,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:18,354 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:18,354 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:18,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 805 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3828 [2021-06-05 22:03:18,555 INFO L430 AbstractCegarLoop]: === Iteration 811 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:18,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:18,555 INFO L82 PathProgramCache]: Analyzing trace with hash 997704694, now seen corresponding path program 805 times [2021-06-05 22:03:18,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:18,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502804315] [2021-06-05 22:03:18,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:18,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:18,794 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:18,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:18,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502804315] [2021-06-05 22:03:18,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502804315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:18,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380958161] [2021-06-05 22:03:18,794 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 806 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 806 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:18,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:18,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:03:18,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:19,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:19,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:19,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:03:19,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:19,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:19,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:03:19,050 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:19,073 INFO L628 ElimStorePlain]: treesize reduction 36, result has 47.8 percent of original size [2021-06-05 22:03:19,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:19,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:03:19,076 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:19,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:19,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:03:19,083 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:03:19,127 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:19,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380958161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:19,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:19,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:03:19,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341797886] [2021-06-05 22:03:19,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:03:19,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:19,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:03:19,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:03:19,128 INFO L87 Difference]: Start difference. First operand 269 states and 588 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:19,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:19,698 INFO L93 Difference]: Finished difference Result 299 states and 642 transitions. [2021-06-05 22:03:19,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:03:19,698 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:19,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:19,698 INFO L225 Difference]: With dead ends: 299 [2021-06-05 22:03:19,698 INFO L226 Difference]: Without dead ends: 286 [2021-06-05 22:03:19,698 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 720.8ms TimeCoverageRelationStatistics Valid=108, Invalid=948, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:03:19,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-06-05 22:03:19,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 270. [2021-06-05 22:03:19,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.193308550185874) internal successors, (590), 269 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:19,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 590 transitions. [2021-06-05 22:03:19,700 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 590 transitions. Word has length 20 [2021-06-05 22:03:19,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:19,700 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 590 transitions. [2021-06-05 22:03:19,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:19,701 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 590 transitions. [2021-06-05 22:03:19,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:19,701 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:19,701 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:19,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3831,806 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:19,901 INFO L430 AbstractCegarLoop]: === Iteration 812 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:19,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:19,901 INFO L82 PathProgramCache]: Analyzing trace with hash 2133889966, now seen corresponding path program 806 times [2021-06-05 22:03:19,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:19,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985049269] [2021-06-05 22:03:19,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:19,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:20,187 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:20,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:20,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985049269] [2021-06-05 22:03:20,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985049269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:20,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469927453] [2021-06-05 22:03:20,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 807 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 807 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:20,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:03:20,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:20,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:03:20,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:20,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:20,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:20,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:20,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:20,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:20,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:20,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:20,392 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:20,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:20,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:20,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:20,396 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:20,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:20,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:20,399 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:20,455 INFO L628 ElimStorePlain]: treesize reduction 80, result has 46.7 percent of original size [2021-06-05 22:03:20,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:20,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:20,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:03:20,461 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:20,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:20,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:03:20,465 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:20,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:20,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:03:20,499 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 22:03:20,587 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:20,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469927453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:20,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:20,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:03:20,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621205099] [2021-06-05 22:03:20,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:03:20,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:20,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:03:20,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:03:20,588 INFO L87 Difference]: Start difference. First operand 270 states and 590 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:21,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:21,169 INFO L93 Difference]: Finished difference Result 299 states and 640 transitions. [2021-06-05 22:03:21,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:03:21,169 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:21,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:21,170 INFO L225 Difference]: With dead ends: 299 [2021-06-05 22:03:21,170 INFO L226 Difference]: Without dead ends: 287 [2021-06-05 22:03:21,170 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 759.6ms TimeCoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:03:21,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-06-05 22:03:21,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 268. [2021-06-05 22:03:21,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.194756554307116) internal successors, (586), 267 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:21,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 586 transitions. [2021-06-05 22:03:21,172 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 586 transitions. Word has length 20 [2021-06-05 22:03:21,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:21,172 INFO L482 AbstractCegarLoop]: Abstraction has 268 states and 586 transitions. [2021-06-05 22:03:21,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:21,172 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 586 transitions. [2021-06-05 22:03:21,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:21,172 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:21,172 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:21,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 807 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3832 [2021-06-05 22:03:21,373 INFO L430 AbstractCegarLoop]: === Iteration 813 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:21,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:21,373 INFO L82 PathProgramCache]: Analyzing trace with hash -750098650, now seen corresponding path program 807 times [2021-06-05 22:03:21,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:21,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822361260] [2021-06-05 22:03:21,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:21,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:21,568 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:21,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:21,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822361260] [2021-06-05 22:03:21,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822361260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:21,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122326261] [2021-06-05 22:03:21,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 808 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 808 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:21,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:03:21,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:21,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:03:21,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:21,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:21,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:21,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:03:21,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:21,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:21,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:03:21,761 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:21,787 INFO L628 ElimStorePlain]: treesize reduction 36, result has 47.8 percent of original size [2021-06-05 22:03:21,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:21,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:03:21,790 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:21,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:21,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:03:21,797 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:03:21,839 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:21,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122326261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:21,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:21,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:03:21,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510884037] [2021-06-05 22:03:21,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:03:21,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:21,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:03:21,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:03:21,839 INFO L87 Difference]: Start difference. First operand 268 states and 586 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:22,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:22,225 INFO L93 Difference]: Finished difference Result 297 states and 634 transitions. [2021-06-05 22:03:22,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:03:22,230 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:22,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:22,231 INFO L225 Difference]: With dead ends: 297 [2021-06-05 22:03:22,231 INFO L226 Difference]: Without dead ends: 281 [2021-06-05 22:03:22,231 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 480.9ms TimeCoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:03:22,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-06-05 22:03:22,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 270. [2021-06-05 22:03:22,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.193308550185874) internal successors, (590), 269 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:22,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 590 transitions. [2021-06-05 22:03:22,233 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 590 transitions. Word has length 20 [2021-06-05 22:03:22,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:22,233 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 590 transitions. [2021-06-05 22:03:22,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:22,233 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 590 transitions. [2021-06-05 22:03:22,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:22,233 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:22,233 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:22,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 808 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3835 [2021-06-05 22:03:22,434 INFO L430 AbstractCegarLoop]: === Iteration 814 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:22,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:22,434 INFO L82 PathProgramCache]: Analyzing trace with hash 111906414, now seen corresponding path program 808 times [2021-06-05 22:03:22,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:22,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632257937] [2021-06-05 22:03:22,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:22,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:22,632 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:22,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:22,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632257937] [2021-06-05 22:03:22,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632257937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:22,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167862369] [2021-06-05 22:03:22,633 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 809 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 809 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:22,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:03:22,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:22,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:03:22,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:22,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:22,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:22,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:03:22,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:22,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:22,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:03:22,838 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:22,860 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-06-05 22:03:22,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:22,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:03:22,864 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:22,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:22,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:03:22,871 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:03:22,911 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:22,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167862369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:22,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:22,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 22:03:22,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103644694] [2021-06-05 22:03:22,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:03:22,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:22,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:03:22,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:03:22,911 INFO L87 Difference]: Start difference. First operand 270 states and 590 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:23,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:23,447 INFO L93 Difference]: Finished difference Result 302 states and 649 transitions. [2021-06-05 22:03:23,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:03:23,447 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:23,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:23,447 INFO L225 Difference]: With dead ends: 302 [2021-06-05 22:03:23,447 INFO L226 Difference]: Without dead ends: 289 [2021-06-05 22:03:23,447 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 582.5ms TimeCoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:03:23,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-06-05 22:03:23,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 271. [2021-06-05 22:03:23,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 2.1925925925925926) internal successors, (592), 270 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:23,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 592 transitions. [2021-06-05 22:03:23,449 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 592 transitions. Word has length 20 [2021-06-05 22:03:23,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:23,449 INFO L482 AbstractCegarLoop]: Abstraction has 271 states and 592 transitions. [2021-06-05 22:03:23,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:23,450 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 592 transitions. [2021-06-05 22:03:23,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:23,450 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:23,450 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:23,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3836,809 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:23,650 INFO L430 AbstractCegarLoop]: === Iteration 815 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:23,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:23,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1248091686, now seen corresponding path program 809 times [2021-06-05 22:03:23,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:23,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483530052] [2021-06-05 22:03:23,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:23,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:23,804 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:23,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:23,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483530052] [2021-06-05 22:03:23,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483530052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:23,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573860328] [2021-06-05 22:03:23,804 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 810 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 810 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:23,831 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:03:23,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:23,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:03:23,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:23,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:23,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:23,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:23,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:23,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:23,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:23,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:23,986 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:23,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:23,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:23,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:23,991 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:23,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:23,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:23,994 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:24,050 INFO L628 ElimStorePlain]: treesize reduction 77, result has 45.4 percent of original size [2021-06-05 22:03:24,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:24,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:24,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:03:24,055 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:24,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:24,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:03:24,059 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:24,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:24,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:03:24,083 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 22:03:24,159 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:24,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573860328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:24,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:24,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 22:03:24,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103110823] [2021-06-05 22:03:24,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:03:24,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:24,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:03:24,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:03:24,160 INFO L87 Difference]: Start difference. First operand 271 states and 592 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:24,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:24,590 INFO L93 Difference]: Finished difference Result 331 states and 693 transitions. [2021-06-05 22:03:24,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:03:24,590 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:24,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:24,590 INFO L225 Difference]: With dead ends: 331 [2021-06-05 22:03:24,590 INFO L226 Difference]: Without dead ends: 309 [2021-06-05 22:03:24,590 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 532.7ms TimeCoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:03:24,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-06-05 22:03:24,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 268. [2021-06-05 22:03:24,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.194756554307116) internal successors, (586), 267 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:24,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 586 transitions. [2021-06-05 22:03:24,593 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 586 transitions. Word has length 20 [2021-06-05 22:03:24,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:24,593 INFO L482 AbstractCegarLoop]: Abstraction has 268 states and 586 transitions. [2021-06-05 22:03:24,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:24,593 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 586 transitions. [2021-06-05 22:03:24,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:24,593 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:24,593 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:24,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3837,810 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:24,793 INFO L430 AbstractCegarLoop]: === Iteration 816 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:24,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:24,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1994877706, now seen corresponding path program 810 times [2021-06-05 22:03:24,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:24,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215079678] [2021-06-05 22:03:24,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:24,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:24,982 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:24,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:24,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215079678] [2021-06-05 22:03:24,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215079678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:24,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203136616] [2021-06-05 22:03:24,982 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 811 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 811 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:25,009 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:03:25,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:25,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:03:25,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:25,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:25,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:25,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:03:25,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:25,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:25,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:03:25,170 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:25,191 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-06-05 22:03:25,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:25,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:03:25,194 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:25,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:25,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:03:25,202 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:03:25,244 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:25,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203136616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:25,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:25,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:03:25,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554841010] [2021-06-05 22:03:25,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:03:25,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:25,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:03:25,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:03:25,244 INFO L87 Difference]: Start difference. First operand 268 states and 586 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:25,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:25,688 INFO L93 Difference]: Finished difference Result 300 states and 644 transitions. [2021-06-05 22:03:25,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:03:25,689 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:25,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:25,689 INFO L225 Difference]: With dead ends: 300 [2021-06-05 22:03:25,689 INFO L226 Difference]: Without dead ends: 287 [2021-06-05 22:03:25,689 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 490.4ms TimeCoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:03:25,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-06-05 22:03:25,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 270. [2021-06-05 22:03:25,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.193308550185874) internal successors, (590), 269 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:25,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 590 transitions. [2021-06-05 22:03:25,691 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 590 transitions. Word has length 20 [2021-06-05 22:03:25,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:25,691 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 590 transitions. [2021-06-05 22:03:25,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:25,691 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 590 transitions. [2021-06-05 22:03:25,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:25,691 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:25,691 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:25,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3840,811 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:25,892 INFO L430 AbstractCegarLoop]: === Iteration 817 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:25,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:25,892 INFO L82 PathProgramCache]: Analyzing trace with hash -858692434, now seen corresponding path program 811 times [2021-06-05 22:03:25,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:25,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537289981] [2021-06-05 22:03:25,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:25,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:26,109 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:26,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:26,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537289981] [2021-06-05 22:03:26,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537289981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:26,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864310859] [2021-06-05 22:03:26,109 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 812 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 812 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:26,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:26,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:03:26,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:26,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:26,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:26,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:26,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:26,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:26,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:26,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:26,272 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:26,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:26,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:26,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:26,276 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:26,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:26,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:26,279 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:26,333 INFO L628 ElimStorePlain]: treesize reduction 83, result has 44.7 percent of original size [2021-06-05 22:03:26,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:26,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:26,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:03:26,337 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:26,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:26,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:03:26,341 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:26,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:26,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:03:26,365 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 22:03:26,448 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:26,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864310859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:26,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:26,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:03:26,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681413955] [2021-06-05 22:03:26,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:03:26,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:26,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:03:26,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:03:26,448 INFO L87 Difference]: Start difference. First operand 270 states and 590 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:27,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:27,028 INFO L93 Difference]: Finished difference Result 326 states and 686 transitions. [2021-06-05 22:03:27,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:03:27,028 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:27,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:27,028 INFO L225 Difference]: With dead ends: 326 [2021-06-05 22:03:27,028 INFO L226 Difference]: Without dead ends: 307 [2021-06-05 22:03:27,028 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 676.7ms TimeCoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:03:27,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-06-05 22:03:27,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 269. [2021-06-05 22:03:27,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.1940298507462686) internal successors, (588), 268 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:27,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 588 transitions. [2021-06-05 22:03:27,030 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 588 transitions. Word has length 20 [2021-06-05 22:03:27,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:27,031 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 588 transitions. [2021-06-05 22:03:27,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:27,031 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 588 transitions. [2021-06-05 22:03:27,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:27,031 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:27,031 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:27,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 812 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3841 [2021-06-05 22:03:27,231 INFO L430 AbstractCegarLoop]: === Iteration 818 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:27,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:27,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1290104102, now seen corresponding path program 812 times [2021-06-05 22:03:27,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:27,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999770669] [2021-06-05 22:03:27,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:27,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:27,437 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:27,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:27,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999770669] [2021-06-05 22:03:27,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999770669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:27,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186665244] [2021-06-05 22:03:27,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 813 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 813 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:27,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:03:27,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:27,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:03:27,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:27,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:27,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:27,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:27,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:27,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:27,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:27,617 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:27,678 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-06-05 22:03:27,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:27,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:03:27,682 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:27,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:27,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:27,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:27,710 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:27,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:27,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:27,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:03:27,736 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:27,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:27,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:03:27,759 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:03:27,841 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:27,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186665244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:27,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:27,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:03:27,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889011315] [2021-06-05 22:03:27,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:03:27,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:27,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:03:27,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:03:27,842 INFO L87 Difference]: Start difference. First operand 269 states and 588 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:28,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:28,435 INFO L93 Difference]: Finished difference Result 343 states and 724 transitions. [2021-06-05 22:03:28,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:03:28,435 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:28,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:28,436 INFO L225 Difference]: With dead ends: 343 [2021-06-05 22:03:28,436 INFO L226 Difference]: Without dead ends: 324 [2021-06-05 22:03:28,436 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 644.8ms TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:03:28,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-06-05 22:03:28,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 267. [2021-06-05 22:03:28,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.1954887218045114) internal successors, (584), 266 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:28,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 584 transitions. [2021-06-05 22:03:28,438 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 584 transitions. Word has length 20 [2021-06-05 22:03:28,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:28,438 INFO L482 AbstractCegarLoop]: Abstraction has 267 states and 584 transitions. [2021-06-05 22:03:28,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:28,438 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 584 transitions. [2021-06-05 22:03:28,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:28,439 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:28,439 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:28,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3844,813 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:28,639 INFO L430 AbstractCegarLoop]: === Iteration 819 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:28,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:28,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1854925742, now seen corresponding path program 813 times [2021-06-05 22:03:28,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:28,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063935150] [2021-06-05 22:03:28,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:28,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:28,824 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:28,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:28,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063935150] [2021-06-05 22:03:28,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063935150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:28,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5533140] [2021-06-05 22:03:28,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 814 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 814 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:28,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:03:28,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:28,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:03:28,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:29,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:29,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:29,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:29,002 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:29,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:29,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:29,005 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:29,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:29,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:29,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:29,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:03:29,028 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:29,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:29,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:03:29,031 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:29,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:29,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:03:29,049 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:29 [2021-06-05 22:03:29,108 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:29,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5533140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:29,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:29,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:03:29,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925931145] [2021-06-05 22:03:29,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:03:29,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:29,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:03:29,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:03:29,109 INFO L87 Difference]: Start difference. First operand 267 states and 584 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:29,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:29,607 INFO L93 Difference]: Finished difference Result 313 states and 666 transitions. [2021-06-05 22:03:29,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:03:29,607 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:29,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:29,607 INFO L225 Difference]: With dead ends: 313 [2021-06-05 22:03:29,607 INFO L226 Difference]: Without dead ends: 288 [2021-06-05 22:03:29,608 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 551.7ms TimeCoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:03:29,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-06-05 22:03:29,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 269. [2021-06-05 22:03:29,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.1940298507462686) internal successors, (588), 268 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:29,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 588 transitions. [2021-06-05 22:03:29,609 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 588 transitions. Word has length 20 [2021-06-05 22:03:29,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:29,610 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 588 transitions. [2021-06-05 22:03:29,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:29,610 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 588 transitions. [2021-06-05 22:03:29,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:29,610 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:29,610 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:29,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 814 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3849 [2021-06-05 22:03:29,810 INFO L430 AbstractCegarLoop]: === Iteration 820 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:29,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:29,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1578036490, now seen corresponding path program 814 times [2021-06-05 22:03:29,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:29,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490972812] [2021-06-05 22:03:29,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:29,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:30,022 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:30,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:30,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490972812] [2021-06-05 22:03:30,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490972812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:30,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247041752] [2021-06-05 22:03:30,023 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 815 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 815 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:30,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:03:30,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:30,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:03:30,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:30,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:30,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:30,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:03:30,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:30,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:30,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:03:30,223 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:30,244 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-06-05 22:03:30,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:30,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:03:30,247 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:30,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:30,255 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:03:30,255 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:03:30,298 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:30,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247041752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:30,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:30,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:03:30,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395542443] [2021-06-05 22:03:30,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:03:30,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:30,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:03:30,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:03:30,299 INFO L87 Difference]: Start difference. First operand 269 states and 588 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:30,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:30,791 INFO L93 Difference]: Finished difference Result 297 states and 635 transitions. [2021-06-05 22:03:30,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:03:30,792 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:30,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:30,792 INFO L225 Difference]: With dead ends: 297 [2021-06-05 22:03:30,792 INFO L226 Difference]: Without dead ends: 284 [2021-06-05 22:03:30,792 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 612.4ms TimeCoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:03:30,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-06-05 22:03:30,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 270. [2021-06-05 22:03:30,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.193308550185874) internal successors, (590), 269 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:30,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 590 transitions. [2021-06-05 22:03:30,794 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 590 transitions. Word has length 20 [2021-06-05 22:03:30,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:30,794 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 590 transitions. [2021-06-05 22:03:30,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:30,794 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 590 transitions. [2021-06-05 22:03:30,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:30,794 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:30,794 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:30,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3852,815 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:30,995 INFO L430 AbstractCegarLoop]: === Iteration 821 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:30,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:30,995 INFO L82 PathProgramCache]: Analyzing trace with hash -441851218, now seen corresponding path program 815 times [2021-06-05 22:03:30,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:30,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200181284] [2021-06-05 22:03:30,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:30,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:31,213 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:31,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:31,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200181284] [2021-06-05 22:03:31,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200181284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:31,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742916805] [2021-06-05 22:03:31,214 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 816 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 816 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:31,240 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:03:31,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:31,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:03:31,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:31,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:31,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:31,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:31,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:31,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:31,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:31,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:31,389 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:31,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:31,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:31,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:31,393 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:31,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:31,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:31,396 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:31,453 INFO L628 ElimStorePlain]: treesize reduction 77, result has 46.5 percent of original size [2021-06-05 22:03:31,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:31,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:31,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:03:31,458 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:31,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:31,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:03:31,461 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:31,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:31,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:03:31,485 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 22:03:31,567 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:31,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742916805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:31,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:31,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:03:31,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761459332] [2021-06-05 22:03:31,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:03:31,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:31,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:03:31,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:03:31,568 INFO L87 Difference]: Start difference. First operand 270 states and 590 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:32,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:32,303 INFO L93 Difference]: Finished difference Result 330 states and 691 transitions. [2021-06-05 22:03:32,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:03:32,303 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:32,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:32,304 INFO L225 Difference]: With dead ends: 330 [2021-06-05 22:03:32,304 INFO L226 Difference]: Without dead ends: 308 [2021-06-05 22:03:32,304 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 825.0ms TimeCoverageRelationStatistics Valid=134, Invalid=1126, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:03:32,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-06-05 22:03:32,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 268. [2021-06-05 22:03:32,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.194756554307116) internal successors, (586), 267 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:32,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 586 transitions. [2021-06-05 22:03:32,306 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 586 transitions. Word has length 20 [2021-06-05 22:03:32,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:32,306 INFO L482 AbstractCegarLoop]: Abstraction has 268 states and 586 transitions. [2021-06-05 22:03:32,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:32,306 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 586 transitions. [2021-06-05 22:03:32,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:32,307 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:32,307 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:32,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3853,816 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:32,507 INFO L430 AbstractCegarLoop]: === Iteration 822 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:32,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:32,507 INFO L82 PathProgramCache]: Analyzing trace with hash 610146686, now seen corresponding path program 816 times [2021-06-05 22:03:32,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:32,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454326718] [2021-06-05 22:03:32,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:32,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:32,700 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:32,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:32,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454326718] [2021-06-05 22:03:32,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454326718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:32,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817789325] [2021-06-05 22:03:32,700 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 817 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 817 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:32,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:03:32,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:32,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:03:32,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:32,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:32,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:32,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:03:32,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:32,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:32,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:03:32,881 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:32,902 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-06-05 22:03:32,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:32,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:03:32,906 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:32,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:32,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:03:32,913 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:03:32,954 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:32,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817789325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:32,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:32,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:03:32,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839884061] [2021-06-05 22:03:32,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:03:32,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:32,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:03:32,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:03:32,954 INFO L87 Difference]: Start difference. First operand 268 states and 586 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:33,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:33,305 INFO L93 Difference]: Finished difference Result 296 states and 636 transitions. [2021-06-05 22:03:33,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:03:33,305 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:33,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:33,305 INFO L225 Difference]: With dead ends: 296 [2021-06-05 22:03:33,305 INFO L226 Difference]: Without dead ends: 283 [2021-06-05 22:03:33,305 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 506.2ms TimeCoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:03:33,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-06-05 22:03:33,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 270. [2021-06-05 22:03:33,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.193308550185874) internal successors, (590), 269 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:33,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 590 transitions. [2021-06-05 22:03:33,307 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 590 transitions. Word has length 20 [2021-06-05 22:03:33,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:33,307 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 590 transitions. [2021-06-05 22:03:33,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:33,308 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 590 transitions. [2021-06-05 22:03:33,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:33,308 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:33,308 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:33,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3856,817 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:33,508 INFO L430 AbstractCegarLoop]: === Iteration 823 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:33,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:33,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1746331958, now seen corresponding path program 817 times [2021-06-05 22:03:33,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:33,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147284844] [2021-06-05 22:03:33,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:33,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:33,736 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:33,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:33,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147284844] [2021-06-05 22:03:33,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147284844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:33,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000802595] [2021-06-05 22:03:33,737 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 818 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 818 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:33,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:33,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:03:33,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:33,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:33,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:33,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:33,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:33,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:33,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:33,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:33,897 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:33,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:33,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:33,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:33,901 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:33,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:33,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:33,904 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:33,958 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-06-05 22:03:33,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:33,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:33,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:03:33,963 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:33,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:33,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:03:33,966 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:33,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:33,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:03:33,990 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 22:03:34,071 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:34,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000802595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:34,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:34,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:03:34,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608694682] [2021-06-05 22:03:34,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:03:34,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:34,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:03:34,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:03:34,071 INFO L87 Difference]: Start difference. First operand 270 states and 590 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:34,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:34,611 INFO L93 Difference]: Finished difference Result 319 states and 672 transitions. [2021-06-05 22:03:34,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:03:34,611 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:34,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:34,611 INFO L225 Difference]: With dead ends: 319 [2021-06-05 22:03:34,611 INFO L226 Difference]: Without dead ends: 300 [2021-06-05 22:03:34,611 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 732.0ms TimeCoverageRelationStatistics Valid=133, Invalid=989, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:03:34,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-06-05 22:03:34,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 269. [2021-06-05 22:03:34,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.1940298507462686) internal successors, (588), 268 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:34,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 588 transitions. [2021-06-05 22:03:34,613 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 588 transitions. Word has length 20 [2021-06-05 22:03:34,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:34,614 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 588 transitions. [2021-06-05 22:03:34,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:34,614 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 588 transitions. [2021-06-05 22:03:34,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:34,614 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:34,614 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:34,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 818 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3857 [2021-06-05 22:03:34,814 INFO L430 AbstractCegarLoop]: === Iteration 824 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:34,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:34,814 INFO L82 PathProgramCache]: Analyzing trace with hash -399838802, now seen corresponding path program 818 times [2021-06-05 22:03:34,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:34,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303745726] [2021-06-05 22:03:34,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:34,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:35,039 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:35,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:35,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303745726] [2021-06-05 22:03:35,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303745726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:35,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767583541] [2021-06-05 22:03:35,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 819 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 819 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:35,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:03:35,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:35,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:03:35,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:35,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:35,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:35,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:35,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:35,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:35,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:35,220 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:35,283 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-06-05 22:03:35,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:35,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:03:35,287 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:35,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:35,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:35,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:35,316 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:35,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:35,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:35,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:03:35,343 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:35,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:35,366 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:03:35,366 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:03:35,450 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:35,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767583541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:35,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:35,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:03:35,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480110796] [2021-06-05 22:03:35,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:03:35,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:35,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:03:35,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:03:35,451 INFO L87 Difference]: Start difference. First operand 269 states and 588 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:35,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:35,918 INFO L93 Difference]: Finished difference Result 339 states and 716 transitions. [2021-06-05 22:03:35,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:03:35,918 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:35,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:35,921 INFO L225 Difference]: With dead ends: 339 [2021-06-05 22:03:35,921 INFO L226 Difference]: Without dead ends: 320 [2021-06-05 22:03:35,921 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 652.1ms TimeCoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:03:35,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-06-05 22:03:35,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 267. [2021-06-05 22:03:35,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.1954887218045114) internal successors, (584), 266 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:35,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 584 transitions. [2021-06-05 22:03:35,923 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 584 transitions. Word has length 20 [2021-06-05 22:03:35,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:35,923 INFO L482 AbstractCegarLoop]: Abstraction has 267 states and 584 transitions. [2021-06-05 22:03:35,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:35,923 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 584 transitions. [2021-06-05 22:03:35,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:35,924 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:35,924 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:36,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3860,819 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:36,124 INFO L430 AbstractCegarLoop]: === Iteration 825 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:36,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:36,124 INFO L82 PathProgramCache]: Analyzing trace with hash -275651594, now seen corresponding path program 819 times [2021-06-05 22:03:36,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:36,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169755898] [2021-06-05 22:03:36,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:36,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:36,295 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:36,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:36,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169755898] [2021-06-05 22:03:36,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169755898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:36,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17777869] [2021-06-05 22:03:36,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 820 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 820 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:36,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:03:36,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:36,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:03:36,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:36,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:36,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:36,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:36,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:36,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:36,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:36,467 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:36,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:36,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:36,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:36,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:03:36,489 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:36,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:36,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:03:36,493 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:36,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:36,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:03:36,511 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:29 [2021-06-05 22:03:36,565 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:36,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17777869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:36,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:36,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:03:36,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8211782] [2021-06-05 22:03:36,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:03:36,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:36,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:03:36,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:03:36,565 INFO L87 Difference]: Start difference. First operand 267 states and 584 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:37,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:37,005 INFO L93 Difference]: Finished difference Result 301 states and 646 transitions. [2021-06-05 22:03:37,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:03:37,005 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:37,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:37,006 INFO L225 Difference]: With dead ends: 301 [2021-06-05 22:03:37,006 INFO L226 Difference]: Without dead ends: 288 [2021-06-05 22:03:37,006 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 490.9ms TimeCoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:03:37,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-06-05 22:03:37,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 270. [2021-06-05 22:03:37,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.193308550185874) internal successors, (590), 269 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:37,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 590 transitions. [2021-06-05 22:03:37,008 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 590 transitions. Word has length 20 [2021-06-05 22:03:37,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:37,008 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 590 transitions. [2021-06-05 22:03:37,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:37,008 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 590 transitions. [2021-06-05 22:03:37,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:37,008 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:37,008 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:37,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3865,820 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:37,209 INFO L430 AbstractCegarLoop]: === Iteration 826 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:37,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:37,209 INFO L82 PathProgramCache]: Analyzing trace with hash 860533678, now seen corresponding path program 820 times [2021-06-05 22:03:37,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:37,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270483147] [2021-06-05 22:03:37,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:37,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:37,457 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:37,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:37,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270483147] [2021-06-05 22:03:37,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270483147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:37,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286356673] [2021-06-05 22:03:37,458 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 821 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 821 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:37,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:03:37,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:37,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:03:37,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:37,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:37,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:37,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:37,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:37,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:37,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:37,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:37,620 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:37,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:37,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:37,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:37,624 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:37,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:37,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:37,627 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:37,682 INFO L628 ElimStorePlain]: treesize reduction 83, result has 44.7 percent of original size [2021-06-05 22:03:37,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:37,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:37,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:03:37,686 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:37,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:37,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:03:37,690 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:37,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:37,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:03:37,714 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 22:03:37,800 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:37,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286356673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:37,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:37,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:03:37,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276738509] [2021-06-05 22:03:37,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:03:37,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:37,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:03:37,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:03:37,801 INFO L87 Difference]: Start difference. First operand 270 states and 590 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:38,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:38,393 INFO L93 Difference]: Finished difference Result 326 states and 686 transitions. [2021-06-05 22:03:38,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:03:38,393 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:38,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:38,393 INFO L225 Difference]: With dead ends: 326 [2021-06-05 22:03:38,393 INFO L226 Difference]: Without dead ends: 307 [2021-06-05 22:03:38,393 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 721.1ms TimeCoverageRelationStatistics Valid=121, Invalid=871, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:03:38,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-06-05 22:03:38,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 269. [2021-06-05 22:03:38,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.1940298507462686) internal successors, (588), 268 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:38,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 588 transitions. [2021-06-05 22:03:38,396 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 588 transitions. Word has length 20 [2021-06-05 22:03:38,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:38,396 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 588 transitions. [2021-06-05 22:03:38,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:38,396 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 588 transitions. [2021-06-05 22:03:38,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:38,396 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:38,396 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:38,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 821 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3868 [2021-06-05 22:03:38,597 INFO L430 AbstractCegarLoop]: === Iteration 827 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:38,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:38,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1285637082, now seen corresponding path program 821 times [2021-06-05 22:03:38,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:38,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197352568] [2021-06-05 22:03:38,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:38,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:38,828 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:38,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:38,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197352568] [2021-06-05 22:03:38,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197352568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:38,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237319921] [2021-06-05 22:03:38,828 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 822 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 822 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:38,856 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:03:38,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:38,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:03:38,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:39,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:39,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:39,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:39,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:39,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:39,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:39,016 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:39,077 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-06-05 22:03:39,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:39,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:03:39,081 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:39,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:39,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:39,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:39,109 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:39,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:39,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:39,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:03:39,136 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:39,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:39,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:03:39,158 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:03:39,240 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:39,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237319921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:39,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:39,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:03:39,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787970653] [2021-06-05 22:03:39,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:03:39,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:39,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:03:39,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:03:39,241 INFO L87 Difference]: Start difference. First operand 269 states and 588 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:40,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:40,019 INFO L93 Difference]: Finished difference Result 341 states and 719 transitions. [2021-06-05 22:03:40,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:03:40,019 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:40,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:40,019 INFO L225 Difference]: With dead ends: 341 [2021-06-05 22:03:40,019 INFO L226 Difference]: Without dead ends: 319 [2021-06-05 22:03:40,020 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 860.2ms TimeCoverageRelationStatistics Valid=150, Invalid=1110, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:03:40,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-06-05 22:03:40,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 273. [2021-06-05 22:03:40,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 2.1948529411764706) internal successors, (597), 272 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:40,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 597 transitions. [2021-06-05 22:03:40,022 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 597 transitions. Word has length 20 [2021-06-05 22:03:40,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:40,022 INFO L482 AbstractCegarLoop]: Abstraction has 273 states and 597 transitions. [2021-06-05 22:03:40,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:40,022 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 597 transitions. [2021-06-05 22:03:40,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:40,022 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:40,022 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:40,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3871,822 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:40,223 INFO L430 AbstractCegarLoop]: === Iteration 828 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:40,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:40,223 INFO L82 PathProgramCache]: Analyzing trace with hash 902546094, now seen corresponding path program 822 times [2021-06-05 22:03:40,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:40,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080543637] [2021-06-05 22:03:40,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:40,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:40,453 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:40,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:40,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080543637] [2021-06-05 22:03:40,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080543637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:40,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571413267] [2021-06-05 22:03:40,453 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 823 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 823 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:40,480 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:03:40,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:40,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:03:40,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:40,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:40,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:40,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:40,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:40,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:40,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:03:40,695 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:40,717 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:40,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:40,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:40,720 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:40,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:40,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:40,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:03:40,744 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:40,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:40,764 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:03:40,764 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-06-05 22:03:40,858 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:40,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571413267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:40,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:40,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:03:40,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434635799] [2021-06-05 22:03:40,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:03:40,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:40,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:03:40,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:03:40,859 INFO L87 Difference]: Start difference. First operand 273 states and 597 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:41,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:41,448 INFO L93 Difference]: Finished difference Result 322 states and 686 transitions. [2021-06-05 22:03:41,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:03:41,448 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:41,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:41,448 INFO L225 Difference]: With dead ends: 322 [2021-06-05 22:03:41,448 INFO L226 Difference]: Without dead ends: 308 [2021-06-05 22:03:41,448 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 685.4ms TimeCoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:03:41,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-06-05 22:03:41,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 273. [2021-06-05 22:03:41,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 2.1948529411764706) internal successors, (597), 272 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:41,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 597 transitions. [2021-06-05 22:03:41,451 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 597 transitions. Word has length 20 [2021-06-05 22:03:41,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:41,451 INFO L482 AbstractCegarLoop]: Abstraction has 273 states and 597 transitions. [2021-06-05 22:03:41,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:41,451 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 597 transitions. [2021-06-05 22:03:41,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:41,451 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:41,451 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:41,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3876,823 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:41,651 INFO L430 AbstractCegarLoop]: === Iteration 829 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:41,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:41,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1006303270, now seen corresponding path program 823 times [2021-06-05 22:03:41,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:41,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639032311] [2021-06-05 22:03:41,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:41,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:41,832 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:41,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:41,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639032311] [2021-06-05 22:03:41,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639032311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:41,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032155011] [2021-06-05 22:03:41,833 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 824 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 824 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:41,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:41,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:03:41,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:42,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:42,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:42,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:03:42,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:42,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:42,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:03:42,029 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:42,052 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-06-05 22:03:42,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:42,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:03:42,055 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:42,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:42,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:03:42,063 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:03:42,105 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:42,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032155011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:42,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:42,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:03:42,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239351784] [2021-06-05 22:03:42,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:03:42,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:42,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:03:42,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:03:42,106 INFO L87 Difference]: Start difference. First operand 273 states and 597 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:42,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:42,513 INFO L93 Difference]: Finished difference Result 302 states and 645 transitions. [2021-06-05 22:03:42,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:03:42,514 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:42,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:42,514 INFO L225 Difference]: With dead ends: 302 [2021-06-05 22:03:42,514 INFO L226 Difference]: Without dead ends: 286 [2021-06-05 22:03:42,514 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 479.3ms TimeCoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:03:42,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-06-05 22:03:42,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 276. [2021-06-05 22:03:42,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.192727272727273) internal successors, (603), 275 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:42,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 603 transitions. [2021-06-05 22:03:42,516 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 603 transitions. Word has length 20 [2021-06-05 22:03:42,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:42,516 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 603 transitions. [2021-06-05 22:03:42,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:42,516 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 603 transitions. [2021-06-05 22:03:42,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:42,517 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:42,517 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:42,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3883,824 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:42,717 INFO L430 AbstractCegarLoop]: === Iteration 830 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:42,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:42,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1868308334, now seen corresponding path program 824 times [2021-06-05 22:03:42,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:42,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221550786] [2021-06-05 22:03:42,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:42,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:42,903 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:42,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:42,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221550786] [2021-06-05 22:03:42,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221550786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:42,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670451266] [2021-06-05 22:03:42,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 825 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 825 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:42,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:03:42,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:42,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:03:42,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:43,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:43,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:43,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:03:43,103 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:43,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:43,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:03:43,106 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:43,129 INFO L628 ElimStorePlain]: treesize reduction 36, result has 47.8 percent of original size [2021-06-05 22:03:43,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:43,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:03:43,131 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:43,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:43,139 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:03:43,139 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:03:43,181 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:43,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670451266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:43,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:43,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:03:43,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115010912] [2021-06-05 22:03:43,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:03:43,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:43,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:03:43,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:03:43,182 INFO L87 Difference]: Start difference. First operand 276 states and 603 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:43,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:43,743 INFO L93 Difference]: Finished difference Result 310 states and 666 transitions. [2021-06-05 22:03:43,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:03:43,743 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:43,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:43,744 INFO L225 Difference]: With dead ends: 310 [2021-06-05 22:03:43,744 INFO L226 Difference]: Without dead ends: 297 [2021-06-05 22:03:43,744 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 621.3ms TimeCoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:03:43,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-06-05 22:03:43,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 277. [2021-06-05 22:03:43,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 2.1920289855072466) internal successors, (605), 276 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:43,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 605 transitions. [2021-06-05 22:03:43,746 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 605 transitions. Word has length 20 [2021-06-05 22:03:43,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:43,746 INFO L482 AbstractCegarLoop]: Abstraction has 277 states and 605 transitions. [2021-06-05 22:03:43,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:43,746 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 605 transitions. [2021-06-05 22:03:43,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:43,746 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:43,746 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:43,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3884,825 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:43,947 INFO L430 AbstractCegarLoop]: === Iteration 831 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:43,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:43,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1290473690, now seen corresponding path program 825 times [2021-06-05 22:03:43,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:43,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152354224] [2021-06-05 22:03:43,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:43,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:44,092 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:44,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:44,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152354224] [2021-06-05 22:03:44,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152354224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:44,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366353697] [2021-06-05 22:03:44,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 826 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 826 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:44,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:03:44,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:44,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:03:44,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:44,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:44,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:44,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:44,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:44,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:44,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:44,247 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:44,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:44,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:44,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:44,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:03:44,276 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:44,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:44,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:03:44,280 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:44,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:44,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:03:44,301 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 22:03:44,388 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:44,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366353697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:44,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:44,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 22:03:44,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193338267] [2021-06-05 22:03:44,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:03:44,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:44,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:03:44,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:03:44,389 INFO L87 Difference]: Start difference. First operand 277 states and 605 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:44,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:44,872 INFO L93 Difference]: Finished difference Result 312 states and 672 transitions. [2021-06-05 22:03:44,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:03:44,872 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:44,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:44,872 INFO L225 Difference]: With dead ends: 312 [2021-06-05 22:03:44,872 INFO L226 Difference]: Without dead ends: 305 [2021-06-05 22:03:44,873 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 531.5ms TimeCoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:03:44,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-06-05 22:03:44,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 275. [2021-06-05 22:03:44,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.1934306569343067) internal successors, (601), 274 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:44,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 601 transitions. [2021-06-05 22:03:44,875 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 601 transitions. Word has length 20 [2021-06-05 22:03:44,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:44,875 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 601 transitions. [2021-06-05 22:03:44,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:44,875 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 601 transitions. [2021-06-05 22:03:44,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:44,875 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:44,875 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:45,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3885,826 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:45,076 INFO L430 AbstractCegarLoop]: === Iteration 832 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:45,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:45,076 INFO L82 PathProgramCache]: Analyzing trace with hash -238475786, now seen corresponding path program 826 times [2021-06-05 22:03:45,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:45,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395082609] [2021-06-05 22:03:45,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:45,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:45,279 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:45,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:45,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395082609] [2021-06-05 22:03:45,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395082609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:45,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769498094] [2021-06-05 22:03:45,279 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 827 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 827 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:45,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:03:45,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:45,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:03:45,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:45,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:45,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:45,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:03:45,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:45,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:45,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:03:45,458 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:45,481 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-06-05 22:03:45,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:45,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:03:45,484 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:45,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:45,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:03:45,492 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:03:45,531 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:45,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769498094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:45,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:45,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:03:45,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167806681] [2021-06-05 22:03:45,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:03:45,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:45,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:03:45,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:03:45,532 INFO L87 Difference]: Start difference. First operand 275 states and 601 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:45,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:45,889 INFO L93 Difference]: Finished difference Result 300 states and 642 transitions. [2021-06-05 22:03:45,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:03:45,890 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:45,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:45,890 INFO L225 Difference]: With dead ends: 300 [2021-06-05 22:03:45,890 INFO L226 Difference]: Without dead ends: 287 [2021-06-05 22:03:45,890 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 482.7ms TimeCoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:03:45,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-06-05 22:03:45,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 277. [2021-06-05 22:03:45,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 2.1920289855072466) internal successors, (605), 276 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:45,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 605 transitions. [2021-06-05 22:03:45,892 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 605 transitions. Word has length 20 [2021-06-05 22:03:45,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:45,892 INFO L482 AbstractCegarLoop]: Abstraction has 277 states and 605 transitions. [2021-06-05 22:03:45,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:45,892 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 605 transitions. [2021-06-05 22:03:45,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:45,893 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:45,893 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:46,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3890,827 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:46,093 INFO L430 AbstractCegarLoop]: === Iteration 833 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:46,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:46,093 INFO L82 PathProgramCache]: Analyzing trace with hash 897709486, now seen corresponding path program 827 times [2021-06-05 22:03:46,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:46,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382838462] [2021-06-05 22:03:46,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:46,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:46,292 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:46,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:46,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382838462] [2021-06-05 22:03:46,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382838462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:46,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880537205] [2021-06-05 22:03:46,293 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 828 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 828 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:46,319 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:03:46,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:46,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:03:46,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:46,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:46,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:46,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:46,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:46,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:46,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:46,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:46,451 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:46,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:46,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:46,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:46,455 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:46,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:46,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:46,458 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:46,516 INFO L628 ElimStorePlain]: treesize reduction 77, result has 46.5 percent of original size [2021-06-05 22:03:46,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:46,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:46,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:03:46,520 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:46,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:46,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:03:46,524 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:46,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:46,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:03:46,547 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 22:03:46,627 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:46,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880537205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:46,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:46,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 22:03:46,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564821773] [2021-06-05 22:03:46,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:03:46,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:46,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:03:46,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:03:46,628 INFO L87 Difference]: Start difference. First operand 277 states and 605 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:47,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:47,326 INFO L93 Difference]: Finished difference Result 365 states and 751 transitions. [2021-06-05 22:03:47,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:03:47,326 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:47,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:47,326 INFO L225 Difference]: With dead ends: 365 [2021-06-05 22:03:47,327 INFO L226 Difference]: Without dead ends: 336 [2021-06-05 22:03:47,327 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 839.0ms TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:03:47,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-06-05 22:03:47,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 282. [2021-06-05 22:03:47,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.188612099644128) internal successors, (615), 281 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:47,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 615 transitions. [2021-06-05 22:03:47,329 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 615 transitions. Word has length 20 [2021-06-05 22:03:47,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:47,329 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 615 transitions. [2021-06-05 22:03:47,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:47,329 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 615 transitions. [2021-06-05 22:03:47,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:47,329 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:47,329 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:47,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 828 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3891 [2021-06-05 22:03:47,530 INFO L430 AbstractCegarLoop]: === Iteration 834 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:47,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:47,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1248461274, now seen corresponding path program 828 times [2021-06-05 22:03:47,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:47,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175963433] [2021-06-05 22:03:47,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:47,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:47,711 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:47,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:47,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175963433] [2021-06-05 22:03:47,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175963433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:47,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784617157] [2021-06-05 22:03:47,712 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 829 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 829 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:47,739 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:03:47,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:47,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:03:47,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:47,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:47,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:47,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:47,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:47,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:47,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:47,865 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:47,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:47,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:47,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:47,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:03:47,892 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:47,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:47,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:03:47,895 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:47,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:47,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:03:47,916 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 22:03:47,991 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:47,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784617157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:47,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:47,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:03:47,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416784483] [2021-06-05 22:03:47,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:03:47,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:47,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:03:47,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:03:47,992 INFO L87 Difference]: Start difference. First operand 282 states and 615 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:48,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:48,404 INFO L93 Difference]: Finished difference Result 316 states and 680 transitions. [2021-06-05 22:03:48,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:03:48,404 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:48,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:48,405 INFO L225 Difference]: With dead ends: 316 [2021-06-05 22:03:48,405 INFO L226 Difference]: Without dead ends: 309 [2021-06-05 22:03:48,405 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 499.9ms TimeCoverageRelationStatistics Valid=118, Invalid=874, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:03:48,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-06-05 22:03:48,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 282. [2021-06-05 22:03:48,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.188612099644128) internal successors, (615), 281 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:48,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 615 transitions. [2021-06-05 22:03:48,407 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 615 transitions. Word has length 20 [2021-06-05 22:03:48,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:48,407 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 615 transitions. [2021-06-05 22:03:48,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:48,407 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 615 transitions. [2021-06-05 22:03:48,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:48,407 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:48,407 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:48,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3894,829 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:48,621 INFO L430 AbstractCegarLoop]: === Iteration 835 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:48,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:48,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1124274066, now seen corresponding path program 829 times [2021-06-05 22:03:48,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:48,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447501876] [2021-06-05 22:03:48,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:48,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:48,807 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:48,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:48,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447501876] [2021-06-05 22:03:48,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447501876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:48,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255523510] [2021-06-05 22:03:48,807 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 830 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 830 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:48,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:48,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:03:48,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:48,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:48,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:48,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:03:48,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:48,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:48,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:03:48,987 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:49,009 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-06-05 22:03:49,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:49,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:03:49,013 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:49,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:49,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:03:49,020 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:03:49,055 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:49,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255523510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:49,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:49,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 22:03:49,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534040956] [2021-06-05 22:03:49,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:03:49,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:49,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:03:49,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:03:49,056 INFO L87 Difference]: Start difference. First operand 282 states and 615 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:49,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:49,362 INFO L93 Difference]: Finished difference Result 309 states and 663 transitions. [2021-06-05 22:03:49,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:03:49,362 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:49,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:49,363 INFO L225 Difference]: With dead ends: 309 [2021-06-05 22:03:49,363 INFO L226 Difference]: Without dead ends: 296 [2021-06-05 22:03:49,363 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 451.5ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:03:49,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-06-05 22:03:49,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 285. [2021-06-05 22:03:49,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.186619718309859) internal successors, (621), 284 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:49,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 621 transitions. [2021-06-05 22:03:49,365 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 621 transitions. Word has length 20 [2021-06-05 22:03:49,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:49,365 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 621 transitions. [2021-06-05 22:03:49,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:49,365 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 621 transitions. [2021-06-05 22:03:49,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:49,365 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:49,365 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:49,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3897,830 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:49,566 INFO L430 AbstractCegarLoop]: === Iteration 836 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:49,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:49,566 INFO L82 PathProgramCache]: Analyzing trace with hash 11911206, now seen corresponding path program 830 times [2021-06-05 22:03:49,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:49,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13052813] [2021-06-05 22:03:49,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:49,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:49,770 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:49,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:49,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13052813] [2021-06-05 22:03:49,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13052813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:49,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198416046] [2021-06-05 22:03:49,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 831 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 831 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:49,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:03:49,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:49,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:03:49,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:49,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:49,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:49,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:49,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:49,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:49,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:49,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:49,931 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:49,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:49,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:49,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:49,934 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:49,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:49,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:49,937 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:49,992 INFO L628 ElimStorePlain]: treesize reduction 80, result has 44.4 percent of original size [2021-06-05 22:03:49,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:49,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:49,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:03:49,997 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:49,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:49,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:03:50,000 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:50,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:50,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:03:50,027 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 22:03:50,110 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:50,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198416046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:50,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:50,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:03:50,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383992576] [2021-06-05 22:03:50,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:03:50,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:50,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:03:50,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:03:50,110 INFO L87 Difference]: Start difference. First operand 285 states and 621 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:50,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:50,610 INFO L93 Difference]: Finished difference Result 332 states and 699 transitions. [2021-06-05 22:03:50,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:03:50,611 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:50,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:50,611 INFO L225 Difference]: With dead ends: 332 [2021-06-05 22:03:50,611 INFO L226 Difference]: Without dead ends: 313 [2021-06-05 22:03:50,611 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 625.4ms TimeCoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:03:50,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-06-05 22:03:50,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 284. [2021-06-05 22:03:50,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.187279151943463) internal successors, (619), 283 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:50,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 619 transitions. [2021-06-05 22:03:50,613 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 619 transitions. Word has length 20 [2021-06-05 22:03:50,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:50,613 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 619 transitions. [2021-06-05 22:03:50,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:50,613 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 619 transitions. [2021-06-05 22:03:50,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:50,614 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:50,614 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:50,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 831 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3898 [2021-06-05 22:03:50,814 INFO L430 AbstractCegarLoop]: === Iteration 837 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:50,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:50,814 INFO L82 PathProgramCache]: Analyzing trace with hash -2134259554, now seen corresponding path program 831 times [2021-06-05 22:03:50,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:50,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98515586] [2021-06-05 22:03:50,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:50,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:51,013 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:51,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:51,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98515586] [2021-06-05 22:03:51,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98515586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:51,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417900340] [2021-06-05 22:03:51,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 832 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 832 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:51,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:03:51,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:51,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:03:51,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:51,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:51,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:51,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:51,182 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:51,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:51,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:51,186 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:51,251 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-06-05 22:03:51,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:51,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:03:51,255 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:51,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:51,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:51,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:51,282 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:51,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:51,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:51,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:03:51,308 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:51,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:51,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:03:51,330 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:03:51,409 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:51,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417900340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:51,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:51,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:03:51,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181559636] [2021-06-05 22:03:51,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:03:51,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:51,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:03:51,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:03:51,410 INFO L87 Difference]: Start difference. First operand 284 states and 619 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:52,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:52,038 INFO L93 Difference]: Finished difference Result 344 states and 723 transitions. [2021-06-05 22:03:52,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:03:52,038 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:52,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:52,039 INFO L225 Difference]: With dead ends: 344 [2021-06-05 22:03:52,039 INFO L226 Difference]: Without dead ends: 322 [2021-06-05 22:03:52,039 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 754.6ms TimeCoverageRelationStatistics Valid=150, Invalid=1040, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:03:52,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-06-05 22:03:52,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 281. [2021-06-05 22:03:52,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.1892857142857145) internal successors, (613), 280 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:52,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 613 transitions. [2021-06-05 22:03:52,041 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 613 transitions. Word has length 20 [2021-06-05 22:03:52,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:52,041 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 613 transitions. [2021-06-05 22:03:52,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:52,041 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 613 transitions. [2021-06-05 22:03:52,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:52,041 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:52,041 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:52,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3901,832 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:52,242 INFO L430 AbstractCegarLoop]: === Iteration 838 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:52,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:52,242 INFO L82 PathProgramCache]: Analyzing trace with hash 53923622, now seen corresponding path program 832 times [2021-06-05 22:03:52,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:52,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762732521] [2021-06-05 22:03:52,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:52,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:52,454 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:52,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:52,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762732521] [2021-06-05 22:03:52,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762732521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:52,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267788344] [2021-06-05 22:03:52,455 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 833 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 833 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:52,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:03:52,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:52,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:03:52,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:52,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:52,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:52,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:52,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:52,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:52,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:52,685 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:52,747 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-06-05 22:03:52,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:52,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:03:52,752 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:52,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:52,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:52,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:52,779 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:52,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:52,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:52,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:03:52,805 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:52,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:52,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:03:52,827 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:03:52,909 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:52,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267788344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:52,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:52,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:03:52,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619645820] [2021-06-05 22:03:52,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:03:52,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:52,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:03:52,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:03:52,909 INFO L87 Difference]: Start difference. First operand 281 states and 613 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:53,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:53,489 INFO L93 Difference]: Finished difference Result 355 states and 749 transitions. [2021-06-05 22:03:53,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:03:53,490 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:53,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:53,490 INFO L225 Difference]: With dead ends: 355 [2021-06-05 22:03:53,490 INFO L226 Difference]: Without dead ends: 336 [2021-06-05 22:03:53,490 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 758.4ms TimeCoverageRelationStatistics Valid=136, Invalid=986, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:03:53,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-06-05 22:03:53,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 280. [2021-06-05 22:03:53,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.1899641577060933) internal successors, (611), 279 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:53,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 611 transitions. [2021-06-05 22:03:53,492 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 611 transitions. Word has length 20 [2021-06-05 22:03:53,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:53,492 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 611 transitions. [2021-06-05 22:03:53,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:53,492 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 611 transitions. [2021-06-05 22:03:53,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:53,493 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:53,493 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:53,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3906,833 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:53,693 INFO L430 AbstractCegarLoop]: === Iteration 839 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:53,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:53,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1480750326, now seen corresponding path program 833 times [2021-06-05 22:03:53,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:53,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859274273] [2021-06-05 22:03:53,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:53,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:53,881 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:53,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:53,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859274273] [2021-06-05 22:03:53,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859274273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:53,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570707864] [2021-06-05 22:03:53,881 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 834 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 834 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:53,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:03:53,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:53,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:03:53,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:54,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:54,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:54,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:03:54,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:54,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:54,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:03:54,066 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:54,088 INFO L628 ElimStorePlain]: treesize reduction 42, result has 44.0 percent of original size [2021-06-05 22:03:54,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:54,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:03:54,091 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:54,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:54,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:03:54,098 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:03:54,134 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:54,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570707864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:54,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:54,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 22:03:54,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930537184] [2021-06-05 22:03:54,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:03:54,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:54,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:03:54,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:03:54,135 INFO L87 Difference]: Start difference. First operand 280 states and 611 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:54,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:54,543 INFO L93 Difference]: Finished difference Result 319 states and 680 transitions. [2021-06-05 22:03:54,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:03:54,543 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:54,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:54,544 INFO L225 Difference]: With dead ends: 319 [2021-06-05 22:03:54,544 INFO L226 Difference]: Without dead ends: 300 [2021-06-05 22:03:54,544 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 452.9ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:03:54,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-06-05 22:03:54,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 282. [2021-06-05 22:03:54,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.188612099644128) internal successors, (615), 281 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:54,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 615 transitions. [2021-06-05 22:03:54,549 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 615 transitions. Word has length 20 [2021-06-05 22:03:54,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:54,549 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 615 transitions. [2021-06-05 22:03:54,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:54,549 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 615 transitions. [2021-06-05 22:03:54,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:54,549 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:54,550 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:54,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3911,834 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:54,750 INFO L430 AbstractCegarLoop]: === Iteration 840 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:54,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:54,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1678031698, now seen corresponding path program 834 times [2021-06-05 22:03:54,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:54,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849470434] [2021-06-05 22:03:54,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:54,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:54,913 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:54,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:54,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849470434] [2021-06-05 22:03:54,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849470434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:54,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536520016] [2021-06-05 22:03:54,914 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 835 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 835 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:54,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:03:54,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:54,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:03:54,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:55,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:55,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:55,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:55,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:55,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:55,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:55,064 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:55,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:55,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:55,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:55,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:03:55,090 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:55,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:55,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:03:55,094 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:55,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:55,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:03:55,116 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 22:03:55,200 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:55,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536520016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:55,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:55,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 22:03:55,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117446928] [2021-06-05 22:03:55,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:03:55,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:55,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:03:55,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:03:55,201 INFO L87 Difference]: Start difference. First operand 282 states and 615 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:55,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:55,499 INFO L93 Difference]: Finished difference Result 315 states and 678 transitions. [2021-06-05 22:03:55,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:03:55,499 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:55,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:55,500 INFO L225 Difference]: With dead ends: 315 [2021-06-05 22:03:55,500 INFO L226 Difference]: Without dead ends: 308 [2021-06-05 22:03:55,500 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 423.1ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:03:55,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-06-05 22:03:55,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 281. [2021-06-05 22:03:55,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.1892857142857145) internal successors, (613), 280 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:55,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 613 transitions. [2021-06-05 22:03:55,502 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 613 transitions. Word has length 20 [2021-06-05 22:03:55,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:55,502 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 613 transitions. [2021-06-05 22:03:55,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:55,502 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 613 transitions. [2021-06-05 22:03:55,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:55,503 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:55,503 INFO L554 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:55,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3912,835 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:55,703 INFO L430 AbstractCegarLoop]: === Iteration 841 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:55,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:55,703 INFO L82 PathProgramCache]: Analyzing trace with hash 694696306, now seen corresponding path program 835 times [2021-06-05 22:03:55,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:55,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776853085] [2021-06-05 22:03:55,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:55,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:55,779 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:03:55,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:55,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776853085] [2021-06-05 22:03:55,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776853085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:55,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077876271] [2021-06-05 22:03:55,779 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 836 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 836 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:55,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:55,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:03:55,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:55,965 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:03:55,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077876271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:55,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:55,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:03:55,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229473292] [2021-06-05 22:03:55,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:03:55,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:55,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:03:55,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:03:55,965 INFO L87 Difference]: Start difference. First operand 281 states and 613 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:56,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:56,469 INFO L93 Difference]: Finished difference Result 364 states and 785 transitions. [2021-06-05 22:03:56,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:03:56,469 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:56,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:56,470 INFO L225 Difference]: With dead ends: 364 [2021-06-05 22:03:56,470 INFO L226 Difference]: Without dead ends: 364 [2021-06-05 22:03:56,470 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 503.3ms TimeCoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:03:56,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-06-05 22:03:56,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 281. [2021-06-05 22:03:56,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.1892857142857145) internal successors, (613), 280 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:56,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 613 transitions. [2021-06-05 22:03:56,472 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 613 transitions. Word has length 20 [2021-06-05 22:03:56,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:56,472 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 613 transitions. [2021-06-05 22:03:56,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:56,472 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 613 transitions. [2021-06-05 22:03:56,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:56,472 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:56,472 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:56,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 836 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3917 [2021-06-05 22:03:56,673 INFO L430 AbstractCegarLoop]: === Iteration 842 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:56,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:56,673 INFO L82 PathProgramCache]: Analyzing trace with hash 470764838, now seen corresponding path program 836 times [2021-06-05 22:03:56,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:56,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603640856] [2021-06-05 22:03:56,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:56,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:56,891 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:56,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:56,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603640856] [2021-06-05 22:03:56,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603640856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:56,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063340907] [2021-06-05 22:03:56,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 837 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 837 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:56,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:03:56,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:56,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:03:56,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:57,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:57,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:57,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:57,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:57,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:57,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:57,071 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:57,132 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-06-05 22:03:57,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:57,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:03:57,136 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:57,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:57,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:57,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:57,164 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:57,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:57,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:57,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:03:57,190 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:57,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:57,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:03:57,212 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:03:57,294 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:57,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063340907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:57,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:57,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:03:57,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945359260] [2021-06-05 22:03:57,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:03:57,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:57,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:03:57,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:03:57,295 INFO L87 Difference]: Start difference. First operand 281 states and 613 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:57,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:57,901 INFO L93 Difference]: Finished difference Result 350 states and 739 transitions. [2021-06-05 22:03:57,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:03:57,901 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:57,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:57,902 INFO L225 Difference]: With dead ends: 350 [2021-06-05 22:03:57,902 INFO L226 Difference]: Without dead ends: 331 [2021-06-05 22:03:57,902 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 745.4ms TimeCoverageRelationStatistics Valid=131, Invalid=925, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:03:57,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-06-05 22:03:57,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 280. [2021-06-05 22:03:57,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.1899641577060933) internal successors, (611), 279 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:57,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 611 transitions. [2021-06-05 22:03:57,904 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 611 transitions. Word has length 20 [2021-06-05 22:03:57,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:57,904 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 611 transitions. [2021-06-05 22:03:57,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:57,904 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 611 transitions. [2021-06-05 22:03:57,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:57,905 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:57,905 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:58,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 837 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3927 [2021-06-05 22:03:58,105 INFO L430 AbstractCegarLoop]: === Iteration 843 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:58,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:58,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1636019282, now seen corresponding path program 837 times [2021-06-05 22:03:58,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:58,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064438655] [2021-06-05 22:03:58,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:58,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:03:58,329 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:58,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:03:58,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064438655] [2021-06-05 22:03:58,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064438655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:58,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916243245] [2021-06-05 22:03:58,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 838 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 838 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:03:58,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:03:58,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:03:58,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:03:58,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:03:58,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:58,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:58,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:58,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:58,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:58,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:58,553 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:58,613 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-06-05 22:03:58,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:58,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:03:58,617 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:58,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:58,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:58,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:03:58,644 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:03:58,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:58,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:03:58,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:03:58,670 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:03:58,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:03:58,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:03:58,692 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:03:58,775 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:03:58,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916243245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:03:58,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:03:58,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:03:58,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365972648] [2021-06-05 22:03:58,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:03:58,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:03:58,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:03:58,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:03:58,776 INFO L87 Difference]: Start difference. First operand 280 states and 611 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:59,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:03:59,771 INFO L93 Difference]: Finished difference Result 396 states and 812 transitions. [2021-06-05 22:03:59,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:03:59,771 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:03:59,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:03:59,771 INFO L225 Difference]: With dead ends: 396 [2021-06-05 22:03:59,771 INFO L226 Difference]: Without dead ends: 358 [2021-06-05 22:03:59,772 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1094.9ms TimeCoverageRelationStatistics Valid=170, Invalid=1312, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:03:59,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-06-05 22:03:59,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 279. [2021-06-05 22:03:59,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 2.1906474820143886) internal successors, (609), 278 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:59,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 609 transitions. [2021-06-05 22:03:59,774 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 609 transitions. Word has length 20 [2021-06-05 22:03:59,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:03:59,774 INFO L482 AbstractCegarLoop]: Abstraction has 279 states and 609 transitions. [2021-06-05 22:03:59,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:03:59,774 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 609 transitions. [2021-06-05 22:03:59,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:03:59,774 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:03:59,774 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:03:59,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 838 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3932 [2021-06-05 22:03:59,975 INFO L430 AbstractCegarLoop]: === Iteration 844 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:03:59,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:03:59,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1773149734, now seen corresponding path program 838 times [2021-06-05 22:03:59,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:03:59,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311005852] [2021-06-05 22:03:59,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:03:59,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:00,205 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:00,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:00,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311005852] [2021-06-05 22:04:00,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311005852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:00,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840455958] [2021-06-05 22:04:00,205 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 839 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 839 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:00,230 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:04:00,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:00,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:04:00,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:00,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:00,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:00,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:00,448 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:00,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:00,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:00,451 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:00,515 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-06-05 22:04:00,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:00,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:04:00,519 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:00,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:00,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:00,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:00,546 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:00,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:00,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:00,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:04:00,571 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:00,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:00,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:04:00,593 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:04:00,699 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:00,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840455958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:00,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:00,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:04:00,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051017499] [2021-06-05 22:04:00,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:04:00,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:00,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:04:00,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:04:00,699 INFO L87 Difference]: Start difference. First operand 279 states and 609 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:01,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:01,325 INFO L93 Difference]: Finished difference Result 360 states and 759 transitions. [2021-06-05 22:04:01,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:04:01,325 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:01,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:01,326 INFO L225 Difference]: With dead ends: 360 [2021-06-05 22:04:01,326 INFO L226 Difference]: Without dead ends: 341 [2021-06-05 22:04:01,326 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 809.2ms TimeCoverageRelationStatistics Valid=124, Invalid=998, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:04:01,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-06-05 22:04:01,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 278. [2021-06-05 22:04:01,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.191335740072202) internal successors, (607), 277 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:01,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 607 transitions. [2021-06-05 22:04:01,328 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 607 transitions. Word has length 20 [2021-06-05 22:04:01,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:01,328 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 607 transitions. [2021-06-05 22:04:01,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:01,328 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 607 transitions. [2021-06-05 22:04:01,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:01,328 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:01,328 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:01,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3937,839 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:01,529 INFO L430 AbstractCegarLoop]: === Iteration 845 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:01,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:01,529 INFO L82 PathProgramCache]: Analyzing trace with hash 468810414, now seen corresponding path program 839 times [2021-06-05 22:04:01,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:01,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33561630] [2021-06-05 22:04:01,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:01,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:01,714 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:01,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:01,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33561630] [2021-06-05 22:04:01,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33561630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:01,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737191237] [2021-06-05 22:04:01,714 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 840 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 840 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:01,740 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:04:01,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:01,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:04:01,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:01,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:01,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:01,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:04:01,910 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:01,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:01,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:04:01,913 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:01,935 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-06-05 22:04:01,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:01,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:04:01,938 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:01,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:01,945 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:04:01,945 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:04:01,983 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:01,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737191237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:01,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:01,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 22:04:01,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357521540] [2021-06-05 22:04:01,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:04:01,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:01,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:04:01,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:04:01,984 INFO L87 Difference]: Start difference. First operand 278 states and 607 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:02,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:02,398 INFO L93 Difference]: Finished difference Result 317 states and 669 transitions. [2021-06-05 22:04:02,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:04:02,399 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:02,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:02,399 INFO L225 Difference]: With dead ends: 317 [2021-06-05 22:04:02,399 INFO L226 Difference]: Without dead ends: 292 [2021-06-05 22:04:02,399 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 487.4ms TimeCoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:04:02,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-06-05 22:04:02,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 282. [2021-06-05 22:04:02,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.185053380782918) internal successors, (614), 281 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:02,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 614 transitions. [2021-06-05 22:04:02,401 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 614 transitions. Word has length 20 [2021-06-05 22:04:02,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:02,401 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 614 transitions. [2021-06-05 22:04:02,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:02,401 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 614 transitions. [2021-06-05 22:04:02,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:02,401 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:02,402 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:02,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3942,840 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:02,602 INFO L430 AbstractCegarLoop]: === Iteration 846 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:02,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:02,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1330815478, now seen corresponding path program 840 times [2021-06-05 22:04:02,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:02,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829181016] [2021-06-05 22:04:02,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:02,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:02,795 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:02,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:02,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829181016] [2021-06-05 22:04:02,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829181016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:02,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838487330] [2021-06-05 22:04:02,795 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 841 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 841 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:02,821 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:04:02,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:02,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:04:02,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:02,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:02,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:02,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:02,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:02,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:02,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:02,978 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:02,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:02,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:02,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:02,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:04:03,000 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:03,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:03,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:04:03,004 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:03,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:03,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:04:03,022 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:29 [2021-06-05 22:04:03,073 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:03,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838487330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:03,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:03,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 22:04:03,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656476170] [2021-06-05 22:04:03,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:04:03,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:03,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:04:03,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:04:03,073 INFO L87 Difference]: Start difference. First operand 282 states and 614 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:03,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:03,784 INFO L93 Difference]: Finished difference Result 318 states and 681 transitions. [2021-06-05 22:04:03,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:04:03,785 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:03,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:03,785 INFO L225 Difference]: With dead ends: 318 [2021-06-05 22:04:03,785 INFO L226 Difference]: Without dead ends: 305 [2021-06-05 22:04:03,785 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 703.2ms TimeCoverageRelationStatistics Valid=110, Invalid=1080, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:04:03,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-06-05 22:04:03,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 283. [2021-06-05 22:04:03,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.1843971631205674) internal successors, (616), 282 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:03,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 616 transitions. [2021-06-05 22:04:03,787 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 616 transitions. Word has length 20 [2021-06-05 22:04:03,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:03,787 INFO L482 AbstractCegarLoop]: Abstraction has 283 states and 616 transitions. [2021-06-05 22:04:03,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:03,787 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 616 transitions. [2021-06-05 22:04:03,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:03,787 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:03,788 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:03,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3943,841 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:03,988 INFO L430 AbstractCegarLoop]: === Iteration 847 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:03,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:03,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1827966546, now seen corresponding path program 841 times [2021-06-05 22:04:03,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:03,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342730030] [2021-06-05 22:04:03,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:03,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:04,188 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:04,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:04,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342730030] [2021-06-05 22:04:04,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342730030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:04,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465399858] [2021-06-05 22:04:04,189 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 842 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 842 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:04,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:04,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:04:04,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:04,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:04,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:04,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:04,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:04,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:04,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:04,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:04,366 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:04,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:04,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:04,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:04,370 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:04,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:04,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:04,373 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:04,429 INFO L628 ElimStorePlain]: treesize reduction 83, result has 43.5 percent of original size [2021-06-05 22:04:04,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:04,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:04,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:04:04,433 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:04,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:04,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:04:04,437 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:04,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:04,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:04:04,461 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 22:04:04,552 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:04,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465399858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:04,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:04,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:04:04,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229957177] [2021-06-05 22:04:04,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:04:04,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:04,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:04:04,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:04:04,553 INFO L87 Difference]: Start difference. First operand 283 states and 616 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:05,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:05,318 INFO L93 Difference]: Finished difference Result 347 states and 723 transitions. [2021-06-05 22:04:05,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:04:05,319 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:05,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:05,319 INFO L225 Difference]: With dead ends: 347 [2021-06-05 22:04:05,319 INFO L226 Difference]: Without dead ends: 323 [2021-06-05 22:04:05,319 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 856.2ms TimeCoverageRelationStatistics Valid=129, Invalid=1203, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:04:05,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-06-05 22:04:05,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 280. [2021-06-05 22:04:05,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.186379928315412) internal successors, (610), 279 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:05,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 610 transitions. [2021-06-05 22:04:05,321 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 610 transitions. Word has length 20 [2021-06-05 22:04:05,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:05,321 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 610 transitions. [2021-06-05 22:04:05,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:05,321 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 610 transitions. [2021-06-05 22:04:05,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:05,322 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:05,322 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:05,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 842 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3946 [2021-06-05 22:04:05,522 INFO L430 AbstractCegarLoop]: === Iteration 848 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:05,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:05,522 INFO L82 PathProgramCache]: Analyzing trace with hash -775968642, now seen corresponding path program 842 times [2021-06-05 22:04:05,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:05,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863135990] [2021-06-05 22:04:05,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:05,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:05,754 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:05,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:05,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863135990] [2021-06-05 22:04:05,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863135990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:05,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300073405] [2021-06-05 22:04:05,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 843 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 843 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:05,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:04:05,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:05,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:04:05,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:05,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:05,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:05,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:04:05,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:05,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:05,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:04:05,938 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:05,960 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-06-05 22:04:05,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:05,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:04:05,963 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:05,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:05,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:04:05,970 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:04:06,009 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:06,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300073405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:06,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:06,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:04:06,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198349763] [2021-06-05 22:04:06,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:04:06,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:06,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:04:06,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:04:06,010 INFO L87 Difference]: Start difference. First operand 280 states and 610 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:06,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:06,352 INFO L93 Difference]: Finished difference Result 304 states and 649 transitions. [2021-06-05 22:04:06,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:04:06,353 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:06,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:06,353 INFO L225 Difference]: With dead ends: 304 [2021-06-05 22:04:06,353 INFO L226 Difference]: Without dead ends: 291 [2021-06-05 22:04:06,353 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 529.1ms TimeCoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:04:06,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-06-05 22:04:06,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 282. [2021-06-05 22:04:06,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.185053380782918) internal successors, (614), 281 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:06,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 614 transitions. [2021-06-05 22:04:06,355 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 614 transitions. Word has length 20 [2021-06-05 22:04:06,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:06,355 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 614 transitions. [2021-06-05 22:04:06,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:06,355 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 614 transitions. [2021-06-05 22:04:06,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:06,356 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:06,356 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:06,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3949,843 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:06,565 INFO L430 AbstractCegarLoop]: === Iteration 849 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:06,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:06,565 INFO L82 PathProgramCache]: Analyzing trace with hash 360216630, now seen corresponding path program 843 times [2021-06-05 22:04:06,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:06,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995945039] [2021-06-05 22:04:06,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:06,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:06,766 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:06,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:06,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995945039] [2021-06-05 22:04:06,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995945039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:06,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570845836] [2021-06-05 22:04:06,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 844 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 844 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:06,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:04:06,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:06,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:04:06,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:06,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:06,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:06,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:06,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:06,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:06,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:06,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:06,935 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:06,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:06,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:06,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:06,939 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:06,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:06,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:06,942 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:07,013 INFO L628 ElimStorePlain]: treesize reduction 74, result has 45.2 percent of original size [2021-06-05 22:04:07,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:07,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:07,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:04:07,017 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:07,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:07,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:04:07,020 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:07,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:07,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:04:07,041 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:161, output treesize:32 [2021-06-05 22:04:07,126 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:07,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570845836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:07,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:07,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 22:04:07,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228942592] [2021-06-05 22:04:07,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:04:07,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:07,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:04:07,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:04:07,127 INFO L87 Difference]: Start difference. First operand 282 states and 614 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:08,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:08,050 INFO L93 Difference]: Finished difference Result 373 states and 771 transitions. [2021-06-05 22:04:08,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:04:08,051 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:08,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:08,051 INFO L225 Difference]: With dead ends: 373 [2021-06-05 22:04:08,051 INFO L226 Difference]: Without dead ends: 347 [2021-06-05 22:04:08,051 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 998.0ms TimeCoverageRelationStatistics Valid=159, Invalid=1401, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:04:08,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-06-05 22:04:08,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 281. [2021-06-05 22:04:08,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.1857142857142855) internal successors, (612), 280 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:08,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 612 transitions. [2021-06-05 22:04:08,054 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 612 transitions. Word has length 20 [2021-06-05 22:04:08,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:08,054 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 612 transitions. [2021-06-05 22:04:08,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:08,054 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 612 transitions. [2021-06-05 22:04:08,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:08,054 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:08,054 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:08,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3950,844 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:08,254 INFO L430 AbstractCegarLoop]: === Iteration 850 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:08,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:08,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1785954130, now seen corresponding path program 844 times [2021-06-05 22:04:08,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:08,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222056740] [2021-06-05 22:04:08,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:08,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:08,437 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:08,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:08,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222056740] [2021-06-05 22:04:08,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222056740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:08,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24862346] [2021-06-05 22:04:08,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 845 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 845 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:08,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:04:08,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:08,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:04:08,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:08,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:08,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:08,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:08,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:08,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:08,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:08,614 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:08,679 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-06-05 22:04:08,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:08,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:04:08,684 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:08,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:08,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:08,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:08,712 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:08,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:08,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:08,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:04:08,739 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:08,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:08,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:04:08,761 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:04:08,840 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:08,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24862346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:08,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:08,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:04:08,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568353686] [2021-06-05 22:04:08,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:04:08,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:08,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:04:08,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:04:08,841 INFO L87 Difference]: Start difference. First operand 281 states and 612 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:09,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:09,372 INFO L93 Difference]: Finished difference Result 341 states and 721 transitions. [2021-06-05 22:04:09,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:04:09,373 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:09,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:09,373 INFO L225 Difference]: With dead ends: 341 [2021-06-05 22:04:09,373 INFO L226 Difference]: Without dead ends: 317 [2021-06-05 22:04:09,373 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 574.8ms TimeCoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:04:09,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-06-05 22:04:09,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 278. [2021-06-05 22:04:09,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.191335740072202) internal successors, (607), 277 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:09,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 607 transitions. [2021-06-05 22:04:09,375 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 607 transitions. Word has length 20 [2021-06-05 22:04:09,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:09,375 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 607 transitions. [2021-06-05 22:04:09,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:09,376 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 607 transitions. [2021-06-05 22:04:09,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:09,376 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:09,376 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:09,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 845 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3954 [2021-06-05 22:04:09,576 INFO L430 AbstractCegarLoop]: === Iteration 851 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:09,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:09,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1661766922, now seen corresponding path program 845 times [2021-06-05 22:04:09,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:09,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663928666] [2021-06-05 22:04:09,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:09,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:09,774 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:09,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:09,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663928666] [2021-06-05 22:04:09,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663928666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:09,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032319346] [2021-06-05 22:04:09,774 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 846 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 846 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:09,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:04:09,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:09,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:04:09,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:09,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:09,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:09,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:04:09,967 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:09,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:09,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:04:09,970 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:09,993 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-06-05 22:04:09,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:09,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:04:09,996 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:10,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:10,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:04:10,003 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:04:10,041 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:10,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032319346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:10,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:10,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 22:04:10,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784360410] [2021-06-05 22:04:10,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:04:10,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:10,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:04:10,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:04:10,042 INFO L87 Difference]: Start difference. First operand 278 states and 607 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:10,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:10,399 INFO L93 Difference]: Finished difference Result 317 states and 676 transitions. [2021-06-05 22:04:10,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:04:10,399 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:10,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:10,399 INFO L225 Difference]: With dead ends: 317 [2021-06-05 22:04:10,399 INFO L226 Difference]: Without dead ends: 298 [2021-06-05 22:04:10,399 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 493.8ms TimeCoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:04:10,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-06-05 22:04:10,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 281. [2021-06-05 22:04:10,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.1892857142857145) internal successors, (613), 280 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:10,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 613 transitions. [2021-06-05 22:04:10,402 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 613 transitions. Word has length 20 [2021-06-05 22:04:10,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:10,402 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 613 transitions. [2021-06-05 22:04:10,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:10,402 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 613 transitions. [2021-06-05 22:04:10,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:10,402 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:10,402 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:10,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 846 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3959 [2021-06-05 22:04:10,602 INFO L430 AbstractCegarLoop]: === Iteration 852 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:10,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:10,603 INFO L82 PathProgramCache]: Analyzing trace with hash -525581650, now seen corresponding path program 846 times [2021-06-05 22:04:10,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:10,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664415912] [2021-06-05 22:04:10,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:10,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:10,812 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:10,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:10,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664415912] [2021-06-05 22:04:10,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664415912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:10,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259861323] [2021-06-05 22:04:10,812 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 847 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 847 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:10,840 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:04:10,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:10,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:04:10,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:10,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:10,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:10,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:10,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:10,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:10,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:10,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:10,973 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:10,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:10,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:10,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:10,977 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:10,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:10,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:10,980 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:11,034 INFO L628 ElimStorePlain]: treesize reduction 80, result has 46.7 percent of original size [2021-06-05 22:04:11,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:11,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:11,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:04:11,038 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:11,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:11,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:04:11,041 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:11,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:11,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:04:11,065 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 22:04:11,145 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:11,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259861323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:11,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:11,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:04:11,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013203967] [2021-06-05 22:04:11,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:04:11,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:11,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:04:11,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:04:11,146 INFO L87 Difference]: Start difference. First operand 281 states and 613 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:11,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:11,671 INFO L93 Difference]: Finished difference Result 338 states and 708 transitions. [2021-06-05 22:04:11,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:04:11,671 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:11,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:11,671 INFO L225 Difference]: With dead ends: 338 [2021-06-05 22:04:11,671 INFO L226 Difference]: Without dead ends: 316 [2021-06-05 22:04:11,672 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 645.2ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:04:11,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-06-05 22:04:11,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 277. [2021-06-05 22:04:11,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 2.1920289855072466) internal successors, (605), 276 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:11,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 605 transitions. [2021-06-05 22:04:11,674 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 605 transitions. Word has length 20 [2021-06-05 22:04:11,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:11,674 INFO L482 AbstractCegarLoop]: Abstraction has 277 states and 605 transitions. [2021-06-05 22:04:11,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:11,674 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 605 transitions. [2021-06-05 22:04:11,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:11,674 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:11,674 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:11,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3960,847 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:11,874 INFO L430 AbstractCegarLoop]: === Iteration 853 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:11,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:11,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1623214886, now seen corresponding path program 847 times [2021-06-05 22:04:11,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:11,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067402796] [2021-06-05 22:04:11,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:11,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:12,080 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:12,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:12,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067402796] [2021-06-05 22:04:12,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067402796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:12,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150520216] [2021-06-05 22:04:12,080 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 848 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 848 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:12,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:12,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:04:12,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:12,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:12,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:12,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:12,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:12,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:12,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:12,254 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:12,314 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-06-05 22:04:12,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:12,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:04:12,318 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:12,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:12,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:12,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:12,345 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:12,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:12,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:12,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:04:12,371 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:12,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:12,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:04:12,393 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:04:12,474 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:12,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150520216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:12,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:12,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:04:12,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320198806] [2021-06-05 22:04:12,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:04:12,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:12,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:04:12,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:04:12,474 INFO L87 Difference]: Start difference. First operand 277 states and 605 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:13,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:13,108 INFO L93 Difference]: Finished difference Result 342 states and 723 transitions. [2021-06-05 22:04:13,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:04:13,108 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:13,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:13,108 INFO L225 Difference]: With dead ends: 342 [2021-06-05 22:04:13,108 INFO L226 Difference]: Without dead ends: 323 [2021-06-05 22:04:13,109 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 791.1ms TimeCoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:04:13,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-06-05 22:04:13,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 276. [2021-06-05 22:04:13,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.192727272727273) internal successors, (603), 275 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:13,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 603 transitions. [2021-06-05 22:04:13,111 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 603 transitions. Word has length 20 [2021-06-05 22:04:13,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:13,111 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 603 transitions. [2021-06-05 22:04:13,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:13,111 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 603 transitions. [2021-06-05 22:04:13,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:13,111 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:13,111 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:13,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3963,848 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:13,312 INFO L430 AbstractCegarLoop]: === Iteration 854 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:13,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:13,312 INFO L82 PathProgramCache]: Analyzing trace with hash -483569234, now seen corresponding path program 848 times [2021-06-05 22:04:13,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:13,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746601532] [2021-06-05 22:04:13,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:13,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:13,525 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:13,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:13,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746601532] [2021-06-05 22:04:13,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746601532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:13,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839255820] [2021-06-05 22:04:13,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 849 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 849 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:13,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:04:13,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:13,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:04:13,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:13,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:13,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:13,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:13,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:13,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:13,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:13,736 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:13,799 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-06-05 22:04:13,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:13,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:13,802 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:13,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:13,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:13,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:04:13,829 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:13,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:13,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:13,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:04:13,855 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:13,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:13,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:04:13,877 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:04:13,960 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:13,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839255820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:13,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:13,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:04:13,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530650389] [2021-06-05 22:04:13,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:04:13,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:13,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:04:13,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:04:13,961 INFO L87 Difference]: Start difference. First operand 276 states and 603 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:14,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:14,637 INFO L93 Difference]: Finished difference Result 350 states and 739 transitions. [2021-06-05 22:04:14,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:04:14,637 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:14,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:14,638 INFO L225 Difference]: With dead ends: 350 [2021-06-05 22:04:14,638 INFO L226 Difference]: Without dead ends: 331 [2021-06-05 22:04:14,638 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 797.5ms TimeCoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:04:14,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-06-05 22:04:14,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 274. [2021-06-05 22:04:14,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.1941391941391943) internal successors, (599), 273 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:14,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 599 transitions. [2021-06-05 22:04:14,640 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 599 transitions. Word has length 20 [2021-06-05 22:04:14,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:14,640 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 599 transitions. [2021-06-05 22:04:14,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:14,640 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 599 transitions. [2021-06-05 22:04:14,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:14,640 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:14,640 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:14,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 849 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3968 [2021-06-05 22:04:14,841 INFO L430 AbstractCegarLoop]: === Iteration 855 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:14,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:14,841 INFO L82 PathProgramCache]: Analyzing trace with hash 943257470, now seen corresponding path program 849 times [2021-06-05 22:04:14,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:14,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496037054] [2021-06-05 22:04:14,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:14,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:14,997 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:14,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:14,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496037054] [2021-06-05 22:04:14,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496037054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:14,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204196235] [2021-06-05 22:04:14,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 850 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 850 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:15,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:04:15,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:15,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:04:15,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:15,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:15,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:15,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:15,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:15,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:15,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:15,173 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:15,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:15,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:15,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:15,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:04:15,196 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:15,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:15,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:04:15,199 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:15,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:15,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:04:15,218 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:29 [2021-06-05 22:04:15,271 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:15,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204196235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:15,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:15,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:04:15,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78807142] [2021-06-05 22:04:15,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:04:15,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:15,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:04:15,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:04:15,272 INFO L87 Difference]: Start difference. First operand 274 states and 599 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:15,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:15,779 INFO L93 Difference]: Finished difference Result 309 states and 664 transitions. [2021-06-05 22:04:15,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:04:15,779 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:15,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:15,779 INFO L225 Difference]: With dead ends: 309 [2021-06-05 22:04:15,779 INFO L226 Difference]: Without dead ends: 296 [2021-06-05 22:04:15,779 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 492.7ms TimeCoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:04:15,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-06-05 22:04:15,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 278. [2021-06-05 22:04:15,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.191335740072202) internal successors, (607), 277 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:15,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 607 transitions. [2021-06-05 22:04:15,781 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 607 transitions. Word has length 20 [2021-06-05 22:04:15,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:15,782 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 607 transitions. [2021-06-05 22:04:15,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:15,782 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 607 transitions. [2021-06-05 22:04:15,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:15,782 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:15,782 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:15,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3973,850 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:15,982 INFO L430 AbstractCegarLoop]: === Iteration 856 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:15,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:15,983 INFO L82 PathProgramCache]: Analyzing trace with hash 2079442742, now seen corresponding path program 850 times [2021-06-05 22:04:15,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:15,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368442298] [2021-06-05 22:04:15,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:15,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:16,137 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:16,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:16,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368442298] [2021-06-05 22:04:16,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368442298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:16,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290741118] [2021-06-05 22:04:16,137 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 851 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 851 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:16,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:04:16,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:16,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:04:16,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:16,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:16,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:16,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:16,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:16,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:16,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:16,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:16,293 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:16,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:16,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:16,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:16,296 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:16,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:16,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:16,299 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:16,357 INFO L628 ElimStorePlain]: treesize reduction 80, result has 44.4 percent of original size [2021-06-05 22:04:16,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:16,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:16,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:04:16,361 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:16,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:16,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:04:16,365 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:16,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:16,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:04:16,389 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 22:04:16,463 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:16,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290741118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:16,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:16,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 22:04:16,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621507740] [2021-06-05 22:04:16,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:04:16,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:16,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:04:16,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:04:16,464 INFO L87 Difference]: Start difference. First operand 278 states and 607 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:16,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:16,926 INFO L93 Difference]: Finished difference Result 336 states and 702 transitions. [2021-06-05 22:04:16,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:04:16,926 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:16,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:16,926 INFO L225 Difference]: With dead ends: 336 [2021-06-05 22:04:16,926 INFO L226 Difference]: Without dead ends: 312 [2021-06-05 22:04:16,926 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 451.3ms TimeCoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:04:16,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-06-05 22:04:16,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 275. [2021-06-05 22:04:16,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.1934306569343067) internal successors, (601), 274 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:16,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 601 transitions. [2021-06-05 22:04:16,929 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 601 transitions. Word has length 20 [2021-06-05 22:04:16,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:16,929 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 601 transitions. [2021-06-05 22:04:16,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:16,929 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 601 transitions. [2021-06-05 22:04:16,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:16,929 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:16,929 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:17,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3976,851 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:17,133 INFO L430 AbstractCegarLoop]: === Iteration 857 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:17,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:17,133 INFO L82 PathProgramCache]: Analyzing trace with hash -66728018, now seen corresponding path program 851 times [2021-06-05 22:04:17,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:17,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410591525] [2021-06-05 22:04:17,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:17,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:17,348 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:17,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:17,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410591525] [2021-06-05 22:04:17,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410591525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:17,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234292346] [2021-06-05 22:04:17,349 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 852 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 852 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:17,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:04:17,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:17,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:04:17,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:17,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:17,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:17,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:17,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:17,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:17,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:17,530 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:17,591 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-06-05 22:04:17,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:17,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:17,594 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:17,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:17,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:17,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:04:17,620 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:17,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:17,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:17,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:04:17,646 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:17,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:17,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:04:17,671 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:04:17,753 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:17,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234292346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:17,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:17,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:04:17,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679430859] [2021-06-05 22:04:17,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:04:17,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:17,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:04:17,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:04:17,753 INFO L87 Difference]: Start difference. First operand 275 states and 601 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:18,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:18,391 INFO L93 Difference]: Finished difference Result 351 states and 737 transitions. [2021-06-05 22:04:18,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:04:18,392 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:18,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:18,392 INFO L225 Difference]: With dead ends: 351 [2021-06-05 22:04:18,392 INFO L226 Difference]: Without dead ends: 327 [2021-06-05 22:04:18,392 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 762.7ms TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:04:18,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-06-05 22:04:18,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 272. [2021-06-05 22:04:18,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 2.195571955719557) internal successors, (595), 271 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:18,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 595 transitions. [2021-06-05 22:04:18,394 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 595 transitions. Word has length 20 [2021-06-05 22:04:18,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:18,394 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 595 transitions. [2021-06-05 22:04:18,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:18,395 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 595 transitions. [2021-06-05 22:04:18,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:18,395 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:18,395 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:18,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 852 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3979 [2021-06-05 22:04:18,595 INFO L430 AbstractCegarLoop]: === Iteration 858 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:18,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:18,595 INFO L82 PathProgramCache]: Analyzing trace with hash 2121455158, now seen corresponding path program 852 times [2021-06-05 22:04:18,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:18,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749546521] [2021-06-05 22:04:18,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:18,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:18,838 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:18,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:18,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749546521] [2021-06-05 22:04:18,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749546521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:18,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788726322] [2021-06-05 22:04:18,839 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 853 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 853 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:18,874 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:04:18,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:18,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:04:18,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:19,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:19,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:19,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:19,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:19,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:19,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:19,059 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:19,122 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-06-05 22:04:19,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:19,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:04:19,127 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:19,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:19,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:19,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:19,154 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:19,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:19,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:19,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:04:19,180 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:19,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:19,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:04:19,202 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:04:19,284 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:19,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788726322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:19,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:19,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:04:19,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136439666] [2021-06-05 22:04:19,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:04:19,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:19,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:04:19,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:04:19,285 INFO L87 Difference]: Start difference. First operand 272 states and 595 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:20,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:20,145 INFO L93 Difference]: Finished difference Result 369 states and 764 transitions. [2021-06-05 22:04:20,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:04:20,145 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:20,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:20,145 INFO L225 Difference]: With dead ends: 369 [2021-06-05 22:04:20,145 INFO L226 Difference]: Without dead ends: 336 [2021-06-05 22:04:20,145 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 971.2ms TimeCoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:04:20,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-06-05 22:04:20,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 271. [2021-06-05 22:04:20,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 2.196296296296296) internal successors, (593), 270 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:20,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 593 transitions. [2021-06-05 22:04:20,147 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 593 transitions. Word has length 20 [2021-06-05 22:04:20,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:20,148 INFO L482 AbstractCegarLoop]: Abstraction has 271 states and 593 transitions. [2021-06-05 22:04:20,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:20,148 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 593 transitions. [2021-06-05 22:04:20,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:20,148 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:20,148 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:20,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3984,853 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:20,348 INFO L430 AbstractCegarLoop]: === Iteration 859 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:20,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:20,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1235656878, now seen corresponding path program 853 times [2021-06-05 22:04:20,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:20,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264615193] [2021-06-05 22:04:20,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:20,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:20,558 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:20,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:20,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264615193] [2021-06-05 22:04:20,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264615193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:20,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208464613] [2021-06-05 22:04:20,558 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 854 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 854 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:20,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:20,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:04:20,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:20,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:20,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:20,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:20,807 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:20,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:20,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:20,811 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:20,872 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-06-05 22:04:20,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:20,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:04:20,876 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:20,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:20,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:20,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:20,903 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:20,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:20,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:20,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:04:20,929 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:20,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:20,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:04:20,951 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:04:21,032 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:21,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208464613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:21,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:21,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 22:04:21,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250436810] [2021-06-05 22:04:21,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:04:21,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:21,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:04:21,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:04:21,033 INFO L87 Difference]: Start difference. First operand 271 states and 593 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:21,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:21,470 INFO L93 Difference]: Finished difference Result 335 states and 709 transitions. [2021-06-05 22:04:21,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:04:21,471 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:21,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:21,471 INFO L225 Difference]: With dead ends: 335 [2021-06-05 22:04:21,471 INFO L226 Difference]: Without dead ends: 316 [2021-06-05 22:04:21,471 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 632.2ms TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:04:21,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-06-05 22:04:21,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 269. [2021-06-05 22:04:21,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.1977611940298507) internal successors, (589), 268 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:21,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 589 transitions. [2021-06-05 22:04:21,473 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 589 transitions. Word has length 20 [2021-06-05 22:04:21,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:21,473 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 589 transitions. [2021-06-05 22:04:21,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:21,473 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 589 transitions. [2021-06-05 22:04:21,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:21,474 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:21,474 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:21,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 854 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3989 [2021-06-05 22:04:21,674 INFO L430 AbstractCegarLoop]: === Iteration 860 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:21,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:21,674 INFO L82 PathProgramCache]: Analyzing trace with hash 94634998, now seen corresponding path program 854 times [2021-06-05 22:04:21,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:21,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760805683] [2021-06-05 22:04:21,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:21,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:21,906 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:21,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:21,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760805683] [2021-06-05 22:04:21,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760805683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:21,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105452206] [2021-06-05 22:04:21,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 855 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 855 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:21,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:04:21,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:21,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:04:21,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:22,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:22,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:22,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:04:22,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:22,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:22,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:04:22,095 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:22,116 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-06-05 22:04:22,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:22,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:04:22,119 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:22,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:22,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:04:22,127 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:04:22,164 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:22,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105452206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:22,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:22,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 22:04:22,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791668741] [2021-06-05 22:04:22,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:04:22,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:22,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:04:22,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:04:22,165 INFO L87 Difference]: Start difference. First operand 269 states and 589 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:22,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:22,587 INFO L93 Difference]: Finished difference Result 303 states and 652 transitions. [2021-06-05 22:04:22,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:04:22,588 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:22,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:22,588 INFO L225 Difference]: With dead ends: 303 [2021-06-05 22:04:22,588 INFO L226 Difference]: Without dead ends: 290 [2021-06-05 22:04:22,588 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 514.4ms TimeCoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:04:22,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-06-05 22:04:22,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 274. [2021-06-05 22:04:22,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.1941391941391943) internal successors, (599), 273 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:22,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 599 transitions. [2021-06-05 22:04:22,590 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 599 transitions. Word has length 20 [2021-06-05 22:04:22,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:22,590 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 599 transitions. [2021-06-05 22:04:22,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:22,590 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 599 transitions. [2021-06-05 22:04:22,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:22,591 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:22,591 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:22,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3994,855 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:22,791 INFO L430 AbstractCegarLoop]: === Iteration 861 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:22,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:22,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1230820270, now seen corresponding path program 855 times [2021-06-05 22:04:22,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:22,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181824394] [2021-06-05 22:04:22,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:22,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:23,012 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:23,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:23,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181824394] [2021-06-05 22:04:23,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181824394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:23,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275282245] [2021-06-05 22:04:23,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 856 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 856 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:23,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:04:23,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:23,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:04:23,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:23,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:23,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:23,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:23,174 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:23,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:23,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:23,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:23,177 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:23,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:23,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:23,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:23,181 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:23,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:23,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:23,184 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:23,232 INFO L628 ElimStorePlain]: treesize reduction 77, result has 44.2 percent of original size [2021-06-05 22:04:23,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:23,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:23,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:04:23,236 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:23,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:23,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:04:23,240 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:23,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:23,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:04:23,260 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:161, output treesize:32 [2021-06-05 22:04:23,349 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:23,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275282245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:23,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:23,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:04:23,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671066786] [2021-06-05 22:04:23,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:04:23,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:23,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:04:23,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:04:23,350 INFO L87 Difference]: Start difference. First operand 274 states and 599 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:24,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:24,013 INFO L93 Difference]: Finished difference Result 326 states and 687 transitions. [2021-06-05 22:04:24,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:04:24,014 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:24,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:24,014 INFO L225 Difference]: With dead ends: 326 [2021-06-05 22:04:24,014 INFO L226 Difference]: Without dead ends: 308 [2021-06-05 22:04:24,014 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 724.5ms TimeCoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:04:24,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-06-05 22:04:24,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 274. [2021-06-05 22:04:24,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.1941391941391943) internal successors, (599), 273 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:24,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 599 transitions. [2021-06-05 22:04:24,016 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 599 transitions. Word has length 20 [2021-06-05 22:04:24,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:24,016 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 599 transitions. [2021-06-05 22:04:24,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:24,016 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 599 transitions. [2021-06-05 22:04:24,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:24,017 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:24,017 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:24,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3995,856 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:24,217 INFO L430 AbstractCegarLoop]: === Iteration 862 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:24,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:24,218 INFO L82 PathProgramCache]: Analyzing trace with hash -915350490, now seen corresponding path program 856 times [2021-06-05 22:04:24,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:24,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498181310] [2021-06-05 22:04:24,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:24,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:24,468 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:24,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:24,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498181310] [2021-06-05 22:04:24,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498181310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:24,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407708974] [2021-06-05 22:04:24,468 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 857 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 857 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:24,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:04:24,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:24,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:04:24,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:24,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:24,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:24,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:24,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:24,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:24,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:24,666 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:24,733 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-06-05 22:04:24,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:24,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:24,737 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:24,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:24,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:24,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:04:24,763 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:24,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:24,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:24,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:04:24,790 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:24,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:24,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:04:24,812 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:04:24,894 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:24,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407708974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:24,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:24,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:04:24,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93838805] [2021-06-05 22:04:24,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:04:24,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:24,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:04:24,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:04:24,895 INFO L87 Difference]: Start difference. First operand 274 states and 599 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:25,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:25,537 INFO L93 Difference]: Finished difference Result 341 states and 721 transitions. [2021-06-05 22:04:25,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:04:25,537 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:25,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:25,537 INFO L225 Difference]: With dead ends: 341 [2021-06-05 22:04:25,537 INFO L226 Difference]: Without dead ends: 322 [2021-06-05 22:04:25,537 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 784.9ms TimeCoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:04:25,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-06-05 22:04:25,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 273. [2021-06-05 22:04:25,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 2.1948529411764706) internal successors, (597), 272 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:25,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 597 transitions. [2021-06-05 22:04:25,540 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 597 transitions. Word has length 20 [2021-06-05 22:04:25,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:25,540 INFO L482 AbstractCegarLoop]: Abstraction has 273 states and 597 transitions. [2021-06-05 22:04:25,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:25,540 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 597 transitions. [2021-06-05 22:04:25,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:25,540 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:25,540 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:25,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 857 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3999 [2021-06-05 22:04:25,740 INFO L430 AbstractCegarLoop]: === Iteration 863 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:25,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:25,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1272832686, now seen corresponding path program 857 times [2021-06-05 22:04:25,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:25,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679236274] [2021-06-05 22:04:25,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:25,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:25,961 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:25,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:25,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679236274] [2021-06-05 22:04:25,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679236274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:25,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343106079] [2021-06-05 22:04:25,962 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 858 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 858 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:25,989 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:04:25,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:25,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:04:25,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:26,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:26,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:26,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:26,182 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:26,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:26,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:26,185 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:26,250 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-06-05 22:04:26,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:26,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:04:26,254 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:26,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:26,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:26,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:26,282 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:26,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:26,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:26,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:04:26,308 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:26,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:26,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:04:26,331 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:04:26,416 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:26,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343106079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:26,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:26,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:04:26,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141276560] [2021-06-05 22:04:26,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:04:26,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:26,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:04:26,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:04:26,416 INFO L87 Difference]: Start difference. First operand 273 states and 597 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:27,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:27,186 INFO L93 Difference]: Finished difference Result 373 states and 772 transitions. [2021-06-05 22:04:27,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:04:27,186 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:27,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:27,187 INFO L225 Difference]: With dead ends: 373 [2021-06-05 22:04:27,187 INFO L226 Difference]: Without dead ends: 340 [2021-06-05 22:04:27,187 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 903.4ms TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:04:27,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-06-05 22:04:27,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 273. [2021-06-05 22:04:27,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 2.1948529411764706) internal successors, (597), 272 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:27,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 597 transitions. [2021-06-05 22:04:27,189 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 597 transitions. Word has length 20 [2021-06-05 22:04:27,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:27,189 INFO L482 AbstractCegarLoop]: Abstraction has 273 states and 597 transitions. [2021-06-05 22:04:27,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:27,189 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 597 transitions. [2021-06-05 22:04:27,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:27,190 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:27,190 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:27,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4004,858 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:27,390 INFO L430 AbstractCegarLoop]: === Iteration 864 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:27,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:27,390 INFO L82 PathProgramCache]: Analyzing trace with hash 387034406, now seen corresponding path program 858 times [2021-06-05 22:04:27,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:27,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052965104] [2021-06-05 22:04:27,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:27,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:27,622 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:27,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:27,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052965104] [2021-06-05 22:04:27,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052965104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:27,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64497216] [2021-06-05 22:04:27,622 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 859 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 859 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:27,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:04:27,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:27,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:04:27,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:27,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:27,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:27,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:27,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:27,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:27,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:27,871 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:27,932 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-06-05 22:04:27,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:27,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:04:27,937 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:27,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:27,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:27,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:27,963 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:27,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:27,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:27,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:04:27,989 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:28,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:28,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:04:28,010 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:04:28,096 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:28,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64497216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:28,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:28,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:04:28,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835965666] [2021-06-05 22:04:28,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:04:28,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:28,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:04:28,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:04:28,097 INFO L87 Difference]: Start difference. First operand 273 states and 597 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:29,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:29,160 INFO L93 Difference]: Finished difference Result 396 states and 813 transitions. [2021-06-05 22:04:29,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:04:29,161 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:29,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:29,161 INFO L225 Difference]: With dead ends: 396 [2021-06-05 22:04:29,161 INFO L226 Difference]: Without dead ends: 356 [2021-06-05 22:04:29,161 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1155.9ms TimeCoverageRelationStatistics Valid=158, Invalid=1102, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:04:29,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-06-05 22:04:29,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 273. [2021-06-05 22:04:29,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 2.1948529411764706) internal successors, (597), 272 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:29,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 597 transitions. [2021-06-05 22:04:29,163 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 597 transitions. Word has length 20 [2021-06-05 22:04:29,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:29,163 INFO L482 AbstractCegarLoop]: Abstraction has 273 states and 597 transitions. [2021-06-05 22:04:29,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:29,164 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 597 transitions. [2021-06-05 22:04:29,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:29,164 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:29,164 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:29,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4009,859 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:29,364 INFO L430 AbstractCegarLoop]: === Iteration 865 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:29,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:29,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1302908498, now seen corresponding path program 859 times [2021-06-05 22:04:29,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:29,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152031292] [2021-06-05 22:04:29,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:29,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:29,587 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:29,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:29,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152031292] [2021-06-05 22:04:29,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152031292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:29,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990011816] [2021-06-05 22:04:29,588 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 860 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 860 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:29,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:29,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:04:29,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:29,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:29,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:29,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:29,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:29,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:29,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:29,865 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:29,926 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-06-05 22:04:29,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:29,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:04:29,930 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:29,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:29,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:29,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:29,957 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:29,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:29,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:29,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:04:29,983 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:30,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:30,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:04:30,005 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:04:30,088 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:30,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990011816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:30,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:30,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 22:04:30,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75393681] [2021-06-05 22:04:30,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:04:30,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:30,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:04:30,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:04:30,088 INFO L87 Difference]: Start difference. First operand 273 states and 597 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:30,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:30,635 INFO L93 Difference]: Finished difference Result 336 states and 711 transitions. [2021-06-05 22:04:30,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:04:30,636 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:30,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:30,636 INFO L225 Difference]: With dead ends: 336 [2021-06-05 22:04:30,636 INFO L226 Difference]: Without dead ends: 317 [2021-06-05 22:04:30,636 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 638.7ms TimeCoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:04:30,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-06-05 22:04:30,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 273. [2021-06-05 22:04:30,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 2.1948529411764706) internal successors, (597), 272 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:30,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 597 transitions. [2021-06-05 22:04:30,638 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 597 transitions. Word has length 20 [2021-06-05 22:04:30,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:30,638 INFO L482 AbstractCegarLoop]: Abstraction has 273 states and 597 transitions. [2021-06-05 22:04:30,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:30,638 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 597 transitions. [2021-06-05 22:04:30,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:30,639 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:30,639 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:30,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4014,860 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:30,839 INFO L430 AbstractCegarLoop]: === Iteration 866 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:30,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:30,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1245196386, now seen corresponding path program 860 times [2021-06-05 22:04:30,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:30,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192794652] [2021-06-05 22:04:30,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:30,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:31,022 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:31,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:31,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192794652] [2021-06-05 22:04:31,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192794652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:31,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325111855] [2021-06-05 22:04:31,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 861 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 861 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:31,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:04:31,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:31,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:04:31,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:31,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:31,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:31,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:04:31,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:31,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:31,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:04:31,204 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:31,227 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-06-05 22:04:31,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:31,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:04:31,230 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:31,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:31,238 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:04:31,238 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:04:31,277 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:31,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325111855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:31,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:31,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 22:04:31,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186417276] [2021-06-05 22:04:31,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:04:31,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:31,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:04:31,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:04:31,277 INFO L87 Difference]: Start difference. First operand 273 states and 597 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:31,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:31,676 INFO L93 Difference]: Finished difference Result 301 states and 642 transitions. [2021-06-05 22:04:31,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:04:31,676 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:31,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:31,676 INFO L225 Difference]: With dead ends: 301 [2021-06-05 22:04:31,676 INFO L226 Difference]: Without dead ends: 285 [2021-06-05 22:04:31,676 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 481.3ms TimeCoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:04:31,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-06-05 22:04:31,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 274. [2021-06-05 22:04:31,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.1941391941391943) internal successors, (599), 273 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:31,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 599 transitions. [2021-06-05 22:04:31,678 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 599 transitions. Word has length 20 [2021-06-05 22:04:31,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:31,678 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 599 transitions. [2021-06-05 22:04:31,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:31,679 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 599 transitions. [2021-06-05 22:04:31,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:31,679 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:31,679 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:31,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4019,861 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:31,879 INFO L430 AbstractCegarLoop]: === Iteration 867 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:31,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:31,879 INFO L82 PathProgramCache]: Analyzing trace with hash 2107201450, now seen corresponding path program 861 times [2021-06-05 22:04:31,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:31,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612163105] [2021-06-05 22:04:31,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:31,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:32,044 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:32,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:32,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612163105] [2021-06-05 22:04:32,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612163105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:32,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692165909] [2021-06-05 22:04:32,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 862 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 862 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:32,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:04:32,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:32,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:04:32,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:32,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:32,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:32,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:32,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:32,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:32,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:32,217 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:32,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:32,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:32,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:32,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:04:32,240 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:32,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:32,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:04:32,243 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:32,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:32,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:04:32,261 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:29 [2021-06-05 22:04:32,316 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:32,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692165909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:32,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:32,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 22:04:32,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375966004] [2021-06-05 22:04:32,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:04:32,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:32,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:04:32,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:04:32,317 INFO L87 Difference]: Start difference. First operand 274 states and 599 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:33,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:33,147 INFO L93 Difference]: Finished difference Result 305 states and 654 transitions. [2021-06-05 22:04:33,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:04:33,147 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:33,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:33,147 INFO L225 Difference]: With dead ends: 305 [2021-06-05 22:04:33,147 INFO L226 Difference]: Without dead ends: 292 [2021-06-05 22:04:33,147 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 738.2ms TimeCoverageRelationStatistics Valid=124, Invalid=1208, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:04:33,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-06-05 22:04:33,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 275. [2021-06-05 22:04:33,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.1934306569343067) internal successors, (601), 274 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:33,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 601 transitions. [2021-06-05 22:04:33,149 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 601 transitions. Word has length 20 [2021-06-05 22:04:33,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:33,149 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 601 transitions. [2021-06-05 22:04:33,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:33,150 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 601 transitions. [2021-06-05 22:04:33,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:33,150 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:33,150 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:33,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 862 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4020 [2021-06-05 22:04:33,350 INFO L430 AbstractCegarLoop]: === Iteration 868 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:33,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:33,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1051580574, now seen corresponding path program 862 times [2021-06-05 22:04:33,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:33,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506199489] [2021-06-05 22:04:33,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:33,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:33,590 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:33,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:33,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506199489] [2021-06-05 22:04:33,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506199489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:33,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369623116] [2021-06-05 22:04:33,590 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 863 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 863 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:33,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:04:33,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:33,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:04:33,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:33,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:33,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:33,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:33,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:33,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:33,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:33,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:33,753 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:33,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:33,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:33,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:33,756 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:33,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:33,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:33,760 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:33,815 INFO L628 ElimStorePlain]: treesize reduction 83, result has 43.5 percent of original size [2021-06-05 22:04:33,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:33,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:33,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:04:33,819 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:33,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:33,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:04:33,823 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:33,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:33,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:04:33,847 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 22:04:33,928 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:33,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369623116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:33,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:33,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 22:04:33,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434589667] [2021-06-05 22:04:33,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:04:33,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:33,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:04:33,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:04:33,929 INFO L87 Difference]: Start difference. First operand 275 states and 601 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:34,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:34,706 INFO L93 Difference]: Finished difference Result 305 states and 652 transitions. [2021-06-05 22:04:34,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:04:34,706 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:34,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:34,707 INFO L225 Difference]: With dead ends: 305 [2021-06-05 22:04:34,707 INFO L226 Difference]: Without dead ends: 293 [2021-06-05 22:04:34,707 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 813.8ms TimeCoverageRelationStatistics Valid=131, Invalid=1201, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:04:34,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-06-05 22:04:34,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 273. [2021-06-05 22:04:34,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 2.1948529411764706) internal successors, (597), 272 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:34,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 597 transitions. [2021-06-05 22:04:34,709 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 597 transitions. Word has length 20 [2021-06-05 22:04:34,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:34,709 INFO L482 AbstractCegarLoop]: Abstraction has 273 states and 597 transitions. [2021-06-05 22:04:34,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:34,709 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 597 transitions. [2021-06-05 22:04:34,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:34,709 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:34,709 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:34,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 863 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4023 [2021-06-05 22:04:34,910 INFO L430 AbstractCegarLoop]: === Iteration 869 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:34,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:34,910 INFO L82 PathProgramCache]: Analyzing trace with hash 417330, now seen corresponding path program 863 times [2021-06-05 22:04:34,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:34,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117988780] [2021-06-05 22:04:34,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:34,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:35,115 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:35,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:35,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117988780] [2021-06-05 22:04:35,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117988780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:35,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134797825] [2021-06-05 22:04:35,115 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 864 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 864 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:35,142 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:04:35,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:35,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:04:35,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:35,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:35,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:35,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:04:35,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:35,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:35,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:04:35,284 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:35,305 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-06-05 22:04:35,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:35,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:04:35,309 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:35,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:35,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:04:35,316 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:04:35,359 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:35,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134797825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:35,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:35,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 22:04:35,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481838698] [2021-06-05 22:04:35,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:04:35,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:35,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:04:35,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:04:35,359 INFO L87 Difference]: Start difference. First operand 273 states and 597 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:35,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:35,805 INFO L93 Difference]: Finished difference Result 297 states and 635 transitions. [2021-06-05 22:04:35,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:04:35,805 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:35,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:35,806 INFO L225 Difference]: With dead ends: 297 [2021-06-05 22:04:35,806 INFO L226 Difference]: Without dead ends: 284 [2021-06-05 22:04:35,806 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 505.7ms TimeCoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:04:35,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-06-05 22:04:35,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 275. [2021-06-05 22:04:35,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.1934306569343067) internal successors, (601), 274 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:35,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 601 transitions. [2021-06-05 22:04:35,808 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 601 transitions. Word has length 20 [2021-06-05 22:04:35,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:35,808 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 601 transitions. [2021-06-05 22:04:35,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:35,808 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 601 transitions. [2021-06-05 22:04:35,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:35,808 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:35,808 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:36,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 864 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4026 [2021-06-05 22:04:36,009 INFO L430 AbstractCegarLoop]: === Iteration 870 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:36,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:36,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1136602602, now seen corresponding path program 864 times [2021-06-05 22:04:36,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:36,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742950742] [2021-06-05 22:04:36,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:36,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:36,228 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:36,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:36,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742950742] [2021-06-05 22:04:36,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742950742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:36,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032096110] [2021-06-05 22:04:36,229 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 865 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 865 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:36,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:04:36,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:36,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:04:36,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:36,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:36,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:36,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:36,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:36,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:36,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:36,370 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:36,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:36,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:36,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:36,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:04:36,396 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:36,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:36,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:04:36,400 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:36,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:36,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:04:36,421 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-06-05 22:04:36,514 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:36,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032096110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:36,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:36,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 22:04:36,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706496501] [2021-06-05 22:04:36,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:04:36,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:36,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:04:36,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:04:36,515 INFO L87 Difference]: Start difference. First operand 275 states and 601 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:37,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:37,097 INFO L93 Difference]: Finished difference Result 298 states and 643 transitions. [2021-06-05 22:04:37,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:04:37,097 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:37,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:37,097 INFO L225 Difference]: With dead ends: 298 [2021-06-05 22:04:37,097 INFO L226 Difference]: Without dead ends: 291 [2021-06-05 22:04:37,097 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 702.7ms TimeCoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:04:37,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-06-05 22:04:37,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 274. [2021-06-05 22:04:37,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.1941391941391943) internal successors, (599), 273 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:37,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 599 transitions. [2021-06-05 22:04:37,100 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 599 transitions. Word has length 20 [2021-06-05 22:04:37,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:37,100 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 599 transitions. [2021-06-05 22:04:37,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:37,100 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 599 transitions. [2021-06-05 22:04:37,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:37,100 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:37,100 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:37,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4027,865 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:37,300 INFO L430 AbstractCegarLoop]: === Iteration 871 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:37,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:37,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1009568158, now seen corresponding path program 865 times [2021-06-05 22:04:37,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:37,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748337690] [2021-06-05 22:04:37,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:37,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:37,512 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:37,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:37,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748337690] [2021-06-05 22:04:37,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748337690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:37,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609260738] [2021-06-05 22:04:37,512 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 866 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 866 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:37,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:37,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:04:37,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:37,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:37,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:37,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:37,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:37,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:37,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:37,680 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:37,740 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-06-05 22:04:37,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:37,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:04:37,745 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:37,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:37,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:37,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:37,775 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:37,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:37,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:37,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:04:37,801 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:37,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:37,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:04:37,824 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:04:37,908 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:37,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609260738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:37,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:37,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 22:04:37,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125662080] [2021-06-05 22:04:37,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:04:37,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:37,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:04:37,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:04:37,909 INFO L87 Difference]: Start difference. First operand 274 states and 599 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:38,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:38,850 INFO L93 Difference]: Finished difference Result 359 states and 746 transitions. [2021-06-05 22:04:38,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:04:38,851 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:38,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:38,851 INFO L225 Difference]: With dead ends: 359 [2021-06-05 22:04:38,851 INFO L226 Difference]: Without dead ends: 333 [2021-06-05 22:04:38,851 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 868.0ms TimeCoverageRelationStatistics Valid=149, Invalid=1183, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:04:38,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-06-05 22:04:38,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 274. [2021-06-05 22:04:38,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.1941391941391943) internal successors, (599), 273 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:38,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 599 transitions. [2021-06-05 22:04:38,854 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 599 transitions. Word has length 20 [2021-06-05 22:04:38,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:38,854 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 599 transitions. [2021-06-05 22:04:38,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:38,854 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 599 transitions. [2021-06-05 22:04:38,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:38,854 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:38,854 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:39,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4032,866 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:39,054 INFO L430 AbstractCegarLoop]: === Iteration 872 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:39,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:39,055 INFO L82 PathProgramCache]: Analyzing trace with hash -885380950, now seen corresponding path program 866 times [2021-06-05 22:04:39,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:39,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103502949] [2021-06-05 22:04:39,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:39,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:39,243 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:39,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:39,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103502949] [2021-06-05 22:04:39,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103502949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:39,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893155356] [2021-06-05 22:04:39,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 867 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 867 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:39,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:04:39,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:39,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:04:39,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:39,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:39,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:39,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:04:39,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:39,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:39,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:04:39,427 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:39,450 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-06-05 22:04:39,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:39,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:04:39,453 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:39,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:39,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:04:39,461 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:04:39,497 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:39,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893155356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:39,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:39,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 22:04:39,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215883780] [2021-06-05 22:04:39,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:04:39,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:39,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:04:39,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:04:39,498 INFO L87 Difference]: Start difference. First operand 274 states and 599 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:40,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:40,005 INFO L93 Difference]: Finished difference Result 308 states and 660 transitions. [2021-06-05 22:04:40,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:04:40,005 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:40,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:40,006 INFO L225 Difference]: With dead ends: 308 [2021-06-05 22:04:40,006 INFO L226 Difference]: Without dead ends: 295 [2021-06-05 22:04:40,006 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 530.5ms TimeCoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:04:40,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-06-05 22:04:40,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 277. [2021-06-05 22:04:40,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 2.1920289855072466) internal successors, (605), 276 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:40,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 605 transitions. [2021-06-05 22:04:40,008 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 605 transitions. Word has length 20 [2021-06-05 22:04:40,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:40,008 INFO L482 AbstractCegarLoop]: Abstraction has 277 states and 605 transitions. [2021-06-05 22:04:40,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:40,008 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 605 transitions. [2021-06-05 22:04:40,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:40,009 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:40,009 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:40,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4037,867 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:40,209 INFO L430 AbstractCegarLoop]: === Iteration 873 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:40,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:40,209 INFO L82 PathProgramCache]: Analyzing trace with hash 250804322, now seen corresponding path program 867 times [2021-06-05 22:04:40,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:40,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378000571] [2021-06-05 22:04:40,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:40,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:40,371 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:40,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:40,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378000571] [2021-06-05 22:04:40,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378000571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:40,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412971846] [2021-06-05 22:04:40,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 868 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 868 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:40,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:04:40,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:40,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:04:40,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:40,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:40,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:40,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:40,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:40,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:40,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:40,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:40,518 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:40,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:40,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:40,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:40,522 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:40,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:40,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:40,525 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:40,572 INFO L628 ElimStorePlain]: treesize reduction 77, result has 44.2 percent of original size [2021-06-05 22:04:40,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:40,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:40,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:04:40,576 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:40,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:40,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:04:40,579 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:40,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:40,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:04:40,600 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:161, output treesize:32 [2021-06-05 22:04:40,681 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:40,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412971846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:40,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:40,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 22:04:40,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386969094] [2021-06-05 22:04:40,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:04:40,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:40,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:04:40,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:04:40,682 INFO L87 Difference]: Start difference. First operand 277 states and 605 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:41,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:41,263 INFO L93 Difference]: Finished difference Result 306 states and 654 transitions. [2021-06-05 22:04:41,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:04:41,264 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:41,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:41,264 INFO L225 Difference]: With dead ends: 306 [2021-06-05 22:04:41,264 INFO L226 Difference]: Without dead ends: 294 [2021-06-05 22:04:41,264 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 628.4ms TimeCoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:04:41,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-06-05 22:04:41,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 276. [2021-06-05 22:04:41,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.192727272727273) internal successors, (603), 275 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:41,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 603 transitions. [2021-06-05 22:04:41,266 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 603 transitions. Word has length 20 [2021-06-05 22:04:41,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:41,267 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 603 transitions. [2021-06-05 22:04:41,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:41,267 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 603 transitions. [2021-06-05 22:04:41,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:41,267 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:41,267 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:41,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4038,868 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:41,467 INFO L430 AbstractCegarLoop]: === Iteration 874 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:41,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:41,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1895366438, now seen corresponding path program 868 times [2021-06-05 22:04:41,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:41,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767529612] [2021-06-05 22:04:41,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:41,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:41,665 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:41,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:41,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767529612] [2021-06-05 22:04:41,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767529612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:41,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071216208] [2021-06-05 22:04:41,665 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 869 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 869 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:41,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:04:41,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:41,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:04:41,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:41,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:41,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:41,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:41,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:41,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:41,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:41,827 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:41,888 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-06-05 22:04:41,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:41,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:41,892 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:41,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:41,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:41,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:04:41,917 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:41,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:41,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:41,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:04:41,943 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:41,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:41,965 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:04:41,965 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:04:42,040 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:42,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071216208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:42,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:42,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 22:04:42,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419315391] [2021-06-05 22:04:42,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:04:42,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:42,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:04:42,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:04:42,041 INFO L87 Difference]: Start difference. First operand 276 states and 603 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:42,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:42,606 INFO L93 Difference]: Finished difference Result 346 states and 730 transitions. [2021-06-05 22:04:42,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:04:42,607 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:42,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:42,607 INFO L225 Difference]: With dead ends: 346 [2021-06-05 22:04:42,607 INFO L226 Difference]: Without dead ends: 327 [2021-06-05 22:04:42,607 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 688.0ms TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:04:42,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-06-05 22:04:42,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 275. [2021-06-05 22:04:42,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.1934306569343067) internal successors, (601), 274 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:42,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 601 transitions. [2021-06-05 22:04:42,609 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 601 transitions. Word has length 20 [2021-06-05 22:04:42,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:42,609 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 601 transitions. [2021-06-05 22:04:42,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:42,610 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 601 transitions. [2021-06-05 22:04:42,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:42,610 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:42,610 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:42,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 869 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4042 [2021-06-05 22:04:42,810 INFO L430 AbstractCegarLoop]: === Iteration 875 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:42,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:42,810 INFO L82 PathProgramCache]: Analyzing trace with hash 292816738, now seen corresponding path program 869 times [2021-06-05 22:04:42,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:42,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824830275] [2021-06-05 22:04:42,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:42,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:43,020 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:43,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:43,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824830275] [2021-06-05 22:04:43,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824830275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:43,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380229619] [2021-06-05 22:04:43,020 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 870 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 870 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:43,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:04:43,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:43,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:04:43,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:43,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:43,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:43,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:43,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:43,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:43,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:43,219 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:43,286 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-06-05 22:04:43,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:43,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:04:43,290 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:43,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:43,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:43,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:43,317 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:43,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:43,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:43,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:04:43,343 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:43,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:43,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:04:43,376 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:04:43,473 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:43,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380229619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:43,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:43,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 22:04:43,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730943471] [2021-06-05 22:04:43,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:04:43,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:43,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:04:43,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:04:43,474 INFO L87 Difference]: Start difference. First operand 275 states and 601 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:44,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:44,256 INFO L93 Difference]: Finished difference Result 355 states and 748 transitions. [2021-06-05 22:04:44,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:04:44,256 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:44,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:44,257 INFO L225 Difference]: With dead ends: 355 [2021-06-05 22:04:44,257 INFO L226 Difference]: Without dead ends: 336 [2021-06-05 22:04:44,257 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 838.0ms TimeCoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:04:44,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-06-05 22:04:44,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 274. [2021-06-05 22:04:44,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.1941391941391943) internal successors, (599), 273 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:44,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 599 transitions. [2021-06-05 22:04:44,259 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 599 transitions. Word has length 20 [2021-06-05 22:04:44,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:44,259 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 599 transitions. [2021-06-05 22:04:44,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:44,259 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 599 transitions. [2021-06-05 22:04:44,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:44,260 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:44,260 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:44,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4047,870 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:44,460 INFO L430 AbstractCegarLoop]: === Iteration 876 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:44,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:44,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1719643442, now seen corresponding path program 870 times [2021-06-05 22:04:44,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:44,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983422546] [2021-06-05 22:04:44,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:44,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:44,621 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:44,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:44,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983422546] [2021-06-05 22:04:44,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983422546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:44,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392632632] [2021-06-05 22:04:44,622 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 871 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 871 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:44,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:04:44,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:44,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:04:44,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:44,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:44,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:44,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:04:44,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:44,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:44,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:04:44,793 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:44,817 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-06-05 22:04:44,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:44,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:04:44,821 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:44,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:44,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:04:44,832 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:04:44,872 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:44,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392632632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:44,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:44,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 22:04:44,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020304620] [2021-06-05 22:04:44,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:04:44,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:44,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:04:44,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:04:44,873 INFO L87 Difference]: Start difference. First operand 274 states and 599 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:45,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:45,255 INFO L93 Difference]: Finished difference Result 311 states and 663 transitions. [2021-06-05 22:04:45,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:04:45,255 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:45,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:45,255 INFO L225 Difference]: With dead ends: 311 [2021-06-05 22:04:45,255 INFO L226 Difference]: Without dead ends: 298 [2021-06-05 22:04:45,255 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 470.1ms TimeCoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:04:45,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-06-05 22:04:45,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 278. [2021-06-05 22:04:45,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.191335740072202) internal successors, (607), 277 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:45,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 607 transitions. [2021-06-05 22:04:45,257 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 607 transitions. Word has length 20 [2021-06-05 22:04:45,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:45,257 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 607 transitions. [2021-06-05 22:04:45,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:45,258 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 607 transitions. [2021-06-05 22:04:45,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:45,258 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:45,258 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:45,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 871 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4052 [2021-06-05 22:04:45,458 INFO L430 AbstractCegarLoop]: === Iteration 877 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:45,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:45,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1439138582, now seen corresponding path program 871 times [2021-06-05 22:04:45,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:45,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475020843] [2021-06-05 22:04:45,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:45,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:45,633 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:45,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:45,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475020843] [2021-06-05 22:04:45,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475020843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:45,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516466277] [2021-06-05 22:04:45,634 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 872 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 872 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:45,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:45,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:04:45,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:45,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:45,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:45,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:45,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:45,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:45,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:45,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:45,791 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:45,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:45,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:45,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:45,795 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:45,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:45,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:45,799 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:45,858 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-06-05 22:04:45,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:45,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:45,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:04:45,862 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:45,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:45,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:04:45,866 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:45,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:45,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:04:45,890 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 22:04:45,964 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:45,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516466277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:45,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:45,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 22:04:45,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417096390] [2021-06-05 22:04:45,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:04:45,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:45,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:04:45,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:04:45,964 INFO L87 Difference]: Start difference. First operand 278 states and 607 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:46,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:46,448 INFO L93 Difference]: Finished difference Result 340 states and 714 transitions. [2021-06-05 22:04:46,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:04:46,448 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:46,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:46,449 INFO L225 Difference]: With dead ends: 340 [2021-06-05 22:04:46,449 INFO L226 Difference]: Without dead ends: 321 [2021-06-05 22:04:46,449 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 540.8ms TimeCoverageRelationStatistics Valid=110, Invalid=946, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:04:46,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-06-05 22:04:46,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 277. [2021-06-05 22:04:46,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 2.1920289855072466) internal successors, (605), 276 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:46,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 605 transitions. [2021-06-05 22:04:46,451 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 605 transitions. Word has length 20 [2021-06-05 22:04:46,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:46,451 INFO L482 AbstractCegarLoop]: Abstraction has 277 states and 605 transitions. [2021-06-05 22:04:46,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:46,451 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 605 transitions. [2021-06-05 22:04:46,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:46,452 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:46,452 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:46,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 872 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4053 [2021-06-05 22:04:46,652 INFO L430 AbstractCegarLoop]: === Iteration 878 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:46,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:46,652 INFO L82 PathProgramCache]: Analyzing trace with hash 709657954, now seen corresponding path program 872 times [2021-06-05 22:04:46,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:46,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315465763] [2021-06-05 22:04:46,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:46,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:46,868 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:46,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:46,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315465763] [2021-06-05 22:04:46,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315465763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:46,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070501700] [2021-06-05 22:04:46,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 873 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 873 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:46,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:04:46,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:46,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:04:46,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:47,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:47,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:47,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:47,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:47,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:47,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:47,034 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:47,098 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-06-05 22:04:47,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:47,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:47,102 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:47,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:47,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:47,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:04:47,128 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:47,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:47,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:47,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:04:47,154 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:47,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:47,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:04:47,176 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:04:47,261 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:47,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070501700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:47,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:47,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 22:04:47,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977938754] [2021-06-05 22:04:47,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:04:47,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:47,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:04:47,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:04:47,261 INFO L87 Difference]: Start difference. First operand 277 states and 605 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:48,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:48,071 INFO L93 Difference]: Finished difference Result 351 states and 740 transitions. [2021-06-05 22:04:48,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:04:48,072 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:48,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:48,072 INFO L225 Difference]: With dead ends: 351 [2021-06-05 22:04:48,072 INFO L226 Difference]: Without dead ends: 332 [2021-06-05 22:04:48,072 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 917.5ms TimeCoverageRelationStatistics Valid=148, Invalid=1184, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:04:48,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-06-05 22:04:48,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 276. [2021-06-05 22:04:48,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.192727272727273) internal successors, (603), 275 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:48,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 603 transitions. [2021-06-05 22:04:48,074 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 603 transitions. Word has length 20 [2021-06-05 22:04:48,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:48,074 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 603 transitions. [2021-06-05 22:04:48,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:48,074 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 603 transitions. [2021-06-05 22:04:48,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:48,075 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:48,075 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:48,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 873 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4056 [2021-06-05 22:04:48,275 INFO L430 AbstractCegarLoop]: === Iteration 879 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:48,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:48,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1397126166, now seen corresponding path program 873 times [2021-06-05 22:04:48,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:48,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771968554] [2021-06-05 22:04:48,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:48,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:48,517 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:48,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:48,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771968554] [2021-06-05 22:04:48,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771968554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:48,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761201100] [2021-06-05 22:04:48,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 874 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 874 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:48,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:04:48,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:48,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:04:48,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:48,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:48,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:48,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:48,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:48,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:48,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:48,715 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:48,775 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-06-05 22:04:48,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:48,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:48,779 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:48,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:48,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:48,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:04:48,805 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:48,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:48,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:48,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:04:48,831 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:48,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:48,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:04:48,853 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:04:48,935 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:48,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761201100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:48,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:48,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 22:04:48,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890991464] [2021-06-05 22:04:48,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:04:48,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:48,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:04:48,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:04:48,935 INFO L87 Difference]: Start difference. First operand 276 states and 603 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:49,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:49,899 INFO L93 Difference]: Finished difference Result 400 states and 827 transitions. [2021-06-05 22:04:49,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:04:49,900 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:49,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:49,900 INFO L225 Difference]: With dead ends: 400 [2021-06-05 22:04:49,900 INFO L226 Difference]: Without dead ends: 367 [2021-06-05 22:04:49,900 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 1035.5ms TimeCoverageRelationStatistics Valid=152, Invalid=1108, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:04:49,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-06-05 22:04:49,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 275. [2021-06-05 22:04:49,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.1934306569343067) internal successors, (601), 274 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:49,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 601 transitions. [2021-06-05 22:04:49,903 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 601 transitions. Word has length 20 [2021-06-05 22:04:49,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:49,903 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 601 transitions. [2021-06-05 22:04:49,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:49,903 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 601 transitions. [2021-06-05 22:04:49,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:49,903 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:49,903 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:50,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4061,874 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:50,104 INFO L430 AbstractCegarLoop]: === Iteration 880 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:50,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:50,104 INFO L82 PathProgramCache]: Analyzing trace with hash 2012042850, now seen corresponding path program 874 times [2021-06-05 22:04:50,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:50,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072293549] [2021-06-05 22:04:50,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:50,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:50,321 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:50,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:50,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072293549] [2021-06-05 22:04:50,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072293549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:50,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411979333] [2021-06-05 22:04:50,322 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 875 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 875 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:50,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:04:50,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:50,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:04:50,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:50,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:50,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:50,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:50,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:50,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:50,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:50,556 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:50,627 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-06-05 22:04:50,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:50,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:04:50,631 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:50,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:50,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:50,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:50,660 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:50,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:50,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:50,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:04:50,686 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:50,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:50,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:04:50,708 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:04:50,795 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:50,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411979333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:50,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:50,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 22:04:50,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057974638] [2021-06-05 22:04:50,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:04:50,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:50,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:04:50,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:04:50,796 INFO L87 Difference]: Start difference. First operand 275 states and 601 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:51,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:51,489 INFO L93 Difference]: Finished difference Result 361 states and 760 transitions. [2021-06-05 22:04:51,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:04:51,489 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:51,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:51,490 INFO L225 Difference]: With dead ends: 361 [2021-06-05 22:04:51,490 INFO L226 Difference]: Without dead ends: 342 [2021-06-05 22:04:51,490 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 752.4ms TimeCoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:04:51,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-06-05 22:04:51,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 274. [2021-06-05 22:04:51,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.1941391941391943) internal successors, (599), 273 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:51,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 599 transitions. [2021-06-05 22:04:51,492 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 599 transitions. Word has length 20 [2021-06-05 22:04:51,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:51,492 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 599 transitions. [2021-06-05 22:04:51,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:51,492 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 599 transitions. [2021-06-05 22:04:51,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:51,492 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:51,492 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:51,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 875 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4066 [2021-06-05 22:04:51,693 INFO L430 AbstractCegarLoop]: === Iteration 881 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:51,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:51,693 INFO L82 PathProgramCache]: Analyzing trace with hash 871020970, now seen corresponding path program 875 times [2021-06-05 22:04:51,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:51,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407494428] [2021-06-05 22:04:51,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:51,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:51,893 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:51,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:51,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407494428] [2021-06-05 22:04:51,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407494428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:51,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454313331] [2021-06-05 22:04:51,893 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 876 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 876 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:51,920 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:04:51,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:51,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:04:51,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:52,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:52,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:52,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:04:52,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:52,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:52,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:04:52,068 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:52,090 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-06-05 22:04:52,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:52,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:04:52,093 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:52,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:52,100 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:04:52,101 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:04:52,139 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:52,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454313331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:52,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:52,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 22:04:52,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508589443] [2021-06-05 22:04:52,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:04:52,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:52,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:04:52,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:04:52,140 INFO L87 Difference]: Start difference. First operand 274 states and 599 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:52,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:52,670 INFO L93 Difference]: Finished difference Result 315 states and 675 transitions. [2021-06-05 22:04:52,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:04:52,670 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:52,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:52,670 INFO L225 Difference]: With dead ends: 315 [2021-06-05 22:04:52,670 INFO L226 Difference]: Without dead ends: 302 [2021-06-05 22:04:52,671 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 552.0ms TimeCoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:04:52,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-06-05 22:04:52,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 279. [2021-06-05 22:04:52,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 2.1906474820143886) internal successors, (609), 278 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:52,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 609 transitions. [2021-06-05 22:04:52,673 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 609 transitions. Word has length 20 [2021-06-05 22:04:52,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:52,673 INFO L482 AbstractCegarLoop]: Abstraction has 279 states and 609 transitions. [2021-06-05 22:04:52,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:52,673 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 609 transitions. [2021-06-05 22:04:52,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:52,673 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:52,673 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:52,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4071,876 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:52,873 INFO L430 AbstractCegarLoop]: === Iteration 882 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:52,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:52,874 INFO L82 PathProgramCache]: Analyzing trace with hash 2007206242, now seen corresponding path program 876 times [2021-06-05 22:04:52,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:52,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316799130] [2021-06-05 22:04:52,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:52,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:53,098 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:53,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:53,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316799130] [2021-06-05 22:04:53,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316799130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:53,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597665186] [2021-06-05 22:04:53,098 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 877 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 877 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:53,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:04:53,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:53,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:04:53,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:53,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:53,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:53,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:53,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:53,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:53,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:53,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:53,249 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:53,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:53,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:53,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:53,253 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:53,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:53,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:53,256 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:53,310 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-06-05 22:04:53,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:53,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:53,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:04:53,314 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:53,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:53,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:04:53,318 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:53,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:53,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:04:53,341 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 22:04:53,422 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:53,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597665186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:53,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:53,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 22:04:53,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985287297] [2021-06-05 22:04:53,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:04:53,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:53,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:04:53,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:04:53,423 INFO L87 Difference]: Start difference. First operand 279 states and 609 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:54,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:54,248 INFO L93 Difference]: Finished difference Result 342 states and 715 transitions. [2021-06-05 22:04:54,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:04:54,249 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:54,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:54,249 INFO L225 Difference]: With dead ends: 342 [2021-06-05 22:04:54,249 INFO L226 Difference]: Without dead ends: 320 [2021-06-05 22:04:54,249 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 798.5ms TimeCoverageRelationStatistics Valid=119, Invalid=1141, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:04:54,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-06-05 22:04:54,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 276. [2021-06-05 22:04:54,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.192727272727273) internal successors, (603), 275 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:54,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 603 transitions. [2021-06-05 22:04:54,251 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 603 transitions. Word has length 20 [2021-06-05 22:04:54,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:54,251 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 603 transitions. [2021-06-05 22:04:54,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:54,251 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 603 transitions. [2021-06-05 22:04:54,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:54,252 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:54,252 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:54,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4072,877 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:54,452 INFO L430 AbstractCegarLoop]: === Iteration 883 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:54,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:54,452 INFO L82 PathProgramCache]: Analyzing trace with hash -138964518, now seen corresponding path program 877 times [2021-06-05 22:04:54,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:54,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007295366] [2021-06-05 22:04:54,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:54,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:54,671 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:54,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:54,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007295366] [2021-06-05 22:04:54,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007295366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:54,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668720227] [2021-06-05 22:04:54,672 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 878 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 878 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:54,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:54,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:04:54,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:54,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:54,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:54,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:54,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:54,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:54,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:54,840 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:54,902 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-06-05 22:04:54,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:54,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:04:54,906 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:54,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:54,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:54,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:54,934 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:54,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:54,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:54,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:04:54,960 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:54,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:54,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:04:54,982 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:04:55,067 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:55,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668720227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:55,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:55,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 22:04:55,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767621573] [2021-06-05 22:04:55,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:04:55,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:55,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:04:55,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:04:55,068 INFO L87 Difference]: Start difference. First operand 276 states and 603 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:55,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:55,846 INFO L93 Difference]: Finished difference Result 350 states and 738 transitions. [2021-06-05 22:04:55,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:04:55,846 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:55,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:55,847 INFO L225 Difference]: With dead ends: 350 [2021-06-05 22:04:55,847 INFO L226 Difference]: Without dead ends: 331 [2021-06-05 22:04:55,847 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 881.5ms TimeCoverageRelationStatistics Valid=146, Invalid=1260, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:04:55,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-06-05 22:04:55,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 275. [2021-06-05 22:04:55,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.1934306569343067) internal successors, (601), 274 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:55,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 601 transitions. [2021-06-05 22:04:55,849 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 601 transitions. Word has length 20 [2021-06-05 22:04:55,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:55,849 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 601 transitions. [2021-06-05 22:04:55,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:55,849 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 601 transitions. [2021-06-05 22:04:55,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:55,849 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:55,849 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:56,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 878 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4075 [2021-06-05 22:04:56,050 INFO L430 AbstractCegarLoop]: === Iteration 884 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:56,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:56,050 INFO L82 PathProgramCache]: Analyzing trace with hash 2049218658, now seen corresponding path program 878 times [2021-06-05 22:04:56,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:56,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020809954] [2021-06-05 22:04:56,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:56,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:56,274 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:56,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:56,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020809954] [2021-06-05 22:04:56,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020809954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:56,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669190653] [2021-06-05 22:04:56,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 879 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 879 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:56,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:04:56,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:56,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:04:56,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:56,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:56,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:56,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:56,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:56,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:56,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:56,485 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:56,546 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-06-05 22:04:56,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:56,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:56,549 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:56,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:56,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:56,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:04:56,575 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:56,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:56,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:56,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:04:56,601 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:56,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:56,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:04:56,623 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:04:56,710 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:56,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669190653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:56,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:56,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 22:04:56,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861449957] [2021-06-05 22:04:56,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:04:56,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:56,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:04:56,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:04:56,711 INFO L87 Difference]: Start difference. First operand 275 states and 601 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:57,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:57,716 INFO L93 Difference]: Finished difference Result 400 states and 827 transitions. [2021-06-05 22:04:57,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:04:57,717 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:57,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:57,717 INFO L225 Difference]: With dead ends: 400 [2021-06-05 22:04:57,717 INFO L226 Difference]: Without dead ends: 367 [2021-06-05 22:04:57,717 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 1044.3ms TimeCoverageRelationStatistics Valid=151, Invalid=1181, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:04:57,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-06-05 22:04:57,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 274. [2021-06-05 22:04:57,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.1941391941391943) internal successors, (599), 273 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:57,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 599 transitions. [2021-06-05 22:04:57,720 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 599 transitions. Word has length 20 [2021-06-05 22:04:57,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:57,720 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 599 transitions. [2021-06-05 22:04:57,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:57,720 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 599 transitions. [2021-06-05 22:04:57,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:57,720 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:57,720 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:57,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4080,879 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:57,921 INFO L430 AbstractCegarLoop]: === Iteration 885 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:57,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:57,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1163420378, now seen corresponding path program 879 times [2021-06-05 22:04:57,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:57,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660711976] [2021-06-05 22:04:57,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:57,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:58,148 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:58,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:58,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660711976] [2021-06-05 22:04:58,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660711976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:58,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425944177] [2021-06-05 22:04:58,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 880 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 880 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:58,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:04:58,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:58,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:04:58,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:58,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:58,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:58,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:58,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:58,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:58,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:58,396 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:58,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:58,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:58,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:04:58,428 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:58,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:58,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:58,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:04:58,452 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:58,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:58,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:04:58,472 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-06-05 22:04:58,565 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:58,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425944177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:58,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:58,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 22:04:58,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865946065] [2021-06-05 22:04:58,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:04:58,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:58,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:04:58,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:04:58,566 INFO L87 Difference]: Start difference. First operand 274 states and 599 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:58,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:58,993 INFO L93 Difference]: Finished difference Result 316 states and 674 transitions. [2021-06-05 22:04:58,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:04:58,994 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:04:58,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:58,994 INFO L225 Difference]: With dead ends: 316 [2021-06-05 22:04:58,994 INFO L226 Difference]: Without dead ends: 302 [2021-06-05 22:04:58,994 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 569.7ms TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:04:58,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-06-05 22:04:58,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 275. [2021-06-05 22:04:58,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.197080291970803) internal successors, (602), 274 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:58,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 602 transitions. [2021-06-05 22:04:58,996 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 602 transitions. Word has length 20 [2021-06-05 22:04:58,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:58,996 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 602 transitions. [2021-06-05 22:04:58,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:58,996 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 602 transitions. [2021-06-05 22:04:58,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:04:58,997 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:58,997 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:59,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4085,880 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:59,197 INFO L430 AbstractCegarLoop]: === Iteration 886 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:59,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:59,197 INFO L82 PathProgramCache]: Analyzing trace with hash -526522526, now seen corresponding path program 880 times [2021-06-05 22:04:59,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:59,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303022420] [2021-06-05 22:04:59,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:59,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:59,413 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:59,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:59,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303022420] [2021-06-05 22:04:59,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303022420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:59,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558510110] [2021-06-05 22:04:59,413 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 881 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 881 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:04:59,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:04:59,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:04:59,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:04:59,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:04:59,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:59,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:59,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:59,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:59,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:59,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:59,679 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:59,741 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-06-05 22:04:59,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:59,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:04:59,746 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:59,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:59,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:59,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:04:59,773 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:04:59,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:59,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:04:59,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:04:59,799 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:04:59,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:04:59,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:04:59,821 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:04:59,903 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:59,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558510110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:04:59,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:04:59,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 22:04:59,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114732940] [2021-06-05 22:04:59,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:04:59,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:59,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:04:59,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:04:59,903 INFO L87 Difference]: Start difference. First operand 275 states and 602 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:00,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:00,395 INFO L93 Difference]: Finished difference Result 340 states and 719 transitions. [2021-06-05 22:05:00,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:05:00,395 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:00,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:00,395 INFO L225 Difference]: With dead ends: 340 [2021-06-05 22:05:00,395 INFO L226 Difference]: Without dead ends: 321 [2021-06-05 22:05:00,395 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 592.7ms TimeCoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:05:00,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-06-05 22:05:00,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 275. [2021-06-05 22:05:00,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.197080291970803) internal successors, (602), 274 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:00,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 602 transitions. [2021-06-05 22:05:00,398 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 602 transitions. Word has length 20 [2021-06-05 22:05:00,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:00,398 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 602 transitions. [2021-06-05 22:05:00,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:00,398 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 602 transitions. [2021-06-05 22:05:00,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:00,398 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:00,398 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:00,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 881 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4092 [2021-06-05 22:05:00,598 INFO L430 AbstractCegarLoop]: === Iteration 887 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:00,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:00,599 INFO L82 PathProgramCache]: Analyzing trace with hash 64781686, now seen corresponding path program 881 times [2021-06-05 22:05:00,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:00,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092356910] [2021-06-05 22:05:00,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:00,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:00,787 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:00,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:00,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092356910] [2021-06-05 22:05:00,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092356910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:00,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155126543] [2021-06-05 22:05:00,788 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 882 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 882 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:00,814 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:05:00,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:00,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:05:00,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:00,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:00,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:00,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:05:00,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:00,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:00,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 22:05:00,947 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:00,970 INFO L628 ElimStorePlain]: treesize reduction 42, result has 44.0 percent of original size [2021-06-05 22:05:00,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:00,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:05:00,972 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:00,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:00,980 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:05:00,980 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-06-05 22:05:01,017 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:01,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155126543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:01,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:01,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 22:05:01,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744409684] [2021-06-05 22:05:01,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:05:01,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:01,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:05:01,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:05:01,018 INFO L87 Difference]: Start difference. First operand 275 states and 602 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:01,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:01,566 INFO L93 Difference]: Finished difference Result 313 states and 670 transitions. [2021-06-05 22:05:01,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:05:01,566 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:01,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:01,567 INFO L225 Difference]: With dead ends: 313 [2021-06-05 22:05:01,567 INFO L226 Difference]: Without dead ends: 300 [2021-06-05 22:05:01,567 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 536.0ms TimeCoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:05:01,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-06-05 22:05:01,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 276. [2021-06-05 22:05:01,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.1963636363636363) internal successors, (604), 275 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:01,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 604 transitions. [2021-06-05 22:05:01,569 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 604 transitions. Word has length 20 [2021-06-05 22:05:01,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:01,569 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 604 transitions. [2021-06-05 22:05:01,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:01,569 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 604 transitions. [2021-06-05 22:05:01,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:01,569 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:01,569 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:01,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4097,882 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:01,785 INFO L430 AbstractCegarLoop]: === Iteration 888 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:01,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:01,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1200966958, now seen corresponding path program 882 times [2021-06-05 22:05:01,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:01,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883643480] [2021-06-05 22:05:01,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:01,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:02,012 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:02,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:02,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883643480] [2021-06-05 22:05:02,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883643480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:02,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200433849] [2021-06-05 22:05:02,012 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 883 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 883 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:02,042 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:05:02,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:02,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:05:02,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:02,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:02,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:02,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:05:02,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:02,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:02,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:02,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:05:02,154 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:02,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:02,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:02,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:05:02,158 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:02,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:02,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:05:02,162 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:02,217 INFO L628 ElimStorePlain]: treesize reduction 83, result has 45.8 percent of original size [2021-06-05 22:05:02,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:02,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:02,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:05:02,222 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:05:02,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:02,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:05:02,226 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:05:02,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:02,250 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:05:02,250 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-06-05 22:05:02,338 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:02,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200433849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:02,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:02,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 22:05:02,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513842247] [2021-06-05 22:05:02,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:05:02,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:02,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:05:02,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:05:02,338 INFO L87 Difference]: Start difference. First operand 276 states and 604 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:03,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:03,202 INFO L93 Difference]: Finished difference Result 337 states and 708 transitions. [2021-06-05 22:05:03,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:05:03,203 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:03,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:03,203 INFO L225 Difference]: With dead ends: 337 [2021-06-05 22:05:03,203 INFO L226 Difference]: Without dead ends: 318 [2021-06-05 22:05:03,203 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 863.6ms TimeCoverageRelationStatistics Valid=126, Invalid=1206, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:05:03,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-06-05 22:05:03,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 275. [2021-06-05 22:05:03,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.197080291970803) internal successors, (602), 274 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:03,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 602 transitions. [2021-06-05 22:05:03,205 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 602 transitions. Word has length 20 [2021-06-05 22:05:03,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:03,205 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 602 transitions. [2021-06-05 22:05:03,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:03,206 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 602 transitions. [2021-06-05 22:05:03,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:03,206 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:03,206 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:03,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 883 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4098 [2021-06-05 22:05:03,406 INFO L430 AbstractCegarLoop]: === Iteration 889 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:03,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:03,406 INFO L82 PathProgramCache]: Analyzing trace with hash -945203802, now seen corresponding path program 883 times [2021-06-05 22:05:03,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:03,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664575805] [2021-06-05 22:05:03,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:03,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:03,653 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:03,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:03,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664575805] [2021-06-05 22:05:03,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664575805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:03,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101766798] [2021-06-05 22:05:03,654 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 884 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 884 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:03,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:03,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:05:03,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:03,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:03,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:03,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:05:03,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:03,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:03,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:05:03,819 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:03,884 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-06-05 22:05:03,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:03,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:05:03,888 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:05:03,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:03,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:03,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:05:03,914 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:03,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:03,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:03,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:05:03,940 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:05:03,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:03,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:05:03,962 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:05:04,047 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:04,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101766798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:04,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:04,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 22:05:04,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918348804] [2021-06-05 22:05:04,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:05:04,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:04,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:05:04,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:05:04,048 INFO L87 Difference]: Start difference. First operand 275 states and 602 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:05,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:05,023 INFO L93 Difference]: Finished difference Result 367 states and 763 transitions. [2021-06-05 22:05:05,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:05:05,023 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:05,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:05,023 INFO L225 Difference]: With dead ends: 367 [2021-06-05 22:05:05,023 INFO L226 Difference]: Without dead ends: 341 [2021-06-05 22:05:05,024 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1039.9ms TimeCoverageRelationStatistics Valid=158, Invalid=1324, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:05:05,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-06-05 22:05:05,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 277. [2021-06-05 22:05:05,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 2.1956521739130435) internal successors, (606), 276 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:05,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 606 transitions. [2021-06-05 22:05:05,026 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 606 transitions. Word has length 20 [2021-06-05 22:05:05,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:05,026 INFO L482 AbstractCegarLoop]: Abstraction has 277 states and 606 transitions. [2021-06-05 22:05:05,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:05,026 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 606 transitions. [2021-06-05 22:05:05,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:05,026 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:05,026 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:05,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4101,884 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:05,227 INFO L430 AbstractCegarLoop]: === Iteration 890 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:05,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:05,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1242979374, now seen corresponding path program 884 times [2021-06-05 22:05:05,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:05,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196764251] [2021-06-05 22:05:05,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:05,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:05,458 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:05,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:05,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196764251] [2021-06-05 22:05:05,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196764251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:05,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614078435] [2021-06-05 22:05:05,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 885 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 885 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:05,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:05:05,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:05,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:05:05,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:05,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:05,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:05,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:05:05,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:05,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:05,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:05:05,665 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:05,727 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-06-05 22:05:05,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:05,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:05:05,731 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:05,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:05,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:05,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:05:05,758 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:05:05,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:05,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:05,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:05:05,786 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:05:05,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:05,808 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:05:05,809 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:05:05,905 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:05,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614078435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:05,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:05,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 22:05:05,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709085822] [2021-06-05 22:05:05,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:05:05,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:05,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:05:05,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:05:05,906 INFO L87 Difference]: Start difference. First operand 277 states and 606 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:07,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:07,087 INFO L93 Difference]: Finished difference Result 405 states and 837 transitions. [2021-06-05 22:05:07,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:05:07,088 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:07,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:07,088 INFO L225 Difference]: With dead ends: 405 [2021-06-05 22:05:07,088 INFO L226 Difference]: Without dead ends: 372 [2021-06-05 22:05:07,088 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1165.1ms TimeCoverageRelationStatistics Valid=159, Invalid=1247, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:05:07,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-06-05 22:05:07,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 277. [2021-06-05 22:05:07,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 2.1956521739130435) internal successors, (606), 276 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:07,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 606 transitions. [2021-06-05 22:05:07,091 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 606 transitions. Word has length 20 [2021-06-05 22:05:07,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:07,091 INFO L482 AbstractCegarLoop]: Abstraction has 277 states and 606 transitions. [2021-06-05 22:05:07,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:07,091 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 606 transitions. [2021-06-05 22:05:07,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:07,091 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:07,091 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:07,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4106,885 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:07,292 INFO L430 AbstractCegarLoop]: === Iteration 891 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:07,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:07,292 INFO L82 PathProgramCache]: Analyzing trace with hash 357181094, now seen corresponding path program 885 times [2021-06-05 22:05:07,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:07,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166194330] [2021-06-05 22:05:07,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:07,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:07,548 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:07,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:07,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166194330] [2021-06-05 22:05:07,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166194330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:07,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936358387] [2021-06-05 22:05:07,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 886 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 886 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:07,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:05:07,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:07,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:05:07,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:07,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:07,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:05:07,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:07,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:07,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:07,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:05:07,811 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:05:07,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:07,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:07,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:05:07,837 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:07,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:07,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:07,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:05:07,862 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:05:07,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:07,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:05:07,883 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-06-05 22:05:07,986 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:07,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936358387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:07,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:07,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 22:05:07,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609029309] [2021-06-05 22:05:07,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:05:07,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:07,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:05:07,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:05:07,987 INFO L87 Difference]: Start difference. First operand 277 states and 606 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:08,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:08,485 INFO L93 Difference]: Finished difference Result 338 states and 716 transitions. [2021-06-05 22:05:08,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:05:08,485 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:08,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:08,485 INFO L225 Difference]: With dead ends: 338 [2021-06-05 22:05:08,485 INFO L226 Difference]: Without dead ends: 324 [2021-06-05 22:05:08,485 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 654.8ms TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:05:08,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-06-05 22:05:08,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 277. [2021-06-05 22:05:08,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 2.1956521739130435) internal successors, (606), 276 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:08,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 606 transitions. [2021-06-05 22:05:08,488 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 606 transitions. Word has length 20 [2021-06-05 22:05:08,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:08,488 INFO L482 AbstractCegarLoop]: Abstraction has 277 states and 606 transitions. [2021-06-05 22:05:08,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:08,488 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 606 transitions. [2021-06-05 22:05:08,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:08,488 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:08,488 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:08,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 886 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4111 [2021-06-05 22:05:08,688 INFO L430 AbstractCegarLoop]: === Iteration 892 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:08,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:08,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1332761810, now seen corresponding path program 886 times [2021-06-05 22:05:08,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:08,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309460967] [2021-06-05 22:05:08,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:08,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:08,957 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:08,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:08,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309460967] [2021-06-05 22:05:08,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309460967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:08,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696426982] [2021-06-05 22:05:08,957 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 887 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 887 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:08,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:05:08,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:08,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:05:08,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:09,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:09,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:09,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:05:09,211 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:09,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:09,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:05:09,215 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:09,276 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-06-05 22:05:09,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:09,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:05:09,280 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:05:09,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:09,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:09,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:05:09,309 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:09,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:09,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:09,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:05:09,335 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:05:09,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:09,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:05:09,357 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:05:09,506 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:09,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696426982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:09,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:09,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 22:05:09,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092517043] [2021-06-05 22:05:09,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:05:09,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:09,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:05:09,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:05:09,506 INFO L87 Difference]: Start difference. First operand 277 states and 606 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:10,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:10,807 INFO L93 Difference]: Finished difference Result 428 states and 871 transitions. [2021-06-05 22:05:10,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:05:10,808 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:10,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:10,808 INFO L225 Difference]: With dead ends: 428 [2021-06-05 22:05:10,808 INFO L226 Difference]: Without dead ends: 381 [2021-06-05 22:05:10,808 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1412.5ms TimeCoverageRelationStatistics Valid=164, Invalid=892, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:05:10,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-06-05 22:05:10,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 283. [2021-06-05 22:05:10,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.2127659574468086) internal successors, (624), 282 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:10,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 624 transitions. [2021-06-05 22:05:10,811 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 624 transitions. Word has length 20 [2021-06-05 22:05:10,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:10,811 INFO L482 AbstractCegarLoop]: Abstraction has 283 states and 624 transitions. [2021-06-05 22:05:10,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:10,811 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 624 transitions. [2021-06-05 22:05:10,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:10,811 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:10,811 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:11,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 887 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4118 [2021-06-05 22:05:11,012 INFO L430 AbstractCegarLoop]: === Iteration 893 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:11,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:11,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1689271778, now seen corresponding path program 887 times [2021-06-05 22:05:11,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:11,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808171921] [2021-06-05 22:05:11,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:11,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:11,269 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:11,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:11,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808171921] [2021-06-05 22:05:11,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808171921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:11,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893572285] [2021-06-05 22:05:11,270 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 888 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 888 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:11,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:05:11,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:11,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:05:11,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:11,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:11,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:11,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:05:11,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:11,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:11,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:05:11,578 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:11,641 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-06-05 22:05:11,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:11,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 22:05:11,645 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:11,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:11,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:11,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:05:11,672 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:05:11,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:11,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:11,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:05:11,699 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:05:11,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:11,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:05:11,721 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-06-05 22:05:11,808 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:11,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893572285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:11,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:11,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 22:05:11,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359862983] [2021-06-05 22:05:11,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:05:11,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:11,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:05:11,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:05:11,809 INFO L87 Difference]: Start difference. First operand 283 states and 624 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:12,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:12,371 INFO L93 Difference]: Finished difference Result 358 states and 765 transitions. [2021-06-05 22:05:12,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:05:12,371 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:12,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:12,371 INFO L225 Difference]: With dead ends: 358 [2021-06-05 22:05:12,371 INFO L226 Difference]: Without dead ends: 346 [2021-06-05 22:05:12,371 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 699.1ms TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:05:12,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-06-05 22:05:12,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 288. [2021-06-05 22:05:12,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 2.21602787456446) internal successors, (636), 287 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:12,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 636 transitions. [2021-06-05 22:05:12,374 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 636 transitions. Word has length 20 [2021-06-05 22:05:12,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:12,374 INFO L482 AbstractCegarLoop]: Abstraction has 288 states and 636 transitions. [2021-06-05 22:05:12,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:12,374 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 636 transitions. [2021-06-05 22:05:12,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:12,374 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:12,374 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:12,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 888 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4123 [2021-06-05 22:05:12,575 INFO L430 AbstractCegarLoop]: === Iteration 894 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:12,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:12,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1317745914, now seen corresponding path program 888 times [2021-06-05 22:05:12,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:12,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144289790] [2021-06-05 22:05:12,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:12,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:12,726 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:12,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:12,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144289790] [2021-06-05 22:05:12,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144289790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:12,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918680787] [2021-06-05 22:05:12,727 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 889 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 889 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:12,759 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:05:12,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:12,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:05:12,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:12,963 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:12,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918680787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:12,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:12,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 22:05:12,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372096057] [2021-06-05 22:05:12,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:05:12,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:12,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:05:12,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:12,964 INFO L87 Difference]: Start difference. First operand 288 states and 636 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:13,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:13,530 INFO L93 Difference]: Finished difference Result 339 states and 721 transitions. [2021-06-05 22:05:13,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:05:13,530 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:13,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:13,530 INFO L225 Difference]: With dead ends: 339 [2021-06-05 22:05:13,530 INFO L226 Difference]: Without dead ends: 319 [2021-06-05 22:05:13,531 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 625.5ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:05:13,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-06-05 22:05:13,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 283. [2021-06-05 22:05:13,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.219858156028369) internal successors, (626), 282 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:13,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 626 transitions. [2021-06-05 22:05:13,533 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 626 transitions. Word has length 21 [2021-06-05 22:05:13,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:13,533 INFO L482 AbstractCegarLoop]: Abstraction has 283 states and 626 transitions. [2021-06-05 22:05:13,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:13,533 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 626 transitions. [2021-06-05 22:05:13,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:13,533 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:13,533 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:13,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4128,889 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:13,734 INFO L430 AbstractCegarLoop]: === Iteration 895 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:13,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:13,734 INFO L82 PathProgramCache]: Analyzing trace with hash 799042326, now seen corresponding path program 889 times [2021-06-05 22:05:13,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:13,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630874667] [2021-06-05 22:05:13,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:13,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:13,849 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:13,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:13,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630874667] [2021-06-05 22:05:13,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630874667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:13,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414641281] [2021-06-05 22:05:13,850 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 890 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 890 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:13,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:13,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:05:13,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:13,998 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:13,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414641281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:13,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:13,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 17 [2021-06-05 22:05:13,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413023744] [2021-06-05 22:05:13,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:05:13,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:13,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:05:13,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:05:13,998 INFO L87 Difference]: Start difference. First operand 283 states and 626 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:14,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:14,149 INFO L93 Difference]: Finished difference Result 339 states and 729 transitions. [2021-06-05 22:05:14,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:05:14,150 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:14,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:14,150 INFO L225 Difference]: With dead ends: 339 [2021-06-05 22:05:14,150 INFO L226 Difference]: Without dead ends: 339 [2021-06-05 22:05:14,150 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 194.6ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:05:14,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-06-05 22:05:14,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 284. [2021-06-05 22:05:14,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.222614840989399) internal successors, (629), 283 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:14,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 629 transitions. [2021-06-05 22:05:14,152 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 629 transitions. Word has length 21 [2021-06-05 22:05:14,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:14,152 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 629 transitions. [2021-06-05 22:05:14,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:14,153 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 629 transitions. [2021-06-05 22:05:14,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:14,153 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:14,153 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:14,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 890 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4134 [2021-06-05 22:05:14,353 INFO L430 AbstractCegarLoop]: === Iteration 896 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:14,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:14,354 INFO L82 PathProgramCache]: Analyzing trace with hash 951908934, now seen corresponding path program 890 times [2021-06-05 22:05:14,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:14,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593314821] [2021-06-05 22:05:14,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:14,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:14,466 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:14,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:14,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593314821] [2021-06-05 22:05:14,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593314821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:14,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605039359] [2021-06-05 22:05:14,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 891 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 891 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:14,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:05:14,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:14,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 22:05:14,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:14,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:14,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:14,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 22:05:14,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:14,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:14,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 22:05:14,693 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:14,710 INFO L628 ElimStorePlain]: treesize reduction 36, result has 29.4 percent of original size [2021-06-05 22:05:14,710 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 22:05:14,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:05:14,711 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 22:05:14,901 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:14,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605039359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:14,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:14,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 22:05:14,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406776235] [2021-06-05 22:05:14,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:05:14,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:14,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:05:14,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:05:14,902 INFO L87 Difference]: Start difference. First operand 284 states and 629 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:15,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:15,255 INFO L93 Difference]: Finished difference Result 363 states and 777 transitions. [2021-06-05 22:05:15,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:05:15,256 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:15,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:15,256 INFO L225 Difference]: With dead ends: 363 [2021-06-05 22:05:15,256 INFO L226 Difference]: Without dead ends: 363 [2021-06-05 22:05:15,256 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 428.2ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:05:15,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-06-05 22:05:15,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 284. [2021-06-05 22:05:15,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.222614840989399) internal successors, (629), 283 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:15,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 629 transitions. [2021-06-05 22:05:15,259 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 629 transitions. Word has length 21 [2021-06-05 22:05:15,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:15,259 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 629 transitions. [2021-06-05 22:05:15,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:15,259 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 629 transitions. [2021-06-05 22:05:15,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:15,259 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:15,259 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:15,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4137,891 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:15,460 INFO L430 AbstractCegarLoop]: === Iteration 897 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:15,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:15,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1279855594, now seen corresponding path program 891 times [2021-06-05 22:05:15,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:15,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483754387] [2021-06-05 22:05:15,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:15,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:15,567 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:15,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:15,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483754387] [2021-06-05 22:05:15,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483754387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:15,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026518414] [2021-06-05 22:05:15,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 892 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 892 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:15,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:05:15,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:15,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:05:15,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:15,786 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:15,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026518414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:15,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:15,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 22:05:15,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199557140] [2021-06-05 22:05:15,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:05:15,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:15,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:05:15,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:15,786 INFO L87 Difference]: Start difference. First operand 284 states and 629 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:16,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:16,112 INFO L93 Difference]: Finished difference Result 359 states and 769 transitions. [2021-06-05 22:05:16,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:05:16,113 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:16,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:16,113 INFO L225 Difference]: With dead ends: 359 [2021-06-05 22:05:16,113 INFO L226 Difference]: Without dead ends: 359 [2021-06-05 22:05:16,113 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 318.4ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:05:16,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-05 22:05:16,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 284. [2021-06-05 22:05:16,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.222614840989399) internal successors, (629), 283 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:16,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 629 transitions. [2021-06-05 22:05:16,116 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 629 transitions. Word has length 21 [2021-06-05 22:05:16,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:16,116 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 629 transitions. [2021-06-05 22:05:16,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:16,116 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 629 transitions. [2021-06-05 22:05:16,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:16,116 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:16,116 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:16,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4139,892 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:16,317 INFO L430 AbstractCegarLoop]: === Iteration 898 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:16,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:16,317 INFO L82 PathProgramCache]: Analyzing trace with hash -763524718, now seen corresponding path program 892 times [2021-06-05 22:05:16,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:16,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643952052] [2021-06-05 22:05:16,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:16,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:16,496 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:16,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:16,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643952052] [2021-06-05 22:05:16,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643952052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:16,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910984206] [2021-06-05 22:05:16,497 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 893 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 893 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:16,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:05:16,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:16,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:05:16,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:16,761 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:16,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910984206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:16,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:16,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 22:05:16,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106624568] [2021-06-05 22:05:16,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:05:16,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:16,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:05:16,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:16,761 INFO L87 Difference]: Start difference. First operand 284 states and 629 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:17,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:17,433 INFO L93 Difference]: Finished difference Result 332 states and 709 transitions. [2021-06-05 22:05:17,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:05:17,433 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:17,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:17,434 INFO L225 Difference]: With dead ends: 332 [2021-06-05 22:05:17,434 INFO L226 Difference]: Without dead ends: 323 [2021-06-05 22:05:17,434 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 726.1ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:05:17,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-06-05 22:05:17,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 284. [2021-06-05 22:05:17,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.2190812720848054) internal successors, (628), 283 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:17,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 628 transitions. [2021-06-05 22:05:17,436 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 628 transitions. Word has length 21 [2021-06-05 22:05:17,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:17,436 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 628 transitions. [2021-06-05 22:05:17,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:17,436 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 628 transitions. [2021-06-05 22:05:17,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:17,437 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:17,437 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:17,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 893 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4143 [2021-06-05 22:05:17,637 INFO L430 AbstractCegarLoop]: === Iteration 899 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:17,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:17,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1213300666, now seen corresponding path program 893 times [2021-06-05 22:05:17,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:17,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21641939] [2021-06-05 22:05:17,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:17,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:17,742 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:17,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:17,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21641939] [2021-06-05 22:05:17,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21641939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:17,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640895205] [2021-06-05 22:05:17,743 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 894 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 894 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:17,774 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:05:17,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:17,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 22:05:17,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:17,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:17,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:17,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 22:05:17,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:17,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:17,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 22:05:17,988 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:18,005 INFO L628 ElimStorePlain]: treesize reduction 36, result has 29.4 percent of original size [2021-06-05 22:05:18,005 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 22:05:18,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:05:18,006 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 22:05:18,026 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:18,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640895205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:18,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:18,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 22:05:18,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007696934] [2021-06-05 22:05:18,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:05:18,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:18,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:05:18,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:05:18,027 INFO L87 Difference]: Start difference. First operand 284 states and 628 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:18,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:18,361 INFO L93 Difference]: Finished difference Result 355 states and 760 transitions. [2021-06-05 22:05:18,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:05:18,361 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:18,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:18,361 INFO L225 Difference]: With dead ends: 355 [2021-06-05 22:05:18,362 INFO L226 Difference]: Without dead ends: 355 [2021-06-05 22:05:18,362 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 352.5ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:05:18,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-06-05 22:05:18,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 284. [2021-06-05 22:05:18,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.2190812720848054) internal successors, (628), 283 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:18,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 628 transitions. [2021-06-05 22:05:18,364 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 628 transitions. Word has length 21 [2021-06-05 22:05:18,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:18,364 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 628 transitions. [2021-06-05 22:05:18,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:18,364 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 628 transitions. [2021-06-05 22:05:18,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:18,364 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:18,364 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:18,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4149,894 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:18,565 INFO L430 AbstractCegarLoop]: === Iteration 900 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:18,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:18,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1836887574, now seen corresponding path program 894 times [2021-06-05 22:05:18,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:18,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620616416] [2021-06-05 22:05:18,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:18,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:18,713 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:18,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:18,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620616416] [2021-06-05 22:05:18,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620616416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:18,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226221300] [2021-06-05 22:05:18,713 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 895 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 895 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:18,740 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:05:18,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:18,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:05:18,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:18,956 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:18,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226221300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:18,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:18,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 22:05:18,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293286886] [2021-06-05 22:05:18,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:05:18,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:18,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:05:18,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:18,956 INFO L87 Difference]: Start difference. First operand 284 states and 628 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:19,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:19,269 INFO L93 Difference]: Finished difference Result 351 states and 752 transitions. [2021-06-05 22:05:19,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:05:19,270 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:19,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:19,270 INFO L225 Difference]: With dead ends: 351 [2021-06-05 22:05:19,270 INFO L226 Difference]: Without dead ends: 351 [2021-06-05 22:05:19,270 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 363.7ms TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:05:19,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-06-05 22:05:19,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 284. [2021-06-05 22:05:19,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.2190812720848054) internal successors, (628), 283 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:19,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 628 transitions. [2021-06-05 22:05:19,272 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 628 transitions. Word has length 21 [2021-06-05 22:05:19,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:19,273 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 628 transitions. [2021-06-05 22:05:19,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:19,273 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 628 transitions. [2021-06-05 22:05:19,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:19,273 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:19,273 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:19,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 895 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4151 [2021-06-05 22:05:19,473 INFO L430 AbstractCegarLoop]: === Iteration 901 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:19,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:19,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1050833554, now seen corresponding path program 895 times [2021-06-05 22:05:19,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:19,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276563209] [2021-06-05 22:05:19,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:19,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:19,630 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:19,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:19,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276563209] [2021-06-05 22:05:19,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276563209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:19,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279382598] [2021-06-05 22:05:19,631 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 896 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 896 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:19,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:19,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:05:19,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:19,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:19,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:19,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:05:19,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:19,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:19,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:05:19,891 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:19,929 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-06-05 22:05:19,930 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 22:05:19,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:05:19,932 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:19,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:19,945 INFO L518 ElimStorePlain]: Eliminatee v_prenex_775 vanished before elimination [2021-06-05 22:05:19,945 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:05:19,945 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 22:05:19,977 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:19,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279382598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:19,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:19,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 22:05:19,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957177407] [2021-06-05 22:05:19,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:05:19,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:19,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:05:19,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:19,978 INFO L87 Difference]: Start difference. First operand 284 states and 628 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:20,920 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 75 [2021-06-05 22:05:21,053 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 58 [2021-06-05 22:05:21,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:21,099 INFO L93 Difference]: Finished difference Result 342 states and 725 transitions. [2021-06-05 22:05:21,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:05:21,099 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:21,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:21,100 INFO L225 Difference]: With dead ends: 342 [2021-06-05 22:05:21,100 INFO L226 Difference]: Without dead ends: 339 [2021-06-05 22:05:21,100 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1134.5ms TimeCoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:05:21,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-06-05 22:05:21,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 289. [2021-06-05 22:05:21,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.21875) internal successors, (639), 288 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:21,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 639 transitions. [2021-06-05 22:05:21,102 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 639 transitions. Word has length 21 [2021-06-05 22:05:21,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:21,102 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 639 transitions. [2021-06-05 22:05:21,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:21,102 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 639 transitions. [2021-06-05 22:05:21,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:21,102 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:21,103 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:21,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 896 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4155 [2021-06-05 22:05:21,303 INFO L430 AbstractCegarLoop]: === Iteration 902 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:21,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:21,303 INFO L82 PathProgramCache]: Analyzing trace with hash 826902086, now seen corresponding path program 896 times [2021-06-05 22:05:21,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:21,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215433762] [2021-06-05 22:05:21,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:21,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:21,410 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:21,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:21,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215433762] [2021-06-05 22:05:21,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215433762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:21,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795010410] [2021-06-05 22:05:21,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 897 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 897 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:21,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:05:21,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:21,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 22:05:21,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:21,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:21,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:21,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 22:05:21,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:21,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:21,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 22:05:21,631 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:21,680 INFO L628 ElimStorePlain]: treesize reduction 72, result has 39.5 percent of original size [2021-06-05 22:05:21,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:05:21,683 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:21,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:21,702 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 22:05:21,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:21,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 22:05:21,705 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:05:21,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:21,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:05:21,722 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-06-05 22:05:21,781 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:21,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795010410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:21,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:21,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 22:05:21,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460143637] [2021-06-05 22:05:21,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:05:21,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:21,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:05:21,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:05:21,782 INFO L87 Difference]: Start difference. First operand 289 states and 639 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:22,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:22,229 INFO L93 Difference]: Finished difference Result 352 states and 755 transitions. [2021-06-05 22:05:22,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:05:22,230 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:22,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:22,230 INFO L225 Difference]: With dead ends: 352 [2021-06-05 22:05:22,230 INFO L226 Difference]: Without dead ends: 352 [2021-06-05 22:05:22,230 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 425.7ms TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:05:22,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-06-05 22:05:22,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 289. [2021-06-05 22:05:22,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.21875) internal successors, (639), 288 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:22,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 639 transitions. [2021-06-05 22:05:22,233 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 639 transitions. Word has length 21 [2021-06-05 22:05:22,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:22,233 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 639 transitions. [2021-06-05 22:05:22,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:22,233 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 639 transitions. [2021-06-05 22:05:22,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:22,233 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:22,233 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:22,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 897 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4163 [2021-06-05 22:05:22,434 INFO L430 AbstractCegarLoop]: === Iteration 903 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:22,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:22,434 INFO L82 PathProgramCache]: Analyzing trace with hash -2107948470, now seen corresponding path program 897 times [2021-06-05 22:05:22,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:22,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567607849] [2021-06-05 22:05:22,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:22,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:22,591 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:22,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:22,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567607849] [2021-06-05 22:05:22,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567607849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:22,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924401926] [2021-06-05 22:05:22,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 898 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 898 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:22,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:05:22,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:22,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:05:22,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:22,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:22,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:22,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:05:22,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:22,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:22,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:05:22,852 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:22,890 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-06-05 22:05:22,891 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 22:05:22,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:05:22,898 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:22,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:22,910 INFO L518 ElimStorePlain]: Eliminatee v_prenex_781 vanished before elimination [2021-06-05 22:05:22,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:05:22,911 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 22:05:22,942 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:22,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924401926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:22,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:22,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 22:05:22,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265833221] [2021-06-05 22:05:22,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:05:22,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:22,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:05:22,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:22,943 INFO L87 Difference]: Start difference. First operand 289 states and 639 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:23,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:23,609 INFO L93 Difference]: Finished difference Result 327 states and 704 transitions. [2021-06-05 22:05:23,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:05:23,609 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:23,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:23,610 INFO L225 Difference]: With dead ends: 327 [2021-06-05 22:05:23,610 INFO L226 Difference]: Without dead ends: 327 [2021-06-05 22:05:23,610 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 704.6ms TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:05:23,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-06-05 22:05:23,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 285. [2021-06-05 22:05:23,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.2183098591549295) internal successors, (630), 284 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:23,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 630 transitions. [2021-06-05 22:05:23,612 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 630 transitions. Word has length 21 [2021-06-05 22:05:23,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:23,612 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 630 transitions. [2021-06-05 22:05:23,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:23,612 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 630 transitions. [2021-06-05 22:05:23,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:23,613 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:23,613 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:23,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 898 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4167 [2021-06-05 22:05:23,813 INFO L430 AbstractCegarLoop]: === Iteration 904 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:23,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:23,813 INFO L82 PathProgramCache]: Analyzing trace with hash 683162506, now seen corresponding path program 898 times [2021-06-05 22:05:23,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:23,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851931647] [2021-06-05 22:05:23,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:23,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:23,910 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:23,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:23,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851931647] [2021-06-05 22:05:23,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851931647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:23,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090137294] [2021-06-05 22:05:23,910 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 899 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 899 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:23,936 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:05:23,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:23,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:05:23,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:24,111 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:24,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090137294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:24,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:24,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 22:05:24,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343350062] [2021-06-05 22:05:24,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:05:24,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:24,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:05:24,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:05:24,112 INFO L87 Difference]: Start difference. First operand 285 states and 630 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:24,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:24,309 INFO L93 Difference]: Finished difference Result 314 states and 685 transitions. [2021-06-05 22:05:24,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:05:24,309 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:24,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:24,309 INFO L225 Difference]: With dead ends: 314 [2021-06-05 22:05:24,309 INFO L226 Difference]: Without dead ends: 314 [2021-06-05 22:05:24,309 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 206.2ms TimeCoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:05:24,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-06-05 22:05:24,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 285. [2021-06-05 22:05:24,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.2183098591549295) internal successors, (630), 284 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:24,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 630 transitions. [2021-06-05 22:05:24,312 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 630 transitions. Word has length 21 [2021-06-05 22:05:24,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:24,312 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 630 transitions. [2021-06-05 22:05:24,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:24,312 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 630 transitions. [2021-06-05 22:05:24,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:24,312 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:24,312 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:24,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4174,899 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:24,512 INFO L430 AbstractCegarLoop]: === Iteration 905 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:24,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:24,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1548602022, now seen corresponding path program 899 times [2021-06-05 22:05:24,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:24,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719437247] [2021-06-05 22:05:24,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:24,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:24,616 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:24,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:24,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719437247] [2021-06-05 22:05:24,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719437247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:24,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104150756] [2021-06-05 22:05:24,616 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 900 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 900 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:24,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:05:24,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:24,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:05:24,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:24,820 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:24,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104150756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:24,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:24,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 22:05:24,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322202523] [2021-06-05 22:05:24,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:05:24,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:24,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:05:24,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:24,821 INFO L87 Difference]: Start difference. First operand 285 states and 630 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:25,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:25,008 INFO L93 Difference]: Finished difference Result 335 states and 727 transitions. [2021-06-05 22:05:25,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:05:25,008 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:25,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:25,009 INFO L225 Difference]: With dead ends: 335 [2021-06-05 22:05:25,009 INFO L226 Difference]: Without dead ends: 335 [2021-06-05 22:05:25,009 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 212.3ms TimeCoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:25,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-06-05 22:05:25,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 286. [2021-06-05 22:05:25,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.2175438596491226) internal successors, (632), 285 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:25,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 632 transitions. [2021-06-05 22:05:25,011 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 632 transitions. Word has length 21 [2021-06-05 22:05:25,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:25,011 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 632 transitions. [2021-06-05 22:05:25,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:25,011 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 632 transitions. [2021-06-05 22:05:25,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:25,012 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:25,012 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:25,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 900 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4178 [2021-06-05 22:05:25,212 INFO L430 AbstractCegarLoop]: === Iteration 906 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:25,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:25,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1482047094, now seen corresponding path program 900 times [2021-06-05 22:05:25,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:25,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348952202] [2021-06-05 22:05:25,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:25,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:25,319 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:25,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:25,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348952202] [2021-06-05 22:05:25,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348952202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:25,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862133137] [2021-06-05 22:05:25,319 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 901 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 901 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:25,346 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:05:25,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:25,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:05:25,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:25,534 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:25,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862133137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:25,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:25,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 22:05:25,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535728084] [2021-06-05 22:05:25,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:05:25,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:25,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:05:25,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:25,535 INFO L87 Difference]: Start difference. First operand 286 states and 632 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:25,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:25,767 INFO L93 Difference]: Finished difference Result 332 states and 721 transitions. [2021-06-05 22:05:25,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:05:25,768 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:25,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:25,768 INFO L225 Difference]: With dead ends: 332 [2021-06-05 22:05:25,768 INFO L226 Difference]: Without dead ends: 332 [2021-06-05 22:05:25,768 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 220.2ms TimeCoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:25,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-06-05 22:05:25,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 287. [2021-06-05 22:05:25,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 2.2167832167832167) internal successors, (634), 286 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:25,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 634 transitions. [2021-06-05 22:05:25,770 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 634 transitions. Word has length 21 [2021-06-05 22:05:25,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:25,770 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 634 transitions. [2021-06-05 22:05:25,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:25,771 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 634 transitions. [2021-06-05 22:05:25,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:25,771 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:25,771 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:25,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4182,901 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:25,971 INFO L430 AbstractCegarLoop]: === Iteration 907 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:25,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:25,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1568141146, now seen corresponding path program 901 times [2021-06-05 22:05:25,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:25,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10009974] [2021-06-05 22:05:25,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:25,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:26,101 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:26,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:26,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10009974] [2021-06-05 22:05:26,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10009974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:26,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554011786] [2021-06-05 22:05:26,101 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 902 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 902 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:26,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:26,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:05:26,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:26,332 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:26,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554011786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:26,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:26,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 22:05:26,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307398651] [2021-06-05 22:05:26,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:05:26,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:26,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:05:26,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:26,333 INFO L87 Difference]: Start difference. First operand 287 states and 634 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:26,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:26,644 INFO L93 Difference]: Finished difference Result 329 states and 715 transitions. [2021-06-05 22:05:26,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:05:26,644 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:26,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:26,644 INFO L225 Difference]: With dead ends: 329 [2021-06-05 22:05:26,644 INFO L226 Difference]: Without dead ends: 329 [2021-06-05 22:05:26,644 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 259.5ms TimeCoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:26,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-06-05 22:05:26,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 288. [2021-06-05 22:05:26,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 2.21602787456446) internal successors, (636), 287 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:26,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 636 transitions. [2021-06-05 22:05:26,647 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 636 transitions. Word has length 21 [2021-06-05 22:05:26,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:26,647 INFO L482 AbstractCegarLoop]: Abstraction has 288 states and 636 transitions. [2021-06-05 22:05:26,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:26,647 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 636 transitions. [2021-06-05 22:05:26,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:26,647 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:26,647 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:26,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 902 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4186 [2021-06-05 22:05:26,848 INFO L430 AbstractCegarLoop]: === Iteration 908 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:26,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:26,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1208224628, now seen corresponding path program 902 times [2021-06-05 22:05:26,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:26,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000326802] [2021-06-05 22:05:26,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:26,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:26,955 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:26,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:26,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000326802] [2021-06-05 22:05:26,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000326802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:26,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055386250] [2021-06-05 22:05:26,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 903 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 903 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:26,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:05:26,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:26,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 22:05:26,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:27,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:27,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:27,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 22:05:27,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:27,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:27,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 22:05:27,159 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:27,205 INFO L628 ElimStorePlain]: treesize reduction 80, result has 35.0 percent of original size [2021-06-05 22:05:27,205 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 22:05:27,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 22:05:27,208 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:27,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:27,225 INFO L518 ElimStorePlain]: Eliminatee v_prenex_787 vanished before elimination [2021-06-05 22:05:27,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:05:27,226 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-06-05 22:05:27,272 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:27,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055386250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:27,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:27,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 22:05:27,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489267742] [2021-06-05 22:05:27,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:05:27,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:27,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:05:27,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:05:27,273 INFO L87 Difference]: Start difference. First operand 288 states and 636 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:27,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:27,466 INFO L93 Difference]: Finished difference Result 330 states and 717 transitions. [2021-06-05 22:05:27,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:05:27,466 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:27,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:27,467 INFO L225 Difference]: With dead ends: 330 [2021-06-05 22:05:27,467 INFO L226 Difference]: Without dead ends: 330 [2021-06-05 22:05:27,467 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 248.7ms TimeCoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:05:27,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-06-05 22:05:27,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 289. [2021-06-05 22:05:27,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.2152777777777777) internal successors, (638), 288 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:27,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 638 transitions. [2021-06-05 22:05:27,469 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 638 transitions. Word has length 21 [2021-06-05 22:05:27,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:27,469 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 638 transitions. [2021-06-05 22:05:27,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:27,469 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 638 transitions. [2021-06-05 22:05:27,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:27,469 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:27,469 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:27,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4190,903 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:27,670 INFO L430 AbstractCegarLoop]: === Iteration 909 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:27,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:27,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1918272398, now seen corresponding path program 903 times [2021-06-05 22:05:27,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:27,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022652085] [2021-06-05 22:05:27,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:27,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:27,806 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:27,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:27,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022652085] [2021-06-05 22:05:27,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022652085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:27,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420683640] [2021-06-05 22:05:27,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 904 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 904 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:27,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:05:27,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:27,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:05:27,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:28,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:28,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:28,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:05:28,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:28,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:28,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 22:05:28,044 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:28,086 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-06-05 22:05:28,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:05:28,088 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:28,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:28,104 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 22:05:28,104 INFO L518 ElimStorePlain]: Eliminatee v_prenex_790 vanished before elimination [2021-06-05 22:05:28,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:05:28,105 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 22:05:28,135 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:28,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420683640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:28,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:28,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 22:05:28,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461132484] [2021-06-05 22:05:28,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:05:28,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:28,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:05:28,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:28,136 INFO L87 Difference]: Start difference. First operand 289 states and 638 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:28,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:28,614 INFO L93 Difference]: Finished difference Result 301 states and 659 transitions. [2021-06-05 22:05:28,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:05:28,615 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:28,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:28,615 INFO L225 Difference]: With dead ends: 301 [2021-06-05 22:05:28,615 INFO L226 Difference]: Without dead ends: 301 [2021-06-05 22:05:28,615 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 527.9ms TimeCoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:05:28,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-06-05 22:05:28,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 284. [2021-06-05 22:05:28,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.2190812720848054) internal successors, (628), 283 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:28,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 628 transitions. [2021-06-05 22:05:28,617 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 628 transitions. Word has length 21 [2021-06-05 22:05:28,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:28,617 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 628 transitions. [2021-06-05 22:05:28,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:28,617 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 628 transitions. [2021-06-05 22:05:28,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:28,618 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:28,618 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:28,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4194,904 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:28,818 INFO L430 AbstractCegarLoop]: === Iteration 910 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:28,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:28,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1897742802, now seen corresponding path program 904 times [2021-06-05 22:05:28,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:28,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504501342] [2021-06-05 22:05:28,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:28,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:28,915 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:28,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:28,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504501342] [2021-06-05 22:05:28,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504501342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:28,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227095829] [2021-06-05 22:05:28,916 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 905 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 905 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:28,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:05:28,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:28,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:05:28,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:29,094 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:29,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227095829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:29,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:29,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 22:05:29,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096295860] [2021-06-05 22:05:29,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:05:29,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:29,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:05:29,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:29,095 INFO L87 Difference]: Start difference. First operand 284 states and 628 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:29,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:29,341 INFO L93 Difference]: Finished difference Result 339 states and 733 transitions. [2021-06-05 22:05:29,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:05:29,341 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:29,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:29,342 INFO L225 Difference]: With dead ends: 339 [2021-06-05 22:05:29,342 INFO L226 Difference]: Without dead ends: 339 [2021-06-05 22:05:29,342 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 221.9ms TimeCoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:05:29,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-06-05 22:05:29,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 286. [2021-06-05 22:05:29,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.2175438596491226) internal successors, (632), 285 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:29,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 632 transitions. [2021-06-05 22:05:29,344 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 632 transitions. Word has length 21 [2021-06-05 22:05:29,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:29,344 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 632 transitions. [2021-06-05 22:05:29,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:29,344 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 632 transitions. [2021-06-05 22:05:29,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:29,344 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:29,344 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:29,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4201,905 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:29,545 INFO L430 AbstractCegarLoop]: === Iteration 911 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:29,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:29,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1964297730, now seen corresponding path program 905 times [2021-06-05 22:05:29,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:29,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166245764] [2021-06-05 22:05:29,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:29,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:29,648 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:29,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:29,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166245764] [2021-06-05 22:05:29,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166245764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:29,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702499996] [2021-06-05 22:05:29,649 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 906 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 906 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:29,676 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:05:29,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:29,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:05:29,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:29,839 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:29,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702499996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:29,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:29,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 22:05:29,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578505314] [2021-06-05 22:05:29,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:05:29,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:29,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:05:29,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:29,840 INFO L87 Difference]: Start difference. First operand 286 states and 632 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:30,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:30,388 INFO L93 Difference]: Finished difference Result 364 states and 785 transitions. [2021-06-05 22:05:30,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:05:30,388 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:30,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:30,388 INFO L225 Difference]: With dead ends: 364 [2021-06-05 22:05:30,388 INFO L226 Difference]: Without dead ends: 364 [2021-06-05 22:05:30,389 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 451.0ms TimeCoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:05:30,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-06-05 22:05:30,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 287. [2021-06-05 22:05:30,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 2.2167832167832167) internal successors, (634), 286 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:30,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 634 transitions. [2021-06-05 22:05:30,391 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 634 transitions. Word has length 21 [2021-06-05 22:05:30,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:30,391 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 634 transitions. [2021-06-05 22:05:30,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:30,391 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 634 transitions. [2021-06-05 22:05:30,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:30,391 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:30,391 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:30,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4205,906 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:30,592 INFO L430 AbstractCegarLoop]: === Iteration 912 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:30,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:30,592 INFO L82 PathProgramCache]: Analyzing trace with hash 719518674, now seen corresponding path program 906 times [2021-06-05 22:05:30,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:30,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527795766] [2021-06-05 22:05:30,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:30,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:30,694 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:30,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:30,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527795766] [2021-06-05 22:05:30,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527795766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:30,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957956953] [2021-06-05 22:05:30,694 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 907 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 907 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:30,721 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:05:30,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:30,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:05:30,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:30,901 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:30,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957956953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:30,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:30,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 22:05:30,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130570316] [2021-06-05 22:05:30,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:05:30,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:30,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:05:30,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:30,901 INFO L87 Difference]: Start difference. First operand 287 states and 634 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:31,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:31,547 INFO L93 Difference]: Finished difference Result 359 states and 774 transitions. [2021-06-05 22:05:31,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:05:31,547 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:31,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:31,548 INFO L225 Difference]: With dead ends: 359 [2021-06-05 22:05:31,548 INFO L226 Difference]: Without dead ends: 359 [2021-06-05 22:05:31,548 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 480.8ms TimeCoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:05:31,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-05 22:05:31,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 288. [2021-06-05 22:05:31,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 2.21602787456446) internal successors, (636), 287 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:31,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 636 transitions. [2021-06-05 22:05:31,550 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 636 transitions. Word has length 21 [2021-06-05 22:05:31,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:31,550 INFO L482 AbstractCegarLoop]: Abstraction has 288 states and 636 transitions. [2021-06-05 22:05:31,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:31,551 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 636 transitions. [2021-06-05 22:05:31,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:31,551 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:31,551 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:31,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4209,907 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:31,751 INFO L430 AbstractCegarLoop]: === Iteration 913 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:31,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:31,751 INFO L82 PathProgramCache]: Analyzing trace with hash 359602156, now seen corresponding path program 907 times [2021-06-05 22:05:31,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:31,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923701885] [2021-06-05 22:05:31,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:31,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:31,853 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:31,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:31,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923701885] [2021-06-05 22:05:31,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923701885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:31,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245698161] [2021-06-05 22:05:31,854 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 908 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 908 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:31,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:31,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 22:05:31,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:32,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:32,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:32,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 22:05:32,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:32,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:32,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 22:05:32,044 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:32,088 INFO L628 ElimStorePlain]: treesize reduction 74, result has 38.8 percent of original size [2021-06-05 22:05:32,088 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 22:05:32,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:32,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 22:05:32,091 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:32,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:32,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:32,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:05:32,110 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:05:32,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:32,126 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:05:32,126 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-06-05 22:05:32,171 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:32,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245698161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:32,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:32,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 22:05:32,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497918156] [2021-06-05 22:05:32,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:05:32,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:32,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:05:32,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:05:32,172 INFO L87 Difference]: Start difference. First operand 288 states and 636 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:32,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:32,861 INFO L93 Difference]: Finished difference Result 361 states and 777 transitions. [2021-06-05 22:05:32,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:05:32,861 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:32,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:32,862 INFO L225 Difference]: With dead ends: 361 [2021-06-05 22:05:32,862 INFO L226 Difference]: Without dead ends: 361 [2021-06-05 22:05:32,862 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 567.5ms TimeCoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:05:32,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-06-05 22:05:32,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 289. [2021-06-05 22:05:32,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.2152777777777777) internal successors, (638), 288 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:32,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 638 transitions. [2021-06-05 22:05:32,864 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 638 transitions. Word has length 21 [2021-06-05 22:05:32,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:32,864 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 638 transitions. [2021-06-05 22:05:32,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:32,864 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 638 transitions. [2021-06-05 22:05:32,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:32,865 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:32,865 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:33,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4213,908 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:33,065 INFO L430 AbstractCegarLoop]: === Iteration 914 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:33,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:33,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1069649926, now seen corresponding path program 908 times [2021-06-05 22:05:33,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:33,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014301154] [2021-06-05 22:05:33,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:33,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:33,203 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:33,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:33,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014301154] [2021-06-05 22:05:33,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014301154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:33,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658581116] [2021-06-05 22:05:33,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 909 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 909 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:33,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:05:33,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:33,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 22:05:33,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:33,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:33,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:33,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 22:05:33,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:33,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:33,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 22:05:33,414 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:33,461 INFO L628 ElimStorePlain]: treesize reduction 74, result has 41.7 percent of original size [2021-06-05 22:05:33,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:33,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 22:05:33,465 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:05:33,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:33,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 22:05:33,484 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:33,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:33,499 INFO L518 ElimStorePlain]: Eliminatee v_prenex_798 vanished before elimination [2021-06-05 22:05:33,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:05:33,500 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-06-05 22:05:33,550 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:33,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658581116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:33,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:33,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 22:05:33,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943977505] [2021-06-05 22:05:33,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:05:33,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:33,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:05:33,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:05:33,550 INFO L87 Difference]: Start difference. First operand 289 states and 638 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:33,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:33,986 INFO L93 Difference]: Finished difference Result 310 states and 677 transitions. [2021-06-05 22:05:33,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:05:33,987 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:33,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:33,987 INFO L225 Difference]: With dead ends: 310 [2021-06-05 22:05:33,987 INFO L226 Difference]: Without dead ends: 310 [2021-06-05 22:05:33,987 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 432.7ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:05:33,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-06-05 22:05:33,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 285. [2021-06-05 22:05:33,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.2183098591549295) internal successors, (630), 284 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:33,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 630 transitions. [2021-06-05 22:05:33,989 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 630 transitions. Word has length 21 [2021-06-05 22:05:33,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:33,989 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 630 transitions. [2021-06-05 22:05:33,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:33,989 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 630 transitions. [2021-06-05 22:05:33,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:33,990 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:33,990 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:34,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4217,909 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:34,190 INFO L430 AbstractCegarLoop]: === Iteration 915 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:34,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:34,190 INFO L82 PathProgramCache]: Analyzing trace with hash 274354826, now seen corresponding path program 909 times [2021-06-05 22:05:34,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:34,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9079082] [2021-06-05 22:05:34,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:34,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:34,290 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:34,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:34,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9079082] [2021-06-05 22:05:34,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9079082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:34,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500806924] [2021-06-05 22:05:34,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 910 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 910 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:34,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:05:34,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:34,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:05:34,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:34,477 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:34,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500806924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:34,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:34,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 22:05:34,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121974312] [2021-06-05 22:05:34,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:05:34,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:34,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:05:34,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:34,478 INFO L87 Difference]: Start difference. First operand 285 states and 630 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:34,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:34,941 INFO L93 Difference]: Finished difference Result 356 states and 768 transitions. [2021-06-05 22:05:34,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:05:34,942 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:34,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:34,942 INFO L225 Difference]: With dead ends: 356 [2021-06-05 22:05:34,942 INFO L226 Difference]: Without dead ends: 356 [2021-06-05 22:05:34,942 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 372.0ms TimeCoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:05:34,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-06-05 22:05:34,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 288. [2021-06-05 22:05:34,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 2.21602787456446) internal successors, (636), 287 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:34,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 636 transitions. [2021-06-05 22:05:34,944 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 636 transitions. Word has length 21 [2021-06-05 22:05:34,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:34,945 INFO L482 AbstractCegarLoop]: Abstraction has 288 states and 636 transitions. [2021-06-05 22:05:34,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:34,945 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 636 transitions. [2021-06-05 22:05:34,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:34,945 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:34,945 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:35,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4223,910 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:35,145 INFO L430 AbstractCegarLoop]: === Iteration 916 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:35,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:35,146 INFO L82 PathProgramCache]: Analyzing trace with hash -970424230, now seen corresponding path program 910 times [2021-06-05 22:05:35,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:35,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554397099] [2021-06-05 22:05:35,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:35,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:35,247 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:35,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:35,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554397099] [2021-06-05 22:05:35,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554397099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:35,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566944444] [2021-06-05 22:05:35,247 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 911 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 911 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:35,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:05:35,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:35,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:05:35,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:35,457 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:35,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566944444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:35,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:35,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 22:05:35,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571141297] [2021-06-05 22:05:35,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:05:35,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:35,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:05:35,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:05:35,458 INFO L87 Difference]: Start difference. First operand 288 states and 636 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:36,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:36,350 INFO L93 Difference]: Finished difference Result 379 states and 814 transitions. [2021-06-05 22:05:36,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:05:36,350 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:36,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:36,351 INFO L225 Difference]: With dead ends: 379 [2021-06-05 22:05:36,351 INFO L226 Difference]: Without dead ends: 379 [2021-06-05 22:05:36,351 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 687.5ms TimeCoverageRelationStatistics Valid=181, Invalid=1301, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:05:36,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-06-05 22:05:36,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 289. [2021-06-05 22:05:36,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.2152777777777777) internal successors, (638), 288 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:36,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 638 transitions. [2021-06-05 22:05:36,353 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 638 transitions. Word has length 21 [2021-06-05 22:05:36,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:36,353 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 638 transitions. [2021-06-05 22:05:36,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:36,353 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 638 transitions. [2021-06-05 22:05:36,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:36,354 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:36,354 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:36,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4227,911 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:36,554 INFO L430 AbstractCegarLoop]: === Iteration 917 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:36,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:36,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1330340748, now seen corresponding path program 911 times [2021-06-05 22:05:36,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:36,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905313085] [2021-06-05 22:05:36,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:36,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:36,662 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:36,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:36,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905313085] [2021-06-05 22:05:36,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905313085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:36,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914668167] [2021-06-05 22:05:36,662 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 912 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 912 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:36,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:05:36,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:36,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:05:36,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:36,891 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:36,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914668167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:36,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:36,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 22:05:36,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508955805] [2021-06-05 22:05:36,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:05:36,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:36,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:05:36,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:36,892 INFO L87 Difference]: Start difference. First operand 289 states and 638 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:37,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:37,936 INFO L93 Difference]: Finished difference Result 389 states and 835 transitions. [2021-06-05 22:05:37,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 22:05:37,936 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:37,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:37,937 INFO L225 Difference]: With dead ends: 389 [2021-06-05 22:05:37,937 INFO L226 Difference]: Without dead ends: 389 [2021-06-05 22:05:37,937 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 840.7ms TimeCoverageRelationStatistics Valid=197, Invalid=1609, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:05:37,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-06-05 22:05:37,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 290. [2021-06-05 22:05:37,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.2145328719723185) internal successors, (640), 289 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:37,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 640 transitions. [2021-06-05 22:05:37,939 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 640 transitions. Word has length 21 [2021-06-05 22:05:37,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:37,939 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 640 transitions. [2021-06-05 22:05:37,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:37,939 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 640 transitions. [2021-06-05 22:05:37,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:37,940 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:37,940 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:38,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 912 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4231 [2021-06-05 22:05:38,140 INFO L430 AbstractCegarLoop]: === Iteration 918 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:38,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:38,140 INFO L82 PathProgramCache]: Analyzing trace with hash -620292978, now seen corresponding path program 912 times [2021-06-05 22:05:38,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:38,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249099910] [2021-06-05 22:05:38,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:38,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:38,313 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:38,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:38,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249099910] [2021-06-05 22:05:38,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249099910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:38,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907611171] [2021-06-05 22:05:38,313 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 913 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 913 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:38,340 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:05:38,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:38,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:05:38,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:38,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:38,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:38,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:05:38,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:38,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:38,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:05:38,494 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:38,539 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-06-05 22:05:38,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:05:38,542 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:38,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:38,556 INFO L518 ElimStorePlain]: Eliminatee v_prenex_803 vanished before elimination [2021-06-05 22:05:38,556 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 22:05:38,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:05:38,557 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 22:05:38,608 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:38,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907611171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:38,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:38,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 22:05:38,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46939106] [2021-06-05 22:05:38,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:05:38,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:38,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:05:38,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:05:38,609 INFO L87 Difference]: Start difference. First operand 290 states and 640 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:39,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:39,350 INFO L93 Difference]: Finished difference Result 319 states and 695 transitions. [2021-06-05 22:05:39,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:05:39,356 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:39,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:39,356 INFO L225 Difference]: With dead ends: 319 [2021-06-05 22:05:39,356 INFO L226 Difference]: Without dead ends: 319 [2021-06-05 22:05:39,356 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 691.4ms TimeCoverageRelationStatistics Valid=121, Invalid=1001, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:05:39,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-06-05 22:05:39,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 287. [2021-06-05 22:05:39,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 2.2167832167832167) internal successors, (634), 286 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:39,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 634 transitions. [2021-06-05 22:05:39,358 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 634 transitions. Word has length 21 [2021-06-05 22:05:39,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:39,359 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 634 transitions. [2021-06-05 22:05:39,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:39,359 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 634 transitions. [2021-06-05 22:05:39,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:39,359 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:39,359 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:39,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 913 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4241 [2021-06-05 22:05:39,575 INFO L430 AbstractCegarLoop]: === Iteration 919 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:39,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:39,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1856222510, now seen corresponding path program 913 times [2021-06-05 22:05:39,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:39,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040148206] [2021-06-05 22:05:39,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:39,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:39,677 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:39,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:39,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040148206] [2021-06-05 22:05:39,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040148206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:39,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624400190] [2021-06-05 22:05:39,677 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 914 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 914 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:39,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:39,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:05:39,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:39,888 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:39,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624400190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:39,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:39,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 22:05:39,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722874173] [2021-06-05 22:05:39,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:05:39,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:39,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:05:39,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:39,889 INFO L87 Difference]: Start difference. First operand 287 states and 634 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:40,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:40,480 INFO L93 Difference]: Finished difference Result 341 states and 737 transitions. [2021-06-05 22:05:40,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:05:40,481 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:40,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:40,481 INFO L225 Difference]: With dead ends: 341 [2021-06-05 22:05:40,481 INFO L226 Difference]: Without dead ends: 341 [2021-06-05 22:05:40,481 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 472.2ms TimeCoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:05:40,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-06-05 22:05:40,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 290. [2021-06-05 22:05:40,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.2145328719723185) internal successors, (640), 289 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:40,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 640 transitions. [2021-06-05 22:05:40,483 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 640 transitions. Word has length 21 [2021-06-05 22:05:40,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:40,484 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 640 transitions. [2021-06-05 22:05:40,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:40,484 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 640 transitions. [2021-06-05 22:05:40,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:40,484 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:40,484 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:40,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4248,914 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:40,693 INFO L430 AbstractCegarLoop]: === Iteration 920 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:40,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:40,693 INFO L82 PathProgramCache]: Analyzing trace with hash 2078828268, now seen corresponding path program 914 times [2021-06-05 22:05:40,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:40,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259123396] [2021-06-05 22:05:40,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:40,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:40,799 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:40,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:40,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259123396] [2021-06-05 22:05:40,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259123396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:40,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312194769] [2021-06-05 22:05:40,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 915 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 915 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:40,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:05:40,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:40,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 22:05:40,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:40,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:40,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:40,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 22:05:40,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:40,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:40,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 22:05:40,947 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:40,992 INFO L628 ElimStorePlain]: treesize reduction 74, result has 39.8 percent of original size [2021-06-05 22:05:40,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:40,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 22:05:40,996 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:05:41,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:41,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:05:41,015 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:41,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:41,030 INFO L518 ElimStorePlain]: Eliminatee v_prenex_805 vanished before elimination [2021-06-05 22:05:41,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:05:41,031 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-06-05 22:05:41,076 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:41,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312194769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:41,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:41,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 22:05:41,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246974353] [2021-06-05 22:05:41,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:05:41,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:41,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:05:41,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:05:41,077 INFO L87 Difference]: Start difference. First operand 290 states and 640 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:42,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:42,013 INFO L93 Difference]: Finished difference Result 377 states and 808 transitions. [2021-06-05 22:05:42,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 22:05:42,013 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:42,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:42,014 INFO L225 Difference]: With dead ends: 377 [2021-06-05 22:05:42,014 INFO L226 Difference]: Without dead ends: 377 [2021-06-05 22:05:42,014 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 690.1ms TimeCoverageRelationStatistics Valid=200, Invalid=1692, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:05:42,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-06-05 22:05:42,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 291. [2021-06-05 22:05:42,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.213793103448276) internal successors, (642), 290 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:42,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 642 transitions. [2021-06-05 22:05:42,016 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 642 transitions. Word has length 21 [2021-06-05 22:05:42,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:42,016 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 642 transitions. [2021-06-05 22:05:42,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:42,016 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 642 transitions. [2021-06-05 22:05:42,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:42,017 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:42,017 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:42,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4252,915 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:42,217 INFO L430 AbstractCegarLoop]: === Iteration 921 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:42,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:42,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1506091258, now seen corresponding path program 915 times [2021-06-05 22:05:42,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:42,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139472813] [2021-06-05 22:05:42,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:42,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:42,330 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:42,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:42,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139472813] [2021-06-05 22:05:42,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139472813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:42,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372296985] [2021-06-05 22:05:42,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 916 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 916 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:42,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:05:42,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:42,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:05:42,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:42,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:42,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:42,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:05:42,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:42,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:42,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 22:05:42,496 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:42,532 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-06-05 22:05:42,533 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 22:05:42,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:05:42,535 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:42,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:42,549 INFO L518 ElimStorePlain]: Eliminatee v_prenex_808 vanished before elimination [2021-06-05 22:05:42,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:05:42,549 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-06-05 22:05:42,577 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:42,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372296985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:42,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:42,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 22:05:42,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393645094] [2021-06-05 22:05:42,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:05:42,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:42,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:05:42,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:42,577 INFO L87 Difference]: Start difference. First operand 291 states and 642 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:43,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:43,243 INFO L93 Difference]: Finished difference Result 328 states and 713 transitions. [2021-06-05 22:05:43,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:05:43,243 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:43,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:43,244 INFO L225 Difference]: With dead ends: 328 [2021-06-05 22:05:43,244 INFO L226 Difference]: Without dead ends: 328 [2021-06-05 22:05:43,244 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 538.8ms TimeCoverageRelationStatistics Valid=128, Invalid=1062, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:05:43,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-06-05 22:05:43,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 289. [2021-06-05 22:05:43,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.2152777777777777) internal successors, (638), 288 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:43,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 638 transitions. [2021-06-05 22:05:43,246 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 638 transitions. Word has length 21 [2021-06-05 22:05:43,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:43,246 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 638 transitions. [2021-06-05 22:05:43,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:43,246 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 638 transitions. [2021-06-05 22:05:43,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:43,246 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:43,246 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:43,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4256,916 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:43,447 INFO L430 AbstractCegarLoop]: === Iteration 922 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:43,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:43,447 INFO L82 PathProgramCache]: Analyzing trace with hash -678024822, now seen corresponding path program 916 times [2021-06-05 22:05:43,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:43,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339516983] [2021-06-05 22:05:43,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:43,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:43,561 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:43,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:43,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339516983] [2021-06-05 22:05:43,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339516983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:43,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682464298] [2021-06-05 22:05:43,562 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 917 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 917 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:43,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:05:43,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:43,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:05:43,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:43,726 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:43,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682464298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:43,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:43,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 22:05:43,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181009020] [2021-06-05 22:05:43,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:05:43,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:43,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:05:43,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:43,726 INFO L87 Difference]: Start difference. First operand 289 states and 638 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:44,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:44,209 INFO L93 Difference]: Finished difference Result 338 states and 725 transitions. [2021-06-05 22:05:44,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:05:44,209 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:44,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:44,209 INFO L225 Difference]: With dead ends: 338 [2021-06-05 22:05:44,210 INFO L226 Difference]: Without dead ends: 338 [2021-06-05 22:05:44,210 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 420.9ms TimeCoverageRelationStatistics Valid=115, Invalid=1007, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:05:44,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-06-05 22:05:44,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 291. [2021-06-05 22:05:44,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.217241379310345) internal successors, (643), 290 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:44,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 643 transitions. [2021-06-05 22:05:44,212 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 643 transitions. Word has length 21 [2021-06-05 22:05:44,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:44,212 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 643 transitions. [2021-06-05 22:05:44,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:44,212 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 643 transitions. [2021-06-05 22:05:44,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:44,212 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:44,212 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:44,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4263,917 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:44,413 INFO L430 AbstractCegarLoop]: === Iteration 923 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:44,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:44,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1332160888, now seen corresponding path program 917 times [2021-06-05 22:05:44,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:44,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042245496] [2021-06-05 22:05:44,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:44,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:44,516 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:44,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:44,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042245496] [2021-06-05 22:05:44,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042245496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:44,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267227489] [2021-06-05 22:05:44,516 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 918 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 918 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:44,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:05:44,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:44,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:05:44,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:44,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:44,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:44,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 22:05:44,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:44,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:44,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:44,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:05:44,667 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:44,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:44,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:44,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:05:44,670 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:44,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:44,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:05:44,673 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:44,709 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-06-05 22:05:44,709 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 22:05:44,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:05:44,709 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-06-05 22:05:44,737 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:44,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267227489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:44,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:44,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 22:05:44,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909949609] [2021-06-05 22:05:44,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:05:44,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:44,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:05:44,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:44,738 INFO L87 Difference]: Start difference. First operand 291 states and 643 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:45,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:45,222 INFO L93 Difference]: Finished difference Result 399 states and 846 transitions. [2021-06-05 22:05:45,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:05:45,222 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:45,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:45,222 INFO L225 Difference]: With dead ends: 399 [2021-06-05 22:05:45,222 INFO L226 Difference]: Without dead ends: 399 [2021-06-05 22:05:45,223 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 399.1ms TimeCoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:05:45,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-06-05 22:05:45,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 292. [2021-06-05 22:05:45,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.2268041237113403) internal successors, (648), 291 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:45,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 648 transitions. [2021-06-05 22:05:45,225 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 648 transitions. Word has length 21 [2021-06-05 22:05:45,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:45,225 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 648 transitions. [2021-06-05 22:05:45,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:45,225 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 648 transitions. [2021-06-05 22:05:45,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:45,225 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:45,225 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:45,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 918 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4273 [2021-06-05 22:05:45,426 INFO L430 AbstractCegarLoop]: === Iteration 924 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:45,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:45,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1550960076, now seen corresponding path program 918 times [2021-06-05 22:05:45,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:45,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146268524] [2021-06-05 22:05:45,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:45,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:45,540 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:45,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:45,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146268524] [2021-06-05 22:05:45,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146268524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:45,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31342273] [2021-06-05 22:05:45,540 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 919 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 919 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:45,568 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 22:05:45,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:45,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 22:05:45,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:45,740 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:45,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2021-06-05 22:05:45,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:45,756 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-05 22:05:45,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-06-05 22:05:45,757 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:45,770 INFO L628 ElimStorePlain]: treesize reduction 2, result has 87.5 percent of original size [2021-06-05 22:05:45,770 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 22:05:45,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:05:45,771 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:51, output treesize:14 [2021-06-05 22:05:45,800 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:45,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31342273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:45,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:45,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 22:05:45,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916981383] [2021-06-05 22:05:45,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:05:45,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:45,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:05:45,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:05:45,801 INFO L87 Difference]: Start difference. First operand 292 states and 648 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:46,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:46,498 INFO L93 Difference]: Finished difference Result 387 states and 825 transitions. [2021-06-05 22:05:46,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:05:46,499 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:46,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:46,499 INFO L225 Difference]: With dead ends: 387 [2021-06-05 22:05:46,499 INFO L226 Difference]: Without dead ends: 383 [2021-06-05 22:05:46,499 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 642.5ms TimeCoverageRelationStatistics Valid=233, Invalid=1489, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:05:46,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-06-05 22:05:46,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 320. [2021-06-05 22:05:46,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.2445141065830723) internal successors, (716), 319 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:46,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 716 transitions. [2021-06-05 22:05:46,502 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 716 transitions. Word has length 21 [2021-06-05 22:05:46,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:46,502 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 716 transitions. [2021-06-05 22:05:46,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:46,502 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 716 transitions. [2021-06-05 22:05:46,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:46,502 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:46,502 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:46,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 919 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4283 [2021-06-05 22:05:46,703 INFO L430 AbstractCegarLoop]: === Iteration 925 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:46,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:46,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1464078842, now seen corresponding path program 919 times [2021-06-05 22:05:46,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:46,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442140969] [2021-06-05 22:05:46,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:46,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:46,810 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:46,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:46,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442140969] [2021-06-05 22:05:46,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442140969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:46,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533963112] [2021-06-05 22:05:46,811 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 920 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 920 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:46,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:46,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:05:46,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:46,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:46,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:46,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:05:46,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:46,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:46,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:05:46,960 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:46,974 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-06-05 22:05:46,974 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 22:05:46,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:05:46,975 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-06-05 22:05:46,981 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:46,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533963112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:46,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:46,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 22:05:46,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813450004] [2021-06-05 22:05:46,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:05:46,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:46,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:05:46,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:46,981 INFO L87 Difference]: Start difference. First operand 320 states and 716 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:47,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:47,449 INFO L93 Difference]: Finished difference Result 378 states and 827 transitions. [2021-06-05 22:05:47,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:05:47,450 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:47,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:47,450 INFO L225 Difference]: With dead ends: 378 [2021-06-05 22:05:47,450 INFO L226 Difference]: Without dead ends: 378 [2021-06-05 22:05:47,450 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 382.6ms TimeCoverageRelationStatistics Valid=115, Invalid=1007, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:05:47,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-06-05 22:05:47,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 318. [2021-06-05 22:05:47,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.2365930599369084) internal successors, (709), 317 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:47,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 709 transitions. [2021-06-05 22:05:47,453 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 709 transitions. Word has length 21 [2021-06-05 22:05:47,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:47,453 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 709 transitions. [2021-06-05 22:05:47,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:47,453 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 709 transitions. [2021-06-05 22:05:47,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:47,453 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:47,453 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:47,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 920 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4287 [2021-06-05 22:05:47,654 INFO L430 AbstractCegarLoop]: === Iteration 926 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:47,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:47,654 INFO L82 PathProgramCache]: Analyzing trace with hash 941957830, now seen corresponding path program 920 times [2021-06-05 22:05:47,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:47,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650298613] [2021-06-05 22:05:47,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:47,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:47,758 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:47,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:47,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650298613] [2021-06-05 22:05:47,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650298613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:47,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485044568] [2021-06-05 22:05:47,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 921 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 921 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:47,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:05:47,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:47,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 22:05:47,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:47,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:47,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:47,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 22:05:47,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:47,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:47,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 22:05:47,962 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:47,980 INFO L628 ElimStorePlain]: treesize reduction 38, result has 28.3 percent of original size [2021-06-05 22:05:47,980 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 22:05:47,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:05:47,981 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 22:05:48,000 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:48,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485044568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:48,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:48,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 22:05:48,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942642271] [2021-06-05 22:05:48,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:05:48,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:48,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:05:48,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:05:48,001 INFO L87 Difference]: Start difference. First operand 318 states and 709 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:48,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:48,214 INFO L93 Difference]: Finished difference Result 345 states and 761 transitions. [2021-06-05 22:05:48,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:05:48,215 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:48,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:48,215 INFO L225 Difference]: With dead ends: 345 [2021-06-05 22:05:48,215 INFO L226 Difference]: Without dead ends: 345 [2021-06-05 22:05:48,215 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 232.4ms TimeCoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:05:48,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-06-05 22:05:48,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 318. [2021-06-05 22:05:48,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.2365930599369084) internal successors, (709), 317 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:48,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 709 transitions. [2021-06-05 22:05:48,218 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 709 transitions. Word has length 21 [2021-06-05 22:05:48,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:48,218 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 709 transitions. [2021-06-05 22:05:48,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:48,218 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 709 transitions. [2021-06-05 22:05:48,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:48,218 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:48,218 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:48,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4291,921 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:48,419 INFO L430 AbstractCegarLoop]: === Iteration 927 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:48,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:48,419 INFO L82 PathProgramCache]: Analyzing trace with hash -231654198, now seen corresponding path program 921 times [2021-06-05 22:05:48,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:48,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042167991] [2021-06-05 22:05:48,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:48,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:48,547 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:48,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:48,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042167991] [2021-06-05 22:05:48,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042167991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:48,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113438866] [2021-06-05 22:05:48,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 922 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 922 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:48,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:05:48,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:48,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 22:05:48,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:48,790 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:48,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113438866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:48,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:48,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 22:05:48,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383838676] [2021-06-05 22:05:48,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:05:48,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:48,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:05:48,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:05:48,790 INFO L87 Difference]: Start difference. First operand 318 states and 709 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:49,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:49,119 INFO L93 Difference]: Finished difference Result 337 states and 738 transitions. [2021-06-05 22:05:49,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:05:49,119 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:49,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:49,119 INFO L225 Difference]: With dead ends: 337 [2021-06-05 22:05:49,119 INFO L226 Difference]: Without dead ends: 325 [2021-06-05 22:05:49,119 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 385.9ms TimeCoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:05:49,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-06-05 22:05:49,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 317. [2021-06-05 22:05:49,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.2341772151898733) internal successors, (706), 316 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:49,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 706 transitions. [2021-06-05 22:05:49,122 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 706 transitions. Word has length 21 [2021-06-05 22:05:49,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:49,122 INFO L482 AbstractCegarLoop]: Abstraction has 317 states and 706 transitions. [2021-06-05 22:05:49,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:49,122 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 706 transitions. [2021-06-05 22:05:49,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:49,122 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:49,122 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:49,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 922 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4293 [2021-06-05 22:05:49,323 INFO L430 AbstractCegarLoop]: === Iteration 928 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:49,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:49,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1289806698, now seen corresponding path program 922 times [2021-06-05 22:05:49,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:49,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546327346] [2021-06-05 22:05:49,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:49,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:49,426 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:49,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:49,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546327346] [2021-06-05 22:05:49,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546327346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:49,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339485564] [2021-06-05 22:05:49,426 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 923 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 923 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:49,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:05:49,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:49,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:05:49,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:49,639 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:49,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339485564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:49,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:49,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 22:05:49,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296704978] [2021-06-05 22:05:49,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:05:49,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:49,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:05:49,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:05:49,640 INFO L87 Difference]: Start difference. First operand 317 states and 706 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:50,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:50,113 INFO L93 Difference]: Finished difference Result 380 states and 831 transitions. [2021-06-05 22:05:50,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:05:50,113 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:50,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:50,113 INFO L225 Difference]: With dead ends: 380 [2021-06-05 22:05:50,113 INFO L226 Difference]: Without dead ends: 380 [2021-06-05 22:05:50,114 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 475.1ms TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:05:50,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-06-05 22:05:50,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 318. [2021-06-05 22:05:50,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.2334384858044163) internal successors, (708), 317 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:50,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 708 transitions. [2021-06-05 22:05:50,116 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 708 transitions. Word has length 21 [2021-06-05 22:05:50,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:50,116 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 708 transitions. [2021-06-05 22:05:50,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:50,116 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 708 transitions. [2021-06-05 22:05:50,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:50,116 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:50,116 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:50,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4298,923 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:50,317 INFO L430 AbstractCegarLoop]: === Iteration 929 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:50,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:50,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1223251770, now seen corresponding path program 923 times [2021-06-05 22:05:50,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:50,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645562713] [2021-06-05 22:05:50,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:50,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:50,428 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:50,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:50,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645562713] [2021-06-05 22:05:50,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645562713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:50,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828560965] [2021-06-05 22:05:50,428 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 924 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 924 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:50,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:05:50,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:50,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 22:05:50,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:50,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:50,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:50,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 22:05:50,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:50,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:50,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 22:05:50,654 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:50,670 INFO L628 ElimStorePlain]: treesize reduction 36, result has 29.4 percent of original size [2021-06-05 22:05:50,670 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 22:05:50,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:05:50,671 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-06-05 22:05:50,689 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:50,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828560965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:50,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:50,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 22:05:50,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618874508] [2021-06-05 22:05:50,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:05:50,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:50,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:05:50,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:05:50,690 INFO L87 Difference]: Start difference. First operand 318 states and 708 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:51,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:51,248 INFO L93 Difference]: Finished difference Result 394 states and 858 transitions. [2021-06-05 22:05:51,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:05:51,249 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:51,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:51,249 INFO L225 Difference]: With dead ends: 394 [2021-06-05 22:05:51,249 INFO L226 Difference]: Without dead ends: 394 [2021-06-05 22:05:51,249 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 504.2ms TimeCoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:05:51,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-06-05 22:05:51,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 319. [2021-06-05 22:05:51,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.2327044025157234) internal successors, (710), 318 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:51,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 710 transitions. [2021-06-05 22:05:51,252 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 710 transitions. Word has length 21 [2021-06-05 22:05:51,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:51,252 INFO L482 AbstractCegarLoop]: Abstraction has 319 states and 710 transitions. [2021-06-05 22:05:51,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:51,252 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 710 transitions. [2021-06-05 22:05:51,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:51,252 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:51,252 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:51,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4302,924 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:51,452 INFO L430 AbstractCegarLoop]: === Iteration 930 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:51,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:51,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1826936470, now seen corresponding path program 924 times [2021-06-05 22:05:51,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:51,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429491077] [2021-06-05 22:05:51,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:51,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:51,559 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:51,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:51,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429491077] [2021-06-05 22:05:51,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429491077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:51,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317291163] [2021-06-05 22:05:51,560 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 925 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 925 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:51,586 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:05:51,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:51,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:05:51,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:51,822 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:51,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317291163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:51,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:51,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 22:05:51,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680648554] [2021-06-05 22:05:51,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:05:51,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:51,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:05:51,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:05:51,822 INFO L87 Difference]: Start difference. First operand 319 states and 710 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:52,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:52,415 INFO L93 Difference]: Finished difference Result 393 states and 856 transitions. [2021-06-05 22:05:52,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:05:52,415 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:52,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:52,415 INFO L225 Difference]: With dead ends: 393 [2021-06-05 22:05:52,415 INFO L226 Difference]: Without dead ends: 393 [2021-06-05 22:05:52,416 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 566.7ms TimeCoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:05:52,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-06-05 22:05:52,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 320. [2021-06-05 22:05:52,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.231974921630094) internal successors, (712), 319 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:52,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 712 transitions. [2021-06-05 22:05:52,418 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 712 transitions. Word has length 21 [2021-06-05 22:05:52,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:52,418 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 712 transitions. [2021-06-05 22:05:52,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:52,418 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 712 transitions. [2021-06-05 22:05:52,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:52,419 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:52,419 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:52,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4304,925 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:52,619 INFO L430 AbstractCegarLoop]: === Iteration 931 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:52,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:52,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1467019952, now seen corresponding path program 925 times [2021-06-05 22:05:52,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:52,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540908315] [2021-06-05 22:05:52,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:52,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:52,728 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:52,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:52,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540908315] [2021-06-05 22:05:52,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540908315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:52,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530913059] [2021-06-05 22:05:52,729 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 926 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 926 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:52,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:52,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 22:05:52,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:52,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:52,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:52,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 22:05:52,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:52,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:52,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 22:05:52,956 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:53,000 INFO L628 ElimStorePlain]: treesize reduction 80, result has 35.0 percent of original size [2021-06-05 22:05:53,000 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 22:05:53,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 22:05:53,003 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:53,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:53,019 INFO L518 ElimStorePlain]: Eliminatee v_prenex_816 vanished before elimination [2021-06-05 22:05:53,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:05:53,020 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-06-05 22:05:53,067 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:53,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530913059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:53,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:53,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 22:05:53,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069332287] [2021-06-05 22:05:53,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:05:53,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:53,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:05:53,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:05:53,068 INFO L87 Difference]: Start difference. First operand 320 states and 712 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:53,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:53,687 INFO L93 Difference]: Finished difference Result 387 states and 844 transitions. [2021-06-05 22:05:53,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:05:53,688 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:53,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:53,688 INFO L225 Difference]: With dead ends: 387 [2021-06-05 22:05:53,688 INFO L226 Difference]: Without dead ends: 387 [2021-06-05 22:05:53,689 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 605.8ms TimeCoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:05:53,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-06-05 22:05:53,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 321. [2021-06-05 22:05:53,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 2.23125) internal successors, (714), 320 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:53,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 714 transitions. [2021-06-05 22:05:53,691 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 714 transitions. Word has length 21 [2021-06-05 22:05:53,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:53,691 INFO L482 AbstractCegarLoop]: Abstraction has 321 states and 714 transitions. [2021-06-05 22:05:53,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:53,691 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 714 transitions. [2021-06-05 22:05:53,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:53,692 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:53,692 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:53,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 926 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4308 [2021-06-05 22:05:53,892 INFO L430 AbstractCegarLoop]: === Iteration 932 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:53,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:53,892 INFO L82 PathProgramCache]: Analyzing trace with hash -2117899574, now seen corresponding path program 926 times [2021-06-05 22:05:53,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:53,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099924067] [2021-06-05 22:05:53,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:53,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:54,029 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:54,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:54,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099924067] [2021-06-05 22:05:54,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099924067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:54,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532415127] [2021-06-05 22:05:54,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 927 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 927 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:54,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:05:54,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:54,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 22:05:54,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:54,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:54,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:54,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 22:05:54,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:54,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:54,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 22:05:54,283 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:54,330 INFO L628 ElimStorePlain]: treesize reduction 76, result has 40.2 percent of original size [2021-06-05 22:05:54,330 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-06-05 22:05:54,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:54,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 22:05:54,333 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:54,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:54,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:05:54,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 22:05:54,352 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 22:05:54,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:54,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:05:54,368 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-06-05 22:05:54,418 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:54,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532415127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:54,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:54,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 22:05:54,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794420531] [2021-06-05 22:05:54,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:05:54,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:54,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:05:54,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:05:54,419 INFO L87 Difference]: Start difference. First operand 321 states and 714 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:54,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:54,717 INFO L93 Difference]: Finished difference Result 338 states and 746 transitions. [2021-06-05 22:05:54,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:05:54,717 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:54,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:54,718 INFO L225 Difference]: With dead ends: 338 [2021-06-05 22:05:54,718 INFO L226 Difference]: Without dead ends: 338 [2021-06-05 22:05:54,718 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 355.2ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:05:54,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-06-05 22:05:54,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 315. [2021-06-05 22:05:54,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 2.2356687898089174) internal successors, (702), 314 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:54,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 702 transitions. [2021-06-05 22:05:54,720 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 702 transitions. Word has length 21 [2021-06-05 22:05:54,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:54,720 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 702 transitions. [2021-06-05 22:05:54,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:54,721 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 702 transitions. [2021-06-05 22:05:54,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:54,721 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:54,721 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:54,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4312,927 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:54,921 INFO L430 AbstractCegarLoop]: === Iteration 933 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:54,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:54,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1619045270, now seen corresponding path program 927 times [2021-06-05 22:05:54,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:54,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402692177] [2021-06-05 22:05:54,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:54,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:55,019 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:55,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:55,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402692177] [2021-06-05 22:05:55,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402692177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:55,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264214489] [2021-06-05 22:05:55,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 928 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 928 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:55,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:05:55,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:55,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:05:55,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:55,212 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:55,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264214489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:55,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:55,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 22:05:55,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220064131] [2021-06-05 22:05:55,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:05:55,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:55,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:05:55,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:05:55,213 INFO L87 Difference]: Start difference. First operand 315 states and 702 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:55,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:55,521 INFO L93 Difference]: Finished difference Result 378 states and 827 transitions. [2021-06-05 22:05:55,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:05:55,521 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:55,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:55,522 INFO L225 Difference]: With dead ends: 378 [2021-06-05 22:05:55,522 INFO L226 Difference]: Without dead ends: 378 [2021-06-05 22:05:55,522 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 211.6ms TimeCoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:05:55,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-06-05 22:05:55,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 316. [2021-06-05 22:05:55,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.234920634920635) internal successors, (704), 315 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:55,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 704 transitions. [2021-06-05 22:05:55,524 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 704 transitions. Word has length 21 [2021-06-05 22:05:55,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:55,524 INFO L482 AbstractCegarLoop]: Abstraction has 316 states and 704 transitions. [2021-06-05 22:05:55,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:55,525 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 704 transitions. [2021-06-05 22:05:55,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:55,525 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:55,525 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:55,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 928 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4318 [2021-06-05 22:05:55,725 INFO L430 AbstractCegarLoop]: === Iteration 934 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:55,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:55,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1685600198, now seen corresponding path program 928 times [2021-06-05 22:05:55,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:55,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878110736] [2021-06-05 22:05:55,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:55,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:55,824 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:55,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:55,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878110736] [2021-06-05 22:05:55,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878110736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:55,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223037936] [2021-06-05 22:05:55,825 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 929 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 929 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:55,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:05:55,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:55,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:05:55,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:56,038 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:56,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223037936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:56,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:56,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 22:05:56,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18726256] [2021-06-05 22:05:56,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:05:56,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:56,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:05:56,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:05:56,039 INFO L87 Difference]: Start difference. First operand 316 states and 704 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:56,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:56,580 INFO L93 Difference]: Finished difference Result 404 states and 883 transitions. [2021-06-05 22:05:56,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:05:56,581 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:56,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:56,581 INFO L225 Difference]: With dead ends: 404 [2021-06-05 22:05:56,581 INFO L226 Difference]: Without dead ends: 404 [2021-06-05 22:05:56,581 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 472.1ms TimeCoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:05:56,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-06-05 22:05:56,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 317. [2021-06-05 22:05:56,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.2341772151898733) internal successors, (706), 316 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:56,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 706 transitions. [2021-06-05 22:05:56,584 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 706 transitions. Word has length 21 [2021-06-05 22:05:56,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:56,584 INFO L482 AbstractCegarLoop]: Abstraction has 317 states and 706 transitions. [2021-06-05 22:05:56,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:56,584 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 706 transitions. [2021-06-05 22:05:56,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:56,584 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:56,584 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:56,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4322,929 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:56,785 INFO L430 AbstractCegarLoop]: === Iteration 935 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:56,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:56,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1207237942, now seen corresponding path program 929 times [2021-06-05 22:05:56,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:56,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649411800] [2021-06-05 22:05:56,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:56,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:56,900 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:56,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:56,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649411800] [2021-06-05 22:05:56,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649411800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:56,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103323764] [2021-06-05 22:05:56,901 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 930 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 930 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:56,928 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:05:56,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:56,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:05:56,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:57,133 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:57,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103323764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:57,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:57,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 22:05:57,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438924971] [2021-06-05 22:05:57,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:05:57,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:57,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:05:57,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:05:57,134 INFO L87 Difference]: Start difference. First operand 317 states and 706 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:57,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:57,765 INFO L93 Difference]: Finished difference Result 335 states and 736 transitions. [2021-06-05 22:05:57,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:05:57,765 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:57,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:57,766 INFO L225 Difference]: With dead ends: 335 [2021-06-05 22:05:57,766 INFO L226 Difference]: Without dead ends: 329 [2021-06-05 22:05:57,766 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 591.3ms TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:05:57,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-06-05 22:05:57,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 317. [2021-06-05 22:05:57,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.2341772151898733) internal successors, (706), 316 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:57,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 706 transitions. [2021-06-05 22:05:57,768 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 706 transitions. Word has length 21 [2021-06-05 22:05:57,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:57,768 INFO L482 AbstractCegarLoop]: Abstraction has 317 states and 706 transitions. [2021-06-05 22:05:57,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:57,768 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 706 transitions. [2021-06-05 22:05:57,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:57,769 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:57,769 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:57,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4326,930 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:57,969 INFO L430 AbstractCegarLoop]: === Iteration 936 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:57,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:57,969 INFO L82 PathProgramCache]: Analyzing trace with hash 440821142, now seen corresponding path program 930 times [2021-06-05 22:05:57,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:57,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893033417] [2021-06-05 22:05:57,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:57,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:58,072 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:58,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:58,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893033417] [2021-06-05 22:05:58,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893033417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:58,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346669534] [2021-06-05 22:05:58,072 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 931 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 931 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:58,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:05:58,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:58,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:05:58,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:58,289 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:58,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346669534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:58,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:58,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 22:05:58,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519855601] [2021-06-05 22:05:58,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:05:58,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:58,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:05:58,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:05:58,290 INFO L87 Difference]: Start difference. First operand 317 states and 706 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-06-05 22:05:58,576 WARN L222 SmtUtils]: Removed 3 from assertion stack [2021-06-05 22:05:58,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:05:58,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4331,931 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:58,776 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 22:05:58,778 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 22:05:58,779 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 22:05:58,779 INFO L202 PluginConnector]: Adding new model chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 10:05:58 BasicIcfg [2021-06-05 22:05:58,779 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 22:05:58,780 INFO L168 Benchmark]: Toolchain (without parser) took 918322.81 ms. Allocated memory was 354.4 MB in the beginning and 444.6 MB in the end (delta: 90.2 MB). Free memory was 333.2 MB in the beginning and 221.1 MB in the end (delta: 112.1 MB). Peak memory consumption was 203.8 MB. Max. memory is 16.0 GB. [2021-06-05 22:05:58,780 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 354.4 MB. Free memory was 334.4 MB in the beginning and 334.3 MB in the end (delta: 65.7 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 22:05:58,780 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.36 ms. Allocated memory is still 354.4 MB. Free memory was 333.1 MB in the beginning and 331.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 22:05:58,780 INFO L168 Benchmark]: Boogie Preprocessor took 19.51 ms. Allocated memory is still 354.4 MB. Free memory was 331.6 MB in the beginning and 330.6 MB in the end (delta: 984.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 22:05:58,780 INFO L168 Benchmark]: RCFGBuilder took 343.65 ms. Allocated memory is still 354.4 MB. Free memory was 330.6 MB in the beginning and 312.7 MB in the end (delta: 17.9 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. [2021-06-05 22:05:58,780 INFO L168 Benchmark]: TraceAbstraction took 917924.55 ms. Allocated memory was 354.4 MB in the beginning and 444.6 MB in the end (delta: 90.2 MB). Free memory was 338.9 MB in the beginning and 221.1 MB in the end (delta: 117.9 MB). Peak memory consumption was 208.0 MB. Max. memory is 16.0 GB. [2021-06-05 22:05:58,780 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 354.4 MB. Free memory was 334.4 MB in the beginning and 334.3 MB in the end (delta: 65.7 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 20.36 ms. Allocated memory is still 354.4 MB. Free memory was 333.1 MB in the beginning and 331.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 19.51 ms. Allocated memory is still 354.4 MB. Free memory was 331.6 MB in the beginning and 330.6 MB in the end (delta: 984.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 343.65 ms. Allocated memory is still 354.4 MB. Free memory was 330.6 MB in the beginning and 312.7 MB in the end (delta: 17.9 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. * TraceAbstraction took 917924.55 ms. Allocated memory was 354.4 MB in the beginning and 444.6 MB in the end (delta: 90.2 MB). Free memory was 338.9 MB in the beginning and 221.1 MB in the end (delta: 117.9 MB). Peak memory consumption was 208.0 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (317states) and FLOYD_HOARE automaton (currently 14 states, 20 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 23 for 21ms.. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 27 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 917844.3ms, OverallIterations: 936, TraceHistogramMax: 5, EmptinessCheckTime: 199.5ms, AutomataDifference: 350754.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 15.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 27747 SDtfs, 30240 SDslu, 214977 SDs, 0 SdLazy, 383505 SolverSat, 12209 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 142301.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 33073 GetRequests, 10517 SyntacticMatches, 1080 SemanticMatches, 21475 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94887 ImplicationChecksByTransitivity, 411180.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=321occurred in iteration=931, InterpolantAutomatonStates: 15056, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1483.7ms AutomataMinimizationTime, 935 MinimizatonAttempts, 26387 StatesRemovedByMinimization, 912 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 3277.2ms SsaConstructionTime, 10165.3ms SatisfiabilityAnalysisTime, 347822.2ms InterpolantComputationTime, 35013 NumberOfCodeBlocks, 35013 NumberOfCodeBlocksAsserted, 3307 NumberOfCheckSat, 33147 ConstructedInterpolants, 1896 QuantifiedInterpolants, 433555 SizeOfPredicates, 5744 NumberOfNonLiveVariables, 77643 ConjunctsInSsa, 22969 ConjunctsInUnsatCore, 1866 InterpolantComputations, 6 PerfectInterpolantSequences, 2533/29001 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown